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Dissertations / Theses on the topic 'Crank mechanism'

Author: Grafiati
Published: 4 June 2021
Last updated: 28 May 2022

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1

Faiman, Jiří. "Tříválcový zážehový motor s excentrickým klikovým mechanismem pro osobní vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231763.

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The first part of this thesis deals with the examination of the eccentricity of the crank mechanism for individual variables kinematics and dynamics of crank mechanism, analyticaly computed in Matlab. Then it compares the different possibilities of balancing moments of inertia forces and propose a specific design chosen for the value of eccentricity. In the second part is designed a model of crankshaft mechanism based on the investigated parameters. These parameters were carried out by structural analysis in Ansys.
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2

Mlčoch, Pavel. "Čtyřválcový zážehový motor s excentrickým klikovým mechanismem pro osobní vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232114.

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This Diploma Thesis is aimed at exploring the potential of offset crankshaft mechanism for four cylinder inline petrol engine in terms of reducing the frictional losses of the piston group. Thesis deals with the influence of eccentricity on kinematics, dynamics and balance of the crank train. Furthermore, specific crankshaft balancing is elaborated and applied on 3D CAD model of the crankshaft. Calculation of fatigue safety factor using the advanced LSA method that takes into consideration the effect of forced torsional vibration and utilizes outputs from the FEA software (ANSYS APDL) is performed as well. Thesis also includes design of two options of rubber torsion damper mounted on the engine belt pulley and the follow-up choosing of the more advisable one.
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Novosád, Ivan. "Šestiválcový řadový vznětový motor s vypínáním válců." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417519.

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Master 's thesis deals with design of a drivetrain of six cylinder inline engine with cylinder deactivation for heavy agricultural vehicles. In this thesis were devised various possibilities of crankshaft balancing, the best design solution of counterweight was based on optimization in software Catia. Further, the crankshaft was analysed for force and momentum loading and torsional vibration, based on which, the torsional vibration damper was designed. There were considered several options for cylinder deactivation, which were analysed for finest run of engine and the best thermal distribution. Based on these criteria, the best option was to deactivate 2nd and 5th cylinder. The crankshaft was analysed for the fatigue failure by finite element method. The fatigue failure is the most dangerous case for the crankshaft, the resulting safety factor for this limit state is 3,05.
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4

Gregerson, David Lee. "An investigation of chaos in a single-degree-of-freedom slider-crank mechanism." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/16805.

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5

Mauntler, Nathan A. "Kinematic and dynamic behavior of a wearing joint in a crank-slider mechanism." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024958.

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6

Freisleben, Pavel. "Dvouválcový zážehový motor s excentrickým klikovým mechanismem pro osobní vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232115.

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This thesis deals with forces of the crank mechanism. The aim of this work is to find the right value of the eccentricity of the crank mechanism, which will have a positive effect on the size and course of forces that cause friction losses in the crank mechanism. Next solves this balancing eccentric unit. The last part deals with the design and strength check of the crankshaft considering torsional vibration.
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7

Čep, David. "Klikový mechanismus plynového vidlicového šestnáctiválce." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229090.

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Diploma thesis is trying to analyze crank mechanism of a gas V-sixteen engine. Kinematics and balance crank mechanism are analyzed, dynamic model parameters are dermined, natural frequency of the torsional system are calculated, coupling parameters are designed and torsional problem with attached electric generator is analyzed.
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8

Bazler, Anthony Lee II. "The Redesign of a Recumbent Tricycle Using a Crank Rocker Mechanism To Increase Power Throughput In FES Cycling." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1607681055373292.

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9

Ong, Chin Guan. "Shaking and Balance of a Convertible One- and Two-Cylinder Reciprocating Compressor." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31433.

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This research involves the study of a one- and two-cylinder convertible reciprocating Freon compressor for air conditioning or refrigeration purposes. The main concern is the reduction of the vibration (noise) caused during the operation of the compressor. Vibration is a main concern when the compressor is shifted from the one-cylinder operation to the two-cylinder operation mode and the reverse of this shift. The objectives for this research are (1) to investigate the shaking force due to the reciprocating mass at high frequencies, which are up to 4600 Hz (80w) in this research; (2) to determine the dominant force for compressor vibration among the three possible sources of shaking force due to reciprocating mass, impact forces due to clearance at the connecting rod - piston joint, and the z-axis force from the motor torque due to the rotor's conductor rods being skewed at an angle; (3) to minimize the difference in change of kinetic energies when switching between the one- and two-cylinder operating modes of the compressor. The properties of the vibration in one- and two-cylinder operation have been studied and results have been analyzed in terms of kinetic energies generated in different setting of operation of the compressor. Dynamic simulation for the impact force is computed using SIMULINK. The Z-axis force due to the motor is computed. Results indicated that shaking force due to the reciprocating mass is the dominant force for only the first two harmonics (w, 2w). An optimization routine based on Hooke and Jeeves pattern search method is developed and an optimized setting of angle, force, and torque for balancing of the crankshaft to achieve objective (3) is determined.
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10

Stodolák, Martin. "Teoretické řešení pneumobilu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229939.

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This thesis covers the theoretical solution of the compressed air powered vehicle. The first section describes the competition of the compressed air powered vehicles, that is annually held in Hungary, where the idea for such a car design was created. There are also additional descriptions of the construction of the machines from the hungarian competition. In the second section there is a calculation of the chosen vehicle construction, where the main emphases is based on the calculation of the drive of the vehicle. The description of the manufacturing, tests and vehicle presentation follows.
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11

Šafařík, Petr. "Dvoudobý motor pro paragliding." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377466.

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This diploma thesis deals with the design of a two-stroke engine for paragliding. First of all, the different types and designs of two-stroke engines are discussed. After the design of the crank mechanism, the forces in the engine are tested, followed by the strength control of selected components. In addition, the work includes design of individual engine components, propeller reducer and 3D models of components and motor unit.
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12

Ducheček, Martin. "Čtyřválcový řadový vznětový motor s excentrickým klikovým mechanismem pro užitková vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232116.

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The purpose of this thesis is to evaluate the influence of eccentricity of crank mechanism to the force between the piston and the cylinder liner for appointed crank mechanism. Furthermore the influence of eccentricity to balancing crankshaft is verified and for selected value of eccentricity is realized balance. For the construction check was realized stress analysis of crank mechanism included torsion vibration.
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13

Hlaváč, Štěpán. "Dvoudobý motor pro malý motocykl." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-227891.

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This diploma thesis contains an engineering design of a two-stroke engine for small motorcycle. In the first part, the background research of these motors was made. Main dimensions of the engine and a calculation of the forces acting in crank mechanism were determined. Further check stress analysis of connection rod and calculation using a finite element method were performed. This diploma thesis also includes virtual 3D models of all designed parts and a drawing of cross section of the motor.
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Rexová, Natálie. "Inovativní nástroj pro odstranění špatné výslovnosti hlásky „R“." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316812.

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The purpose of this final thesis is to find out about Speech Therapy and to design a device which would help with oscillation of human tongue when the sound r is pronounced. To better understand this subject first part of this thesis takes interest in evolution and physiology of human speech. Next the most common articulation disorder Dyslalia is named and methods for treating Dyslalia are described. In practical part the device for Speech Therapy is designed and created. It is based on frequency of human tongue oscillations and it helps to correct difficulties with sound r articulation. This prototype uses electric motor which is controlled by Arduino platform. Its rotational motion is converted to linear through mechanical construction simulating crank mechanism.
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15

Böhm, Milan. "Dvoudobý motor pro malou mechanizaci." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-227890.

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This diploma thesis includes progress constructional design of 2 - stroke engine for small mechanization, using modern tools of computer aided design. In the first part is mentioned short summary contemporary types small mechanization with 2 - stroke engines. Follows part devoted conceptual design with calculation of the main dimensions of engine cylinder. After assesment strength load of cranked mechanism, is effected stress analysis of connection rod, whose design and modeling is part of work, how by the help of analytical figures from appropriate literature so by final element method. Last part of those work is estimation results with presentation parameters, which affect power of 2 - stroke engines for small mechanization.
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16

Černohous, Tomáš. "Dvouválcový řadový vznětový motor s excentrickým klikovým mechanismem pro užitková vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232050.

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The goal of this master’s thesis is to examine the influence of eccentricity on the behaviour of forces between the piston and cylinder liner and on balancing of the crank mechanism for given parameters of the diesel engine. Another aim of this paper is to propose an appropriate balancing of the crank mechanism followed by stress analysis considering torsional vibration for a chosen value of eccentricity.
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17

Horváth, Tomáš. "Zážehový sedmiválcový hvězdicový letecký motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399358.

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The aim of this diploma thesis is to propose a drive train of a seven-cylinder radial engine, including strength analysis of selected components. The basic parameters of the engine cylinder are based on the Škoda 1.2 HTP 12V 47kW AZQ engine.
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18

Vetešník, Pavel. "Výpočtové porovnání ojnic zážehových motorů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-377364.

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Diploma work is focused on computational comparison of con-rod of spark ignition four-cylinder engine with volume 1289 cubic centimeters and con-rod of spark ignition three-cylinder engine with volume 1198 cubic centimeters. 3-D models of inspected con-rods were based on real shape. Force loads effects were established after kinematic and dynamic analysis. Stress analysis was made for these force loads effects in selected cases with help of Finite element method. Two con-rods were compared by using of these results.
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19

Donutil, Jan. "Zážehový pětiválcový hvězdicový letecký motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399287.

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This thesis deals with configuration of radial five-cylinder engine with attention to crank mechanism. Covered topics are motion of crank mechanism with articulated connecting rod, force analysis and balancing of inertial forces. The second part discusses FEM analysis and calculation of safety factor of selected component.
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20

Avanço, Rafael Henrique. "Análise da dinâmica não-linear de pêndulos com excitação paramétrica por um mecanismo biela-manivela." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18149/tde-27052015-113137/.

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O presente trabalho trata da análise da dinâmica de um pêndulo simples excitado em seu suporte por um mecanismo biela-manivela de forma ideal e não-ideal. No caso ideal, verifica-se que o resultado da excitação por este tipo de mecanismo se aproxima do resultado da excitação harmônica de suporte do pêndulo quando o raio da manivela é suficientemente pequeno em comparação com o comprimento da biela. A equação diferencial do sistema é resolvida numericamente e resultados do comportamento pendular são obtidos através de mapas de fase, histórico no tempo e seções de Poincaré. Expoentes de Lyapunov são, também, obtidos para a análise de casos caóticos posteriormente comparados com diagramas de bifurcação. Bacias de atração são desenhadas para os resultados estáveis do pêndulo: oscilatórios ou rotativos. Os resultados obtidos para a excitação por biela-manivela são dos mesmos tipos de movimento observados no caso do pêndulo excitado harmonicamente no suporte, entre eles: ponto fixo, oscilação, rotação pura, oscilação-rotação e o caos. Para a frequência de ressonância principal observam-se resultados caóticos em faixas mais largas de amplitude quando o raio de manivela se aproxima do comprimento da biela. Em frequências ressonantes menores nenhuma relação desse tipo pôde ser estabelecida. Uma análise utilizando o mesmo mecanismo é também feita com excitação por potência limitada de um motor elétrico linear de corrente contínua onde se investigou o efeito de feedback dado pelo pêndulo sobre o motor. Esses resultados são comparados com o caso ideal com a manivela acionada com rotação constante. Observa-se uma supressão do caos no caso não-ideal em casos de menor potência no motor. Entretanto, quando a potência de motor é maior, o modelo ideal coincide com o não-ideal.
In this analysis it was studied the dynamics of a simple pendulum excited by a crank-shaft-slider mechanism in the support ideally and non-ideally. In the ideal case, it was verified the result for an excitation by a crank-shaft-slider approaches to the result of the harmonically excited pendulum when the radius of the crank is sufficiently small in comparison with the length of the shaft. The resultant differential equation is solved numerically and the results of pendulum behavior are obtained by phase portraits, time histories and Poincaré sections. It is also calculated the Lyapunov exponents for the chaotic cases in analysis and a comparison is performed with bifurcation diagrams in the same regions. Basins of attractions are plotted for stable results like oscillatory and rotational solutions. In the results observed for the crank-shaft-slider excitation there are kinds of motion similar to those observed in the harmonic excitation: fixed points, oscillation, pure rotations, oscillation-rotations and chaos. However, in the principal resonance zone, chaotic results were more frequent when the radius of crank approaches the shaft length. A brief analysis is done concerning the same mechanism, but considering the excitation by limited power supply of a linear DC motor. In the sequence it is checked the feedback effect from the pendulum over the motor and comparison with the respective ideal excitation is accomplished where differences are commonly observed. With greater power the ideal model coincides with the nonideal model. In cases of lower power, the two models diverge in the results.
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21

Steigl, Vladimír. "Čtyřválcový zážehový motor s vypínáním válců." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318839.

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The aim of this diploma thesis is design of configuration and balancing of crankshaft which is determined for four-cylinder gasoline engine. The thesis investigates kinematics, dynamics and possible ways of balancing the inertial forces and moments of the rotating and sliding parts of the central crank mechanism. Subsequently, the 3D CAD model is designed according to the presented drawing. It is transformed into a spare torsion system, from which the calculations of its own and forced torsional vibrations are based. The proposed 3D CAD model is then spatially transmitted in the FEA software Ansys Workbench and modified (boundary conditions, etc.) in the FEA software Ansys Mechanical APDL so that it can be calculated according to the selected LSA method. From the selected results of the LSA method, the crankshaft safety factor against fatigue damage is calculated.
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22

Шемелова, О. В. "Управление динамикой системы посредством программных связей." Thesis, Сумский государственный университет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/39341.

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В работе представлены результаты исследования динамики электромеханической системой, управление которой осуществляется за счет подачи мощности двигателю переменного тока. Преобразованный электрический ток обеспечивает работу кривошипно-шатунного механизма.
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23

Špaček, František. "Výpočtová analýza pístu řadového tříválcového zážehového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-377361.

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The diploma thesis deals with a mechanical and thermal analysis of 3-cylinder petrol engine piston with capacity of 1,2 l and maximal output 47 kW. The computation analysis was created with the use of finite element method in the Ansys application. The strain solution was created using several techniques. The 3D model was made according to a real piston in the Pro/Engineer and was partly simplified for computation. Crank mechanism forces and the load stresses were solved using Mathcad. Calculations are done for three positions of power cycle engine, where the maximal loads of the piston are expected. Last part of the thesis is calculation of safety factor highcyclical fatigue made using Femfat application.
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Biječek, Tomáš. "Deformačně-napjatostní analýza ojnice spalovacího motoru pomocí MKP." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228164.

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In this diploma thesis is completed the FEM analysis of connecting rod in combustion engine Briggs & Stratton of the garden lawnmower. Within the frame of computing in the FEM system ANSYS Workbench is solved static structural strein and stress analysis, buckling analysis a fatigue also. The boundary conditions for FEM computing come out from the kinematic and dynamic analysis of the crank-slider mechanism in combustion engine. The 3-D models of the crank-slider mechanism are created in parametric SolidWorks modeller. Own construction variants of the connecting rod based on results of FEM analysis are also designed.
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Камаш, Корнелія Корнелівна, and Korneliia Kornelivna Kamash. "Проект дільниці ремонтного цеху для удосконалення технології відновлення деталей кривошипно-шатунного механізму двигунів автомобіля КамАЗ-740 з дослідженням впливу механічних навантажень." Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2020. http://elartu.tntu.edu.ua/handle/lib/33539.

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Роботу виконано на кафедрі автомобілів Тернопільського національного технічного університету імені Івана Пулюя Міністерства освіти і науки України. Захист відбудеться 21 грудня 2020 р. о 14:30 годині на засіданні екзаменаційної комісії № 10 у Тернопільському національному технічному університеті імені Івана Пулюя за адресою: 46001, м. Тернопіль, вул. Текстильна, 28, навчальний корпус № 9, ауд. 106.
В кваліфікаційній роботі розроблено технологію відновлення деталей кривошипно-шатунного механізму двигунів автомобіля КамАЗ-740, а також досліджено вплив механічних навантажень.
The qualification work developed the technology of restoration of parts of the crank-shatun mechanism of the engines of the kamAZ-740 car, as well as the impact of mechanical loads.
Вступ ...7 1. ЗАГАЛЬНО-ТЕХНІЧНИЙ РОЗДІЛ ...8 1.1 Аналіз процесів зношування деталей машин ...8 1.2 Аналіз технологій залізнення деталей автомобілів ...10 1.3 Аналіз технологій хонінгування деталей автомобілів ...15 2 ТЕХНОЛОГІЧНИЙ РОЗДІЛ ...23 2.1 Аналіз технологічності деталі ...23 2.2 Обґрунтування маршруту відновлення ...24 2.3 Розрахунки й вибір режимів обробки відновлюваних поверхонь шатуна й технічне нормування операцій ...25 2.4. Проектування ділянки відновлення шатунів ...40 3 КОНСТРУКТОРСЬКИЙ РОЗДІЛ ...44 3.1 Використання приспосіблень в умовах АТП ...44 3.2 Приспосіблення для кріплення шатуна і принцип роботи ...45 3.3 Розрахунки приспосіблення на міцність ...46 3.4 Конструювання й розрахунки гідравлічного приводу ...50 3.5 Конструювання й розрахунки приспосіблення ...53 4. НАУКОВО-ДОСЛІДНИЙ РОЗДІЛ ...56 4.1 Огляд впливу механічних навантажень ...56 4.2 Наукові дослідження навантаження КШМ ...57 5. ОХОРОНА ПРАЦІ ТА БЕЗПЕКА В НАДЗВИЧАЙНИХ СИТУАЦІЯХ ...63 5.1 Виробнича санітарія ...63 5.2 Техніка безпеки ...66 5.3 Пожежна безпека ...67 5.4 Охорона навколишнього середовища ...68 5.5 Розрахунки контуру заземлення ...69 ЗАГАЛЬНІ ВИСНОВКИ ..72 ПЕРЕЛІК ПОСИЛАНЬ ....73 ДОДАТКИ
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Kučera, Ondřej. "Čtyřválcový řadový zážehový letecký motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444959.

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The thesis deals with the structural design of a steel connecting rod for the aircraft engine Walter Mikron III, which is currently still manufactured and developed by company PARMA-TECHNIK, s.r.o. The proposed connecting rod would replace the current duralumin connecting rod. The work also contains a strength analysis of the designed component, in which it was aimed to verify the stress on the connecting rod, based on which the fatigue safety factor was performed. This is crucial for dynamically stressed parts of internal combustion engines. Furthermore, was investigated the effect of the change of the connecting rod on the torsional vibration of the crank mechanism. For this purpose, was built a discrete torsion model. The output of the whole work is the drawing documentation of the new connecting rod, meeting the requirements for application in an aircraft engine.
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Ehrenberger, Pavel. "Modální vlastnosti klikového ústrojí čtyřválcového traktorového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228988.

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This diploma thesis contains a summary of the general information about the torsion vibration of the crankshaft. The main task is to prepare a flexible model of the crankshaft in the FEM program ANSYS and the subsequent export into the MBS ADAMS / Engine. According to parameters the model of four-cylinder line tractor engine with flexible crankshaft is built. Crank mechanism is analyzed to determine the natural frequencies and natural modes. Finally the results are evaluated and compared with analytical calculations.
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Süttő, Daniel. "Pětiválcový řadový vznětový motor s excentrickým klikovým mechanismem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231456.

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The aim of this thesis is to find out the influence of eccentricity of crank mechanism on the duration of the force between the piston and the cylinder liner. At the same time I wanted to find out its influence on the balance of the whole system. It is important to design the balance for the selected value of the eccentricity and subsequently put through the crank shaft to stress analysis with torsional vibrations. I got so interested in this problem that in addition to the whole topic I designed a torsional vibration damper.
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Petr, David. "Hydrodynamická ložiska vznětového traktorového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228924.

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This thesis deals with the hydrodynamic plain bearings tractor diesel engine. The first part is closer acquainted with the hydrodynamic bearing, its principles and materials used. The next part work deals with the multibody system adams-engine. The main part of this work is to model the crank mechanism and its storage in hydrodynamic bearings in the MBS program and the subsequent simulation under different operating conditions.
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Nikolaychuk, Yaroslav. "Čtyřválcový vznětový motor pro užitková vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377457.

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The diploma thesis focuses on the design of the crankshaft for a four-cylinder diesel engine for commercial vehicles, the main task of this work are the design configuration of the crankshaft balance inertia forces and torques at the crank mechanism, drawing documentation crankshaft design strength check considering torsional vibration.
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Švarc, Marek. "Pětiválcový vznětový motor pro užitková vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318711.

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The aim of this diploma thesis is the design of the configuration and the method of balancing the crank mechanism with the specified parameters. For a particular configuration, a crankshaft drawing is processed and a strength analysis, considering the crankshaft torsional vibrations is performed in Ansys FEM software. At the end of the thesis, an ideological design of the torsional vibration damper and its effect on the crankshaft stress in the Ansys FEM software is performed.
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Doležal, Lukáš. "Inovace skládané klikové hřídele pro minibikové motory." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229398.

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The present diploma thesis deals with innovation of built-up crankshaft of Blata minibikes. Minibike is the type of a small two-stroke motorcycle equipped with an internal combustion engine of the volume 40 or 50 cm3. The machine is designed for racing circuits; not only for young riders but also for seniors. The innovation is in the design and verification of pressed connections in the imposition of major pins in the arms of the crankshaft. Pressed connections are designed on the basis of the analysis of force interaction on the crankshaft at maximum revolutions. The proposed solutions are verified by FEM calculations. Based on the results, the best option is selected. For the selected option, the impact of force interaction at maximum machine performance is studied. Finally, on the basis of these facts, designing, technological and economic analysis of feasibility of new production technology is carried out.
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Novák, Vít. "Pohonné ústrojí čtyřválcového řadového zážehového leteckého motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417579.

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The focus of this work is to determine the stress of the crank mechanism of the inverted piston aircraft engine Walter Mikron III C UL from the manufacturer PARMA - TECHNIK, s.r.o. The main method of calculation is the numerical finite elements method using the program ANSYS Workbench, the module Static structural and Transient structural. The approximate indicated cylinder pressure during the duty cycle was determined in the GT-SUITE software. The partial goals are to propose possible modifications in the construction of the crank mechanism and to state the possible power reserves of the engine. The diploma thesis also briefly summarizes the history and development of aircraft piston engines from the company Walter, which developed the engine, and the line of Walter Mikron engines.
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Gerardin, Rodrigo Ceccatto. "Modelo dinamico do sistema pistão-biela-manivela com mancais hidrodinamicos." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263457.

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Orientador: Marco Lucio Bittencourt
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-05T06:50:24Z (GMT). No. of bitstreams: 1 Gerardin_RodrigoCeccatto_M.pdf: 1433853 bytes, checksum: d1832bbbe32aa8b2f8edb3756793f3f5 (MD5) Previous issue date: 2005
Resumo: Atualmente, devido as exigências comerciais e técnicas, os motores de combustão interna operam com pressões de combustão cada vez mais altas. Ao mesmo tempo, deve-se otimizar a operação de todo sistema e a forma dos componentes levando-se em conta a melhor performance e redução de peso. Para um melhor entendimento do comportamento dinâmico de um motor de multi cilindros, é necessário verificar a cinemática e a dinâmica para apenas um cilindro como feito neste trabalho. O foco principal deste trabalho é desenvolver um modelo matemático para determinar as distribuições de pressão e as forças atuantes nos mancais hidrodinâmicos para um cilindro de um motor de combustão interna. Um modelo dinâmico do sistema de pistão-biela-manivela é apresentado e permite calcular as forças dinâmicas e folgas no mancal principal, olhais maior e menor da biela derivados da pressão de combustão. O modelo matemático do mancal hidrodinâmico radial é oriundo da equação de Reynolds e resolvido utilizando o Método de Elementos Finitos. O sistema dinâmico não-linear é resolvido utilizando o método iterativo de Newton-Raphson para cada passo de integração no tempo
Abstract: Due to the current commercial and technical requirements, the internal combustion engines must operate under higher pressures. It is also necessary to optimize the system operation and the shape of the components aiming at increasing the performance and weight reducing. For a better understanding of the dynamical behavior of a multi-cylinder engine, it is necessary to verify the kinematics and dynamics for just one cylinder, as considered in this work. The main focus of this work is the development of a mathematical model to determine the pressure distributions and the hydrodynamic bearing forces for one cylinder internal combustion engine. The dynamical model of the piston-conrod-crank system is presented and allows the calculation of the dynamic forces and clearances obtained from the combustion pressure for the main, big-end and small-end bearings. The mathematical model of the hydrodynamic bearing comes from the Reynolds equation and is solved by the Finite Element Method. The non-linear dynamic system is solved by the iterative Newton-Rhapson method for each time integration step
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica
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35

Hruška, Miroslav. "Hydrodynamická ložiska šestiválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229930.

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This master’s thesis focuses on hydrodynamic plain bearing drivetrain in-line sixcylinder diesel tractor engine. In the first part is used as reported in contemporary bearing materials and design solutions bearing basins. Furthermore, given the general Reynolds equation of hydrodynamic lubrication. The main part of the thesis is devoted to creating a virtual model of the crank mechanism in MBS system ADAMS/Engine. Rigid crankshaft in this model is replaced by the flexible crankshaft, which is prepared in the FEM software ANSYS and then exported. The final section presents the results of simulations and their evaluation.
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36

Oliva, Petr. "Jeřábová kočka hradidlového portálového jeřábu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442808.

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This master´s thesis deals with the design of a crane trolley with the main and ancillary lift according to the specified parameters. The aim of the work is the elaboration of technical calculations and drawing documentation. The technical report deals with the design of lifting mechanisms, travelling mechanism and design and strength control of the crane frame. The drawing documentation includes a stroke assembly drawing, a travel assembly drawing, a frame steel structure assembly drawing, and a general crane cat assembly drawing.
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37

Gieseke, Brian G. "Mechanics and mechanisms of creep-fatigue crack growth in Cu-1 wt% Sb." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/19982.

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38

Brzobohatý, Petr. "Mostový jeřáb - návrh jeřábové kočky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228909.

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The diploma work deals with design of lifting mechanism of overhead crane trolley with a load capacity 200 t. The main objective is design and analysis of selected components of lifting mechanism and components which are directly associated with lifting mechanism. Work includes design elements of a rope system, such as rope, rope drum, sheaves, sheave block, elements of the proposals of propulsion, such as engine, transmission, brake, coupling. The work contains also strength calculations of some components and drawing documentation.
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39

Bartušek, Filip. "Posouzení traverzy mostového magnetového jeřábu 15t." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241868.

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The diploma thesis deals with some parts of bridge magnet crane with 15 tons of nominal lifting capacity. This crane is designed for operation in the steel mill for handling billets using magnets suspended on the traverse. This work is focused on design of hoisting and traverse mechanism of crane trolley, selection of individual components on the basis of relevant standards and calculations. Next part of this thesis is investigation magnet traverse in terms of its strength according to standard ČSN EN 13001.
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40

Shademan, Sassan Steven. "Mechanism-based models of fatigue crack growth /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488203857249745.

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41

Pulava, Oleksandr. "Šestiválcový vznětový motor pro užitková vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378397.

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The aim of this diploma is to design a crankshaft for a six-cylinder commercial vehicle, which is one of the unified motors. The main parts are the design of the crankshaft configuration, the crankshaft balancing method for forces and moments, the crankshaft design documentation, and the crankshaft strength verification. The design of torsional vibration damping characteristics is also made and its effect on torsional vibration and crankshaft strength is determined.
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42

Гороховацька, Ю. В. "Дослідження процесу зносу деталей системи колінчастого вала та його впливу на ресурс та надійність автомобіля /комплексний проєкт/." Thesis, Чернігів, 2021. http://ir.stu.cn.ua/123456789/23215.

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Гороховацька, Ю. В. Дослідження процесу зносу деталей системи колінчастого вала та його впливу на ресурс та надійність автомобіля /комплекс-ний проєкт/ : випускна кваліфікаційна робота : 274 «Автомобільний транспорт» / Ю. В. Гороховацька ; керівник роботи В. І. Кальченко ; НУ "Чернігівська політехніка", кафедра автомобільного транспорту та галузевого машинобудування. – Чернігів, 2021. – 158 с.
В даній кваліфікаційній роботі магістра проектується легковий повнопривідний автомобіль з модернізацією муфти зчеплення та проведений розрахунок сил які діють на колінчастий вал. У якості автомобіля прототипу було вибрано ВАЗ 2121 з попереднім його описом. Також визначенні масові показники автомобіля, побудовано зовнішню швидкісну характеристику двигуна та силовий баланс автомобіля. Проведений розрахунок двигуна, в якості прототипу - ВАЗ 2106. Проведено розрахунок показників динамічності, паливної економічності та гальмування автомобіля з побудовою відповідних графіків. Було розраховано основних функціональних елементів зчеплення автомобіля з його модернізацією, модернізація полягає в збільшенні діаметру фрикційних накладок зчеплення автомобіля.
In this qualifying work of the master, a passenger all-wheel drive car with modernization of the clutch is designed and the calculation of the forces acting on the crankshaft. VAZ 2121 with its preliminary description was chosen as a prototype car. Also the mass indicators of the car were determined, the external speed characteristic of the engine and the power balance of the car were built.The calculation of the engine, as a prototype - VAZ 2106. The calculation of indicators of dynamism, fuel economy and braking of the car with the construction of appropriate schedules. The main functional elements of the car's clutch with its modernization were calculated, the modernization consists in increasing the diameter of the car's clutch friction linings.
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43

Begáň, Matej. "Kočka šrotového jeřábu - otočná část." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442799.

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The diploma thesis deals with a design of a rotating part of a crane trolley of a scrap crane with a load capacity of 110,000 kg, which is situated in an exterior environment. The aim of the diploma thesis is a design and calculation verified design of the lifting mechanism, rotation mechanism and the design of a spacious traverse, which is used for the manipulation of the scrap trough and casting ladle.
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44

Loureiro-Homs, Jordi. "Modelling of TMF Crack Growth in Polycrystalline Gas Turbine Alloys : Accounting for Crack Closure Effects." Licentiate thesis, Linköpings universitet, Mekanik och hållfasthetslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-170275.

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The main objective of the work presented in this Licentiate of Engineering thesis is to investigate and model the fatigue crack propagation behaviour of the nickel-based superalloy Inconel 792, with special attention to the industrial lifing of high-temperature components. In-phase (IP) crack propagation tests have been performed at different temperatures and loading regimes, including extended hold times. The observations from these tests have been the basis for establishing several hypotheses to describe the crack growth behaviour, which progressively have been verified experimentally and numerically. Most prominently, it has been observed that crack closure has a substantial impact on crack growth and can explain, to a large degree, the crack growth behaviour for this material under the conditions studied. This phenomenon has been observed experimentally and modelled numerically to extend further the precision of the methodology.
Huvudsyftet med arbetet som presenteras i denna licentiat avhandling är att undersöka och modellera utmattnings sprickväxtbeteendet hos den nickelbaserade superlegeringen Inconel 792, med särskild uppmärksamhet riktad mot liuslängsdmodellering av högtemperaturkomponenter i en industriell kontext. I-fas (IP) sprickväxtprov har utförts vid olika temperaturer och belastningsregimer, inklusive hålltider. Observationerna från dessa tester har legat till grund för hypoteser för att förklara spricktillväxtbeteende, vilka successivt har verifierats experimentellt och numeriskt. Mest framträdande har det observerats att sprickslutning har en väsentlig inverkan på sprickväxten, och kan i stor utsträckning förklara sprickväxten för detta material under studerade förhållanden. Detta fenomen har observerats experimentellt och modellerats numeriskt för att förbättra metodens precision.

Ytterligare forskningsfinansiär: Siemens Energy through "Turbines for Future Energy Systems" (Turbiner forframtidens energisystem), Grant No.44100-1

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Baer, Máren Ingá. "Crack propagation calculations in non-elastic metals." Thesis, Luleå tekniska universitet, Material- och solidmekanik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-71108.

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It is important to know the lifespan of a component, thus services can be planed. At Siemens Industrial Turbomachinery AB (SIT AB) develop and produce gas and steam turbines, the turbines are heavily strained by thermal and centrifugal forces during their life span which lead to cracking. Today there is no good crack propagation method for materials with large amount of plastic deformation and creep. At SIT a new method, ΔKBDCPP, has been developed that takes these phenomenon in consideration. It is assumed that the whole model has plastic material properties except circular elements at the crack front which have elastic properties. The new method is reviewed by doing simulations on a a specimen model in Franc3D together with the FE program Abaqus. There have been conducted thermo-mechanical fatigue (TMF) tests and 2D simulations on specimen to measure the crack propagation. The TMF tests where immitaded in new simulations with the method ΔKBDCPP. Forces, creep times, cycles and material data where emulated in the model and then simulated. The number of cycles per crack length for the isothermal simulations became higher then for the TMF tests. This is a expected result because the conditions are optimal during simulations, which they may not be during experimental test. The result of ΔKBDCPP are closer to the TMF test results then the 2D simulated ΔKeffective, another crack propagation calculation method. Additionally, out-of-phase (OP) simulations where carried out, in OP the maximum temperature and maximum stress do not coincide. When the temperature is at max the component is held in the minimum stress. For OP simulations the results became irregular, for one of the simulations the number of cycles per crack length became lower for the simulated specimen than for the TMF test, and contrariwise for the other OP simulation. However, it was concluded that the later was correct because the majority of the simulations, and all the isothermal simulations, gave this result. it also was the result for the isothermal simulations. One OP simulation was compared to a 2D simulation and here the method of ΔKBDCPP was also more accurate to the TMF tests. The method of ΔKBDCPP seem to function well however, the solving time for models with creep is long. A model with a small crack and creep is time consuming to simulate, which is a disadvantages.
Det är viktigt att veta livslängden på en komponent, då kan det planeras för en service. På Siemens Industrial Turbomachinery AB (SIT AB) utvecklas och produceras det gas- och ångturbiner, turbiner utsätts för höga temperaturer och krafter under dess livstid vilket resulterar i sprickor. Idag finns det inte en bra sprickpropageringsteori för material i ett stort plasticerat tillstånd och kryp, SIT har därför tagit fram en ny metod som ska ta hänsyn till dessa parametrar. I den nya beräkningsmetoden, ΔKBDCPP, antas det att hela modellen har en plastisk materialmodell förutom ett antal ringelement vid sprickspetsen som antas ha en elastisk materialmodell. Den nya metoden undersöks genom att provstavsmodell simuleras i programmet Franc3D tillsammans med Abaqus. Det har tidigare gjorts termodynamiska utmattningsprov (TMF), samt simuleringar i 2D, på provstavar för att mäta sprickpropageringen. Därför imiterades dessa TMF prov i nya simuleringar med metoden för ΔKBDCPP. Krafter, hålltider, cykler och materialdata efterliknades i modellen och sedan kördes simuleringarna. För de isoterma körningarna blev resultatet att antalet cykler per spricklängd är högre för simulerade värden än för TMF prover, vilket var väntat. Vid simulationer är det optimala förhållanden utan avvikelser, vilket kan finnas vid experimentella tester. De simulerade värdena för ΔKBDCPP stämmer bättre överens med TMF proverna än de 2D simulerade resultaten för ΔKeffective, en annan beräkningsmodell för sprickpropagering. Även out-of-phase (OP) simuleringar genomfördes, vid OP sker inte temperatur max och spännings max samtidigt. När det är max temperatur hålls komponenten i den minimala spänningen. För OP simuleringarna blev resultatet annorlunda, ena körningen blev antalet cykler per spricklängd lägre för de simulerade värden än för TMF prover och i den andra blev det tvärt om. Dock drogs slutsatsen att den senare stämde då majoriteten av körningarna, och alla isoterma körningar, gav det resultatet. En OP körning jämfördes med en 2D körning och även där var metoden för ΔKBDCPP närmare TMF provsresultatet. ΔKBDCPP metoden verkar fungera bra, dock är simuleringstiden för att lösa körningar med kryp väldigt lång. En modell med en liten spricka och kryp är mycket tidskrävande att lösa, vilket är en nackdel.
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46

胡思來 and See-loi Wu. "Numerical analysis of dynamic crack propagation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31208459.

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Wu, See-loi. "Numerical analysis of dynamic crack propagation /." [Hong Kong] : University of Hong Kong, 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12354569.

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48

Jadrný, Jan. "Výpočtový model vyvažovací jednotky řadového pětiválcového motoru v multi-body systému." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228008.

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The diploma thesis deals with a calculation and a construction concept of a balancing unit of a strait five cylinder combustion engine. The thesis contains the calculation and the construction concept of the balancing shafts. Also the concept of the calculation model of a driving mechanism with the balancing unit in MSC Adams – Engine is included.
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Fung, Kam-sang. "Fatigue crack propagation with strain energy density approach /." [Hong Kong] : University of Hong Kong, 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12827204.

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50

Lados, Diana Aida. "Fatigue crack growth mechanisms in Al-Si-Mg alloys." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0204104-125758.

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Thesis (Ph. D.)--Worcester Polytechnic Institute.
Keywords: Microstructure; Elastic-Plastic Fracture Mechanics; Crack closure; A356; J-integral; Conventionally cast and SSM Al-Si-Mg alloys; Residual stress; Heat treatment; Fatigue crack growth mechanisms; Threshold stress intensity factor; Plastic zone; Paris law; Fracture toughness; Roughness. Includes bibliographical references.
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