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Dissertations / Theses on the topic 'Torsional vibration damper'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

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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2

Galásek, Martin. "Pryžový tlumič torzních kmitů čtyřválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377464.

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The diploma thesis ‚Rubber Torsional Vibration Damper Of a Four-Cylinder Diesel Engine‘ covers all the development phases related to a design of a rubber damper for a specified engine. The individual phases of it are discussed in details throughout the thesis. At first, the construction plan of a crankshaft is given. The computational checks for torsional vibrations and forced torsional vibration are performed then. With regards to it there might be derived the basic parameters and dimensions of a rubber torsional vibration damper. The knowledge of them enables to prepare the constructional plan of a rubber torsional vibration damper. By using this damper construction plan the torsional displacements (deviations) and forced vibrations are calculated. Finally, a mechanical and thermal stress test of this damper is performed and a crankshaft production drawing is produced.

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3

Kovář, Lukáš. "Silikonový tlumič torzních kmitů šestiválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318694.

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The aim of this thesis is to design crankshaft for in-line six-cylinder diesel engine and to design viscous torsional vibration damper for the cranktrain of specified parameters. The thesis includes the creation of a dynamic torsional model of cranktrain and calculation of forced vibrations of mechanism with and without damper. Part of this thesis is also strength analysis of the designed crankshaft with damper using the Finite Element Method (FEM).

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4

Jurík, Juraj. "Torzní kmitání tříválcového motoru s vyvažovací hřídelí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318532.

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Content of this master thesis is analysis of torsional vibration of the three cylinder engine with balancing shaft. In theoretical part of the thesis the kinematic and dynamic description of the cranktrain mechanism is included. The formation of unbalancing of the engine and methods of balancing are described in the theoretical part as well. In practical part of the thesis the analytical calculation of torsional vibration is provided. Simulation of the engine model in multibody software Adams/Engine was used as the other way of torsional vibration analysis. In the result part of the thesis the comparison of the both way of analysis were discussed. Last step of the thesis was design proposal of the torsional vibration damper done by the analytical calculation.

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5

Polášek, Michal. "Tlumič torzních kmitů pro řadový pětiválcový motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228079.

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In this diploma thesis is created a cranktrain model in the MBS system ADAMS Engine. The thesis defines basic parameters and proportions of the torsional damper for in-line 5-cylinder engine. This thesis also puts mind to calculation of torsional vibration. In the MBS system ADAMS Engine is demonstrated affect of torsional damper on the torsional vibration of the crankshaft.

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6

Matula, Petr. "Pryžový tlumič torzních kmitů řadového šestiválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228282.

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This diploma thesis is called „Rubber damper of a six-cylinder in-line diesel engine“. It consists of brief introduction to crankshaft torsion and dampers, basic analysis of crank vibrations including crank natural frequencies calculation and analytic verification of torsional vibration stress. It contains also a concept of rubber damper and verification of crankshaft with mounted damper.

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7

Bůžek, Václav. "Viskózní tlumič torzních kmitů čtyřválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229790.

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The point of the dissertation is to describe the design of powertrain of four-cylinder diesel engine equipped with vibration damper. After estimating the discreet model of powertrain, forced vibration calculation is performed to design appropriate vibration damper. The following part describes the safety factor solution of crankshaft fatigue using FEM. The dissertation provides a useful comparison for versions with and without damper. Crankshaft and viscous type vibration damper drawings are also included as appendices.

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8

Hejda, Tomáš. "Hnací ústrojí nekonvenčního vidlicového vznětového šestiválce s viskózním tlumičem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229894.

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The purpose of this thesis is design an unconventional powertrain V-6 engine with cylinder opening lines offset 90 degrees and 30 degrees of crank pin offset. It is an analysis of the balance of the crank mechanism, proposed unbalance, build a model of discrete torsion system, design of viscous torsional vibration damper, compares the results of the calculation of strength without crankshaft damper and with damper.

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9

Říha, Stanislav. "Viskózní tlumič torzních kmitů plynového vidlicového šestnáctiválce." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229308.

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Master’s thesis with title Viscous torsional vibration damper of a gas v-sixteen engine deals with torsion vibrafon of the crankshaft and chance how to eliminated it. First part of diploma thesis containes calculation of torsion vibrafon without damper. In second part is added damper. In the end of this thesis is equaiont made of both parts.

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10

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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11

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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12

Knor, Pavel. "Teplotní pole pryžového tlumiče zážehového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229439.

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The main aim of this master’s thesis is to design the drivetrain of four-cylinder gasoline internal combustion engine with torsional vibration rubber dumper. For the basic parameters of the engine are designed two optional crankshafts. Crankshaft with eight counterweights and crankshaft with four counterweights. The thesis also includes modal analysis of the crankshaft using FEM, and design of the main dimensions of the dumper. The following part describes the calculation of force torsional vibration and safety factor solution of crankshaft fatigue using FEM. The final calculation is of the temperature field in the rubber dumper in selected operating modes.

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13

Bauza, Erik. "Pryžový tlumič torzních kmitů čtyřválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228974.

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A content of this diploma thesis is construction design of torsional vibration rubber damper of four-stroke diesel supercharged engine. It` s realized evaluation of crankshaft from aspect of torsional vibrations and checked mechanical stress of crankshaft without using rubber damper. Consequently basic parameters of rubber damper are specified, then checked mechanical stress of crankshaft and designed own construction design of damper.

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14

Drozdek, Lukáš. "Silikonový tlumič torzních kmitů řadového šestiválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228281.

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This thesis "Silicone damper of a six-cylinder in-line diesel engine " is focused on the proposal of alternative using of silicone damper for the a six-cylinder in-line diesel engine, which is made for tractors and other industrial aplications. The aim of this thesis is to count the oscilation of crankshaft by the help of appropriate dynamic model, then to propose such a basic parameters of silicone damper, which absorbes torsion blip crankshaft to acceptable value. The next part of my thesis is proposal of the constructive implementation of fixation the silicone damper on the free part of crankshaft. The last part of my thesis is comparing and evaluating the oscilation of crankshaft without a dumper and with a new propsal of the silicone damper.

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15

Poláček, Milan. "Modální vlastnosti klikového ústrojí šestiválcového traktorového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229637.

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Tato diplomová práce uvádí dynamiku klikového mechanismu šestiválcového řadového motoru za účelem návrhu klikového hřídele v CAD programu Pro/Engineer. Následuje popis vibrací klikového mechanismu a analytický výpočet jeho torzních vibrací. Hlavní část diplomové práce se pak zabývá konverzí hřídele do konečno-prvkového modelu v programu ANSYS a jeho importem do prostředí Adams/Engine. V tom je provedena modální analýza klikového ústrojí pro získání vlastních frekvencí a tvarů. Na konec práce je porovnán výstup z analytického řešení a výsledky z multi-body systému.

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16

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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17

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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18

Sedlák, Aleš. "Návrh pryžového tlumiče vznětového řadového čtyřválce." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-227895.

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Design of a rubber damper for 4-cylinder in-line CI-engine is this aim of this thesis diploma. Thesis consists from several parts. First part describes technical solutions of dampers of torsional vibrations. Second part contains torsional vibrations analysis of crankshaft without damper. The last part of this thesis describes design of rubber damper and torsional vibrations analysis of crankshaft with damper.

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19

Štefaňák, Petr. "Pětiválcový řadový vznětový motor s vyvažovací jednotkou." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229887.

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The purpose of this work is design of a five-cylinder in-line diesel engine with the given initial parameters. The work will be analyzed by balancing the engine, remove the effects of unbalanced masses by the unbalance of the crankshaft and separate balancing unit. It will also be analyzed driveline torsion vibration, followed by reducing the effects of torsion vibration by using rubber torsion vibration dampers. At the conclusion will be modal and stress analysis of the crankshaft using the FEM program.

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20

Balash, Ievgen. "Tříválcový řadový zážehový motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231050.

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The main aim of this master’s thesis is to design the powertrain of turbocharged threecylinder in-line gasoline engine based on given parameters. The work introduces three variants of balancing of inertia moment of rotating masses and balancer unit of first order moment of inertia of reciprocating parts. The thesis also presents calculation of torsion vibration of the powertrain and structural design of the rubber damper. In conclusion a stress analysis of the crankshaft is submitted with and without torsion vibration damper.

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21

Navrátil, Zdeněk. "Pětiválcový řadový vznětový motor s vyvažovací jednotkou." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229671.

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his diploma work themed: Five-cylinder in-line Diesel engine with balancing unit is dealing with analysis of balancing possible alternatives of arranging crankshaft, analysis of arranging counterweight, concept of balancing shaft, engineering design of crank-shaft, calculation of frequency, computational control of crank-shaft in light of torsional oscillations and proposal of dynamic pendulum damper.

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22

Wu, Feng-Sheng, and 吳逢昇. "Torsional vibration analyses of a damped shafting system using tapered shaft element." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/54924335320126715542.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>98<br>This paper presents a tapered shaft element such that the torsional vibration characteristics of a damped shafting system can be easily determined with effect of continuous non-uniformity of the shaft cross-sections being considered. To this end, the shape functions of the tapered shaft element are firstly derived. Then, the stiffness and mass matrices of the last shaft element are determined by means of the Lagrange’s equations. To confirm the reliability of the presented theory, the numerical results obtained from the presented technique are compared with those obtained from a limiting case and good agreement is achieved. Finally, the torsional vibration analysis of a hybrid (tapered) shaft, composed of multiple uniform and tapered shaft segments and carrying multiple disks, is performed to show the applicability of the presented technique. Influence of some relevant parameters, such as damping coefficient, slope of tapered shaft and total number of disks attached to the shaft, on the first five eigenvalues of a torsional shafting system is also investigated. Because the torsional vibration characteristics of a shafting system are important information for the engineers, the presented technique will be significant in practical applications.

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23

Liu, Su-Yu, and 劉素妤. "Vibration Control of Torsionally-Coupled Base-Isolated Structures Using Tuned Mass Dampers." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/22696395475374710449.

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碩士<br>國立中興大學<br>土木工程學系所<br>100<br>This study deals with the practical design consideration and vibration control effectives of tuned mass damper (TMD) for torsionally-coupled base isolated structures under ground motions. The optimal parameters of TMD are determined by minimizing mean-square displacement response ratio contributed by the first three modes of controlled degree-of-freedom between the structures with and without TMD. A planar base-isolated structure under four selected ground motions is firstly simulated. The effectiveness of the TMD under different eccentricities of the primary structure is then discussed. A reduction of approximate 30% in base displacement and structure absolute acceleration of root mean square (RMS) under soft soil ground motion record. However, a reduction of approximate 15% in base displacement and structure absolute acceleration of root mean square (RMS) under firm soil ground motion records. The TMD is effective when the base isolated structure and the soft soil ground motion. However, the effectiveness is not obvious under firm soil ground motion, because of the well performance of the base isolation system.

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24

Chi, Hsing-Tsan, and 吉星燦. "Prediction of the torsional vibration characteristics ofa damped rotor-shaft system from those of its scale model." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/31402777399044292085.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>99<br>This paper presents the scaling laws that provide the geometry and dynamic similitude conditions between the damped rotor-shaft system and its scale model, so that the torsional vibration characteristics of the full-size rotor-shaft system can be predicted from those of its scale model. The last scaling laws are determined from the equations of motion of the full-size rotor-shaft system and its scale model. Then, the scaling factors, that establish the relationship between the last two systems, involved in the preceding scaling laws (i.e., explicit scaling factors) are determined according to the fundamental physical properties of each scalable parameter of the system, while those not involved in the scaling laws (i.e., the implicit scaling factors) are determined based on the theory of dimensional analysis. Both the free and forced torsional vibration characteristics of the full-size rotor-shaft system and those of its scale model are used to validate the presented scaling laws and scaling factors.

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25

Chen, Bor-Ren, and 陳博仁. "Vibration Reduction of Torsionally-Coupled Buildings under Bi- Directional Earthquakes Using Passive Tuned Mass Dampers." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/26164311108033346421.

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