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Dissertations / Theses on the topic 'Dynamic characteristics of the rotor'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Mat, Isa Ahmad A. "An investigation of the dynamic characteristics of a bolted-rotor system." Thesis, Aston University, 2001. http://publications.aston.ac.uk/11837/.

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A Jeffcott rotor consists of a disc at the centre of an axle supported at its end by bearings. A bolted Jeffcott rotor is formed by two discs, each with a shaft on one side. The discs are held together by spring loaded bolts near the outer edge. When the rotor turns there is tendency for the discs to separate on one side. This effect is more marked if the rotor is unbalanced, especially at resonance speeds. The equations of motion of the system have been developed with four degrees of freedom to include the rotor and bearing movements in the respective axes. These equations which include non-l

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2

Yang, Baozhong. "On the characteristics of fault-induced rotor-dynamic bifurcations and nonlinear responses." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/1135.

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Rotor-dynamic stability is a very important subject impacting the design, control, maintenance, and operating safety and reliability of rotary mechanical systems. As rotor-dynamic nonlinearities are significantly more prominent at higher rotary speeds, the demand for better and improved performance achievable through higher speeds has rendered the use of a linear approach for rotor-dynamic analysis both inadequate and ineffective. To establish the fundamental knowledge base necessary for addressing the need, it is essential that nonlinear rotor-dynamic responses indicative of the causes of n

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3

Nováková, Naděžda. "Dynamické radiální síly působící na oběžné kolo odstředivého čerpadla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230329.

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This thesis deals with the radial forces acting on the impeller of a centrifugal pump. It focuses on the centrifugal pump type BETA 26. It addresses forces acting on the pump shaft. These forces are converted into the impeller. The most extensive part of this thesis is devoted to the experimental measurement and evaluation. The results are summarized and processed graphically.

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4

Arisi, Allan Nyairo. "Heat Transfer and Flow Characteristics on the Rotor Tip and Endwall Platform Regions in a Transonic Turbine Cascade." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/64501.

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This dissertation presents a detailed experimental and numerical analysis of the aerothermal characteristics of the turbine extremity regions i.e. the blade tip and endwall regions. The heat transfer and secondary flow characteristics were analyzed for different engine relevant configurations and exit Mach/Reynolds number conditions. The experiments were conducted in a linear blowdown cascade at transonic high turbulence conditions of Mexit ~ 0.85, 0.60 and 1.0, with an inlet turbulence intensity of 16% and 12% for the vane and blade cascade respectively. Transient infrared (IR) thermography t

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5

Біденко, І. Г. "Імовірнісний підхід до визначення основних характеристик системи "ротор-шпаринні ущільнення" відцентрового насоса. Вплив імовірнісного характеру параметрів системи "ротор-шпаринні ущільнення" на вібраційні характеристики відцентрового насоса". Master's thesis, Сумський державний університет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/71068.

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Робота присвячена дослідженню силових гідродинамічних факторів, що виникають під час течії рідини в циліндричних дроселюючих каналах ущільнень відцентрових машин. Ротор і ущільнення розглядаються при цьому як замкннена гідромеханічна система, у якій роль зв’язуючої ланки виконує перекачуване середовище, його інерційні і гідродинамічні характеристики. Вплив середовища особливо істотний при наявності великих градієнтів швидкостей і тисків. Такі умови саме і характерні для малих зазорів шпаринних ущільнень, на яких дроселюються великі перепади тиску, а одна зі стінок належить ротору, що о

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6

Гулий, Олександр Миколайович, Александр Николаевич Гулый, Oleksandr Mykolaiovych Hulyi, and S. V. Tokarev. "Rotor dynamic forces." Thesis, Видавництво СумДУ, 2004. http://essuir.sumdu.edu.ua/handle/123456789/22937.

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7

Беда, Олександр Іванович, Александр Иванович Беда та Oleksandr Ivanovych Beda. "Динамічні характеристики ротора відцентрового насоса з урахуванням особливостей гідродинамічних процесів в шпаринних ущільненнях довільної довжини". Thesis, СумДУ, 2015. http://essuir.sumdu.edu.ua/handle/123456789/41750.

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У дисертаційній роботі виконано уточнення математичної моделі шпаринного ущільнення з урахуванням спірального руху робочої рідини, обумовленого як обертанням валу так і полем тиску рідини в шпарині. Розроблено аналітичний метод розрахунку в лінійній постановці складових радіальної сили. Проведено аналіз нелінійності гідростатичної сили, обумовленої радіальним зміщенням валу. Отримано, що дана сила має м’яку характеристику жорсткості. Проведений фізичний експеримент, який дав змогу оцінити вплив окружних перетоків рідини на величину гідростатичної сили. У відносно довгих шпаринах експерименталь

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8

ElHibir, Sandi. "Dynamic Analysis Of A Rotor Bearing System." Cleveland State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=csu1245868731.

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9

Samuelsson, Joakim. "Rotor dynamic analysis of 3D-modeled gas turbinerotor in Ansys." Thesis, Solid Mechanics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19071.

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<p>The world we are living in today is pushing the technology harder and harder. The products need to get better and today they also need to be friendlier to the environment. To get better products we need better analysis tools to optimize them and to get closer to the limit what the material can withstand. Siemens industrial Turbomachinery AB, at which thesis work is made, is constructing gas and steam turbines. Gas and steam turbines are important in producing power and electricity. Electricity is our most important invention we have and most of the people are just taking electricity for gra

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10

Krothapalli, Krishnamohan Rao. "Helicopter rotor dynamic inflow modeling for maneuvering flight." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/12066.

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11

Choy, Jose. "Wankel engine dynamic supercharging and surface rotor cooling." Thesis, University of Birmingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.497868.

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12

ALAMO, FREDY JONEL CORAL. "DYNAMIC OF A VERTICAL OVERHUNG ROTOR WITH IMPACT." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=3640@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Neste trabalho um modelo dinâmico para um rotor vertical em balanço, considerando o fenômeno de contato com a sua guarda, é analisado. A conjunto é modelado como um sistema eixo-rotor-estator com contato. A análise do contato é particularmente complexa pela não linearidade nas equações de movimento. O impacto com o estator é levado em conta através do modelo de contato tipo Kelvin-Vôigt, e, as equações de movimento, do rotor, são deduzidas através da formulação Lagrangeana; estas equações podem capturar os fenômenos devid

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13

Viitala, R. (Risto). "Dynamic radial bearing force measurement of flexible rotor." Master's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201809062733.

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Dynamic characteristics of a paper machine roll have been widely investigated for decades. Vibration of the rolls decrease the paper quality and excites the structures of the paper machine. Therefore, vibration must be avoided and kept at its minimum. Vibration of a rotor develops periodic radial bearing forces, which are connected to the amplitude and the frequency of the vibration. Vibration based forces are unnecessary dynamic forces, which increase the bearing load in addition to unavoidable rotor mass and the external loads of the process. This experimental study presents the amplitudes o

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14

Ellenrieder, Thomas Jochen. "Investigation of the dynamic wake of a model rotor." Thesis, University of Bristol, 1995. http://hdl.handle.net/1983/13c5bb18-5952-41ae-ba03-08d8d2040d12.

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In this study the dynamic induced velocity field of a model helicopter rotor - excited in collective and cyclic pitch at frequencies extending to 1.5 times the nominal shaft speed - is investigated using mainly hot-wire and laser Doppler anemometry. The dynamic induced velocities are found to vary significantly with radial station and frequency. For cyclic excitations, azimuthal variations are also observed. The results point to the dynamic induced flow being influenced by the distribution of shed vorticity in the wake and cannot be explained using simple momentum theory. Vertical variations o

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15

Casey, Cody. "Crack detection in a rotor dynamic system by vibration monitoring." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17838.

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16

Ogrodnik, Peter Jan. "Operation of rotor-bearing systems subject to dynamic conical misalignment." Thesis, Open University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330280.

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17

Alsaeed, Ali A. "Dynamic Stability Evaluation of an Automotive Turbocharger Rotor-Bearing System." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32502.

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This project was initiated to more fully understand the dynamic stability of an automotive turbocharger rotor-bearing system using both linear and nonlinear analyses. The capabilities of a commercial Finite Element Analysis (FEA) code (computer program) were implemented in the investigation process. Several different hydrodynamic journal bearings were employed in the study of the turbocharger linearized dynamic stability. The research demonstrates how the linear analysis of a turbocharger rotordynamics can be very beneficial for the design evaluation and maintenance purposes.<br>Master of Scie

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18

Perdikologos, Nikolaos Carleton University Dissertation Engineering Mechanical. "Dynamic analysis of flexible disc-rotor systems using component modes." Ottawa, 1985.

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19

SHARMA, ANUJ. "DEVELOPMENT, CHARACTERIZATION AND DYNAMIC ANALYSIS OF METAL MATRIX COMPOSITE ROTOR." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18893.

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Industrial development is one of the pioneer enablers of the economic and social prosperity of any nation. High efficiency, low cost and reliable system are the most critical factors that are focussed by industries. New developments in this direction are observed in the past few decades. Researchers thrive for new inventions and technologies by which high-quality output can be attained with effective and robust systems. Materials play an essential role in achieving high efficiency by providing an outcome-based response to any process. With the advent of composite materials, industries ha

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20

Colombo, Francesco. "Service-like thermo-mechanical fatigue characteristics of 1CrMoV rotor steel /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17070.

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21

Guo, Jenq-Shan. "Characteristics of the nonlinear hysteresis loop for rotor-bearing instability." Case Western Reserve University School of Graduate Studies / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=case1062688989.

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22

Vaishya, Manish. "Vibro-acoustic characteristics of sliding friction in geared rotor systems /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486394475977383.

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23

Karlsson, Stefan, and Erik Hansson. "Dynamic Load Generator: Synthesising dynamic hardware load characteristics." Thesis, Mälardalens högskola, Inbyggda system, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-28280.

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In this thesis we proposed and tested a new method for creating synthetic workloads. Our method takes the dynamic behaviour into consideration, whereas previous studies only consider the static behaviour. This was done by recording performance monitor counters (PMC) events from a reference application. These events were then used to calculate the hardware load characteristics, in our case cache miss ratios, that were stored for each sample and used as input to a load regulator. A signalling application was then used together with a load regulator and a cache miss generator to tune the hardware

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24

Oh, Jongseok. "Dynamic characteristics of inclined cable." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26732.

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This thesis aims to investigate dynamic characteristics, especially the natural in-plane vibrations, of a perfectly flexible elastic suspended cable. A finite element procedure using the linear elastic rod as cable elements is formulated and a program implemented in Matlab is developed to determine natural frequencies and mode shapes. Results show how the properties of inclined cables meaningfully differ from those of horizontal cables. Influence of cable inclination induces the mixture of mode shapes through the transition range and the region of non-contact crossings of frequency. These phen

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25

White, M. J. "Dynamic characteristics of infilled frames." Thesis, University of Bradford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355241.

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26

He, Jimin. "Identification of structural dynamic characteristics." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47105.

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27

Camelo, Vanessa Beck J. L. "Dynamic characteristics of woodframe buildings /." Diss., Pasadena, Calif. : California Institute of Technology, 2003. http://resolver.caltech.edu/CaltechEERL:EERL-2003-04.

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28

Hashemi-kia, Mostafa. "Dynamic testing techniques and applications for an aeroelastic rotor test facility." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/13887.

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29

Kalita, Karuna. "Integrating rotordynamic and electromagnetic dynamic models for flexible-rotor electrical machines." Thesis, University of Nottingham, 2007. http://eprints.nottingham.ac.uk/13895/.

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The magnetic field within electrical machines causes an interaction between the electrical and mechanical dynamics of the system. In the simplest cases, when the rotor mean position is central in the stator, the interaction manifests itself mainly as a negative stiffness between the rotor and the stator. When the rotor mean position is offset relative to the stator, then components of force arise whose frequency in the stationary frame is twice the electrical frequency of the supply. For induction machines in particular, both the electrical system and the mechanical system may be quite complex

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30

McCallum, Duncan C. (Duncan Craig). "Dynamic modelling and control of a magnetic bearing-suspended rotor system." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14554.

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31

Wu, Ming-Chuan, and 吳明川. "Dynamic Characteristics of Rotor Systems Containing Cracked Components." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/86259978119560847027.

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碩士<br>國立台灣工業技術學院<br>機械工程技術研究所<br>85<br>The dynamic behaviors of cracked rotating components (shaft and blade)of rotor systems were investigated. With the crack released energy, thelocal flexibility due to crack was evaluated. An energy principle inconjunction with the assumed- modes method or the weighted residual methodwere applied to yield the discrete equations of motion. In this paper, three different topics with cracked shaft and crackedblades were discussed, numerical examples were

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32

Chun-LinChen and 陳春霖. "Dynamic Characteristics Analysis on Rotor System with Soft Supports." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/38104538988149551398.

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33

Chang, Jer-Rong, and 張哲榮. "A Study on Dynamic Characteristics of Geared Rotor-Bearing System." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/83738202872182721874.

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博士<br>國立成功大學<br>航空太空工程學系<br>85<br>This thesis is concerned with the dynamic analysis of a geared rotor-bearing system. A finite element model of the geared rotor-bearing system is developed by taking account of the lateral-torsional coupling effect to obtain the natural frequencies, mode shapes, and the steady-state responses. From the response time histories, the FFT spectra can be obtained to investigate the effects of dynamic coupling terms under different grades of balance quality and s

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34

Lo, Wu-Jen, and 羅武仁. "Dynamic Characteristics Analysis and Testing of a Microturbine Rotor-Bearing System." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/61932283777594980230.

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碩士<br>國立清華大學<br>動力機械工程學系<br>91<br>This paper can be divided into two parts, which are numerical analysis and experimental equipment construction and testing. In numerical analysis, we mainly use the finite element method as our basis and MATLAB program design software as our tool, to write the numerical analysis program for a rotor-bearing system. This rotor-bearing system consists of rigid disks, distributed parameter finite rotor elements, and discrete bearings. During modeling of the system, the finite element model includes the effects of translation inertia, rotatory inertia, g

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35

Huang, Chun-Jung, and 黃俊榮. "A STUDY ON DYNAMIC CHARACTERISTICS OF GEARED ROTOR-BEARING SYSTEM WITH CRACK." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/58896036507200956668.

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博士<br>國立成功大學<br>航空太空工程學系碩博士班<br>91<br>In this thesis, the dynamic analysis of a geared rotor-bearing system with an open crack or a breathing crack is discussed. A simple analytic model of a geared rotor system is developed by taking into account the effect of an open transverse surface crack for determination of natural frequencies, critical speeds, and stability of the system. The existing crack results in a local flexibility of the shaft and it is replaced by a set of springs based on the balance of energy. The effect of the crack results in a periodic time-varying system. From the response

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36

Mokhtar, Md Asjad. "Rotordynamic studies on the rotor-stator contact interaction." Thesis, 2018. http://eprint.iitd.ac.in:80//handle/2074/7957.

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37

Yang, Ding-Wen, and 楊丁文. "The Studies of Static/Dynamic Characteristics and Stability in Rotor-aerostatic Bearing System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/44533345787232415616.

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博士<br>中原大學<br>機械工程研究所<br>97<br>Abstract This project has dealt with the integrated research of the spindles with aerostatic bearings. The contents include studies in load capacity, stiffness, damping ratio, critical inertial force, critical whirl ratio for aerostatic-bearing spindle, analysis for simulating the influences of design parameters in operation performances and characteristics and optimal design for aerobearing-spindle system. The Reynolds equation is solved by the finite difference method and numerical integration to yield static and dynamic characteristics of air film. The motion

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38

Guan, Zhi-Pin, and 官志彬. "Dynamic Characteristics Analysis and Testing of a Turbo Molecular Pump Rotor-Bearing System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/43607223254418828101.

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Hsu, Wei Chun, and 徐煒峻. "A STUDY ON DYNAMIC CHARACTERISTICS OF NONLINEAR ROTOR SYSTEMS MOUNTED WITH HYDRODYNAMIC THRUST BEARINGS." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/61974295698512921385.

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博士<br>國立中正大學<br>機械系<br>93<br>The dynamic response and characteristics of a hydrodynamic thrust bearing-mounted rotor is investigated when the rotor is subjected to a constant or harmonic axial force. There have been researches, which point out the significant effects of the thrust bearing on the rotor lateral vibration. Thus the coupled axial and lateral vibration of a hydrodynamic thrust bearing-mounted rotor system is investigated in this study. The thrust bearing is considered with three hydrodynamic oil films, one in the journal part of the thrust collar and two on both sides of the thrust

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Chou, Yu-Wei, and 周有偉. "A Study on the Dynamic Characteristics of Geared Rotor-Bearing System with Hybrid Method." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/00618026860554916231.

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碩士<br>國立成功大學<br>航空太空工程學系<br>81<br>A new technique called Hybrid Method is proposed in the analysis of the geared rotor-bearing system. This technique combines the Finite Element Method and the Generalized Polynomial Expansion Method to formulate the system equations of motion. The compliance and shear deformation of the shaft element, flexibility and damping of the bearings, stiffness and damping and pressure angle of the gear mesh are considered. The coupling between the torsional and late

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41

Lin, Hong-Yi, and 林鴻義. "Static and Dynamic Characteristic Analysis of Rotor－ Journal Bearing Systems Using Multigrid Method." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/34103105853821499248.

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Lin, Hong Yi, and 林鴻義. "Static and Dynamic Characteristic Analysis of Rotor－ Journal Bearing Systems Using Multigrid Method." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/57178994992806180435.

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碩士<br>國立中山大學<br>機械工程研究所<br>84<br>In the study, the multi-grid method is used to solve static and dynamic characteristics of rotor-journal bearing system. First, the film pressure distribution is obtained from the average Reynold's equation, and then the static characteristics such as load parameter and attitude angle are obtained by using Simpson' s integration rule.Moreover, the finite disturbance method is employed to obtain the stiffness coefficients and damping coefficientswhich are the

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Liao, Chen-Yung, and 廖振暘. "Dynamic Characteristic Analysis of a Rotor Bearing System Using Global Assumed Mode Method with Different Polynomial Function." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/40316725095172112341.

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碩士<br>國立中正大學<br>機械工程所<br>98<br>In this study, the dynamic behaviors of a multi shaft rotor-bearing system are investigated. The rotor-bearing system consists of rotating multi elastic shaft, rigid disks and the associated bearings are of damping and stiffness effects. In the paper, will study the practical application of a domestic high speed rotor bearing system in turbo machines, to analyze its the whirl speeds, critical speeds, mode shape and steady state unbalance response etc. In consideration of the rotor system is a combination of multiple components, and a multi-shaft to simulate the m

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44

Shih-Jiui-Ching and 施瑞清. "Study on the Dynamic Characteristics of a Uniform Shaft Carrying a Number of Elastically-Mounted Rotors." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/22637968583276781175.

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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>103<br>For conveniences， a shaft carrying a number of elastically-mounted rotors (such as flywheels) is called elastically rotor-shaft system， while that carrying rigidly-attached rotors (such as disks) is called rigidly rotor-shaft system. This paper presents the theory of equivalent rigidly-attached rotor such that the torsional vibration characteristics of the elastically rotor-shaft system can be predicted from the corresponding ones of the equivalent rigidly rotor-shaft system. To validate the presented theory， the numerical results obtained from the equival

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45

Singh, Ved Prakash. "Studies on Effect of Rotor Crack on Dynamics Characteristic Using Numerical Methodology." Thesis, 2017. http://ethesis.nitrkl.ac.in/9063/1/2017_MT_VPSingh.pdf.

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In present work, dynamic analysis of cracked rotor is presented with a generalized formulation. After formulating the problem, dynamic analysis is conducted to find natural frequencies and dynamic response. Initially, transfer matrix approach was used with an interactive computer program. By using the field and point matrices of the shaft, bearing, disk, and crack, the resultant transfer matrix is obtained. A single crack on an element is considered in terms of stress intensity factor. Natural frequencies, mode shapes and response of the system are obtained at various crack depths. Results are

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46

Chen, Yu-Tso, and 陳囿佐. "Microturbine Rotor Dynamic Testing Study." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/12860011628800482074.

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碩士<br>國立清華大學<br>動力機械工程學系<br>93<br>Abstract The object of the investigation is to develope a method of vibration testing on Microturbine rotor. We build this method with two major parts - hardward setting and softward deading to erect a standard process of testing and discuss, and discuss about the advantage and disvatage on it, finally. Structure vibration analysis is the basic theory of discussing the question of rotor vibration with time domain and frequency domain analysis. We make the discussion on the principle and daily choice with windows function to the question that the signal dealt w

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PAN, YUH-WEN, and 潘育文. "Dynamic Analysis of Cracked Rotor Systems." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/07562441580335938890.

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碩士<br>國立成功大學<br>航空太空工程學系<br>83<br>Dynamic characteristics of cracked rotor systems is investigated in this thesis by the transfer matrix method. Shaft element with distributed mass is modeled based on the Timoshenko beam theory. Surface transverse cracks are modeled as a set of local springs, from which the local flexibilities are calculated by using the fracture mechanics approach. Disk elements are assumed to be rigid with gyroscopic effect taken into account. Bear

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Liu, Kun-Lin, and 劉坤麟. "Dynamic Optimization for Rotor-Bearing System." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/20114559092639091949.

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碩士<br>中原大學<br>機械工程研究所<br>89<br>ABSTRACT During the processes of upgrading transformation, some stress or deformation results of machines cannot be calculated by some theoretical equations; therefore, accumulated experience or actual experiment overcomes are needed. Under competitive pressures of the high-speed developing industry, one of necessary skills for designers is to effectively utilize Computing Auxiliary Engineering (CAE) to shorten the period of design and analysis in order to finish the prototype earlier and raise the productivity. In this article, the use of CAE on design and analy

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Mishra, Samarth. "Dynamic Stress Analysis of Viscoelastic Rotor." Thesis, 2015. http://ethesis.nitrkl.ac.in/6809/1/Dynamic_Mishra_2015.pdf.

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The present work deals with the study of stresses in viscoelastic rotor which are dynamic in nature. Due to internal damping of the rotor material, dynamic characteristics get affected and hence it is studied to understand the behavior in terms of Campbell plot, mode shapes etc. This study starts with modelling of beam, where viscoelastic material was considered. The solution for time domain was obtained through state space approach. For discretizing the continuum finite element method is used based on Euler Bernoulli beam theory. Then stresses were found for cantilever beam. This modelling wa

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Chang, HungWen, and 張鴻文. "The Dynamic Analysis of Coupled Rotor System With Dynamic Stall." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/82081079710850066182.

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碩士<br>淡江大學<br>航空太空工程學系<br>89<br>For a rotor blade in forward flight, a high angle of attack often is encountered in normal operating conditions. If the angle of attack of the blade sections becomes large enough, dynamic stall may occur. Typically, this occurs on the retreating blade. In a hovering rotor, the dynamic stall may occur on blade tip area due to its abrupt motion. At this area, a large hysteresis in the force can arise and lead to a negative pitch damping. This aerodynamic nonlinearity then must be considered. In this research, a new three-dimensional dynamic wa

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