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The Steady-state Responses and Critical Velocities of the Infinite Beams on a Viscous Foundation for a Moving Load

Author: ZhenBin
Tutor: XieWeiPing
School: Wuhan University of Technology
Course: Structural Engineering
Keywords: Steady-state response Critical speed Resonance frequency
CLC: U213.21
Type: Master's thesis
Year: 2005
Downloads: 194
Quote: 2
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Abstract


Rail transport has developed into one of the world 's main form of public transport for more than a century . Over the past decade , the countries of the world , such as Europe, Japan , China , have been built or are being built to a large number of subway and high-speed railway . Research railway track vibration in the role of high-speed trains have a very important practical significance for traffic engineering analysis of A train movement loading induced wave propagation in orbit to prevent the destruction of the track , is also necessary to ensure the safe operation of the train . Railroad rails , generally using the Bernoulli-Euler beam and Timoshenko beam modeling To simplify the problem , first consider the role of a single moving load . This article analyzes the infinitely long beam under moving loads steady dynamic response and critical speed . Specific work as follows : 1 . Infinite Bernoulli-Euler beam system dynamic response analysis , the use of the residue theorem has been no self- vibration uniform steady dynamic response of infinitely long beam under moving loads analytical expression . 2 . Detailed comparative analysis of the difference between the case of undamped and damped dynamic response of an infinitely long Bernoulli-Euler beam system . The conclusion can be directly applied to the Timoshenko beam . 3 . Explore the infinite Bernoulli-Euler beam and Timoshenko of Liang Zhongbo the nature of free vibration . Explore the relationship between the infinite Bernoulli-Euler beam and Timoshenko beam critical speed and resonance frequency . And obtain the critical speed and resonance frequency gives the corresponding physical explanation .

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CLC: > Transportation > Rail transport > Railway Line Project > Line constructed > Track > Theory of track structure , track design
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