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Study on Automobile Ride Comfort for a Long-span Suspension Bridge with Wind-induced Vibration

Author: WangFei
Tutor: DaiPing
School: Huazhong University of Science and Technology
Course: Structural Engineering
Keywords: Span suspension bridge Buffeting Fluctuating wind Quarter vehicle model Driving comfort
CLC: U441.3
Type: Master's thesis
Year: 2005
Downloads: 214
Quote: 3
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Abstract


Buffeting the bridge under the action of the natural wind a regular, random limiting vibrations. Although generally do not cause the bridge buffeting the overall damage, but if not handled properly , but also make bridges local fatigue failure of certain components , but too much buffeting amplitude will endanger traffic and pedestrian comfort and safety . Wind buffeting ride comfort under study is necessary. In view of this , this paper carried out the following aspects of work : 1. Firstly, using the finite element software ANSYS to establish a model for large -span suspension bridge , the bridge vibration characteristics were analyzed, and the bridge was built to test the computational model correctness , and secondly for static wind response analysis . And lists some of the results. Then the wind farm under this bridge which features simulated using the harmonic synthesis of fluctuating wind speed on the bridge schedule, based on quasi-steady aerodynamic theory, given a role in the entire unit length of bridges aerodynamic expression , and the simulation results were tested. In order to facilitate the bridges linear and nonlinear buffeting analysis in time domain , the authors prepared a buffeting response calculations. These procedures can be carried out on the bridge structure linear and nonlinear static and dynamic analysis of buffeting response . The final calculation of a suspension bridge in the 42 kinds of load cases buffeting response . Also lists some of the results. (2) to establish a \Dynamics using MATLAB programming for solving differential equations of acceleration time to strike people as below into the ISO standard to evaluate the vertical direction driving comfort preparation. 3 on the domestic and international major structural vibration comfort evaluation criteria and evaluation methods to do a more systematic summary . Summarizes the latest ISO standards apply to the content of specific evaluation of the research methods , also lists five kinds of ancillary uses spectral analysis method to evaluate the horizontal direction as a comparative analysis of ride comfort . By acting on the bridge fluctuating wind wind calculations, the bridge horizontal and vertical direction driving comfort make a comprehensive evaluation .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Bridge vibration and damping device
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