基于MATLAB的車(chē)橋耦合動(dòng)力學(xué)分析
[Abstract]:With the rapid development of high-speed railway, the engineering demands on speed, safety and passenger comfort are becoming higher and higher. Considering the safety of train operation, it is necessary to control the foundation settlement. With the advantage of small settlement of its own foundation, more than 80% of the bridge construction is simply supported beam bridge. In the design of high-speed railway bridge, the dynamic response of high-speed train to bridge is different from that of ordinary train, which makes the bridge design of high-speed train different from that of ordinary train. Therefore, studying the dynamic effect of high-speed train on bridge has practical guiding significance for bridge design. The main contents of this paper are as follows: 1. First, the equation of motion balance of the mass system model of single axis spring is derived, then the equation is solved by Newmark method, and then the vehicle-bridge coupling analysis program is compiled. In this paper, a two-system suspension vertical vehicle model with 10 degrees of freedom is used. The governing equations of the vehicle-bridge coupling vibration model under the action of two pairs and n pairs of wheels are derived, and the MATLAB iterative solution program for the control equation of the vehicle-bridge coupled vibration model is developed. The random vibration characteristics of the system under different train velocities and different track irregularity are analyzed. It is concluded that the higher the irregularity interference spectrum is, the larger the modulation function coefficient is, and the greater the system response is. 3. Firstly, the harmonic excitation is discussed. The design of TMD optimization parameters for single degree of freedom vibration system. Then, a new system dynamic equilibrium equation is established, in which the action of train load on the structure of the main bridge is used as random excitation, and a new system dynamic equilibrium equation is established, which is composed of MTMD and the vibration control mode coordinates of the structure. MTMD, is designed to analyze the dynamic response of vehicle bridge system under the control of MTMD.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類(lèi)號(hào)】:U441.3;U270.11
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