不同坡度对汽车机械厂房作用下的振动响应

Vibration Response of Different Slopes to the Action of Automobile Machine Shops

摘要: 本文通过实地三向测试来分析不同边坡对汽车机械厂房的振动响应，并用于验证模型的准确性。采用abaqus隐式动力有限元单元法建立边坡模型，研究了不同的坡度对于机械厂房的振动影响。以速度RMS作为响应标准，计算了不同坡度条件下的振动响应。在此基础上提取了模型部分监测点的频谱曲线，揭示了坡度对于单体边坡振动响应的定量作用规律。数值结果表明：在X和Y方向上，随着坡度增加到30˚时，从速度RMS上看有放大效应，应尽量避免；坡度增加到50˚时，X方向速度RMS最小，坡度增加到70˚时，Y和Z方向上最小；坡度由70˚继续增加至90˚时，三个方向的速度RMS都有所增加，Z方向上最明显，说明直角坡从减振效果不是最好选择。

Abstract: This paper analyzes the vibration response of different slopes on an automotive machine shop building through field three-way tests and is used to verify the accuracy of the model. The abaqus implicit dynamic finite element method was used to model the side slopes, and the vibration effects of different slopes on the machinery factory building were investigated. The vibration response under different slope conditions was calculated using velocity RMS as the response criterion. On this basis, the spectral curves of some monitoring points of the model were extracted to reveal the quantitative effect law of slope gradient on the vibration response of a single slope. The numerical results show that: in the X and Y directions, as the slope increases to 30˚, there is an amplification effect from the velocity RMS, which should be avoided as much as possible; the velocity RMS in the X direction is the smallest when the slope increases to 50˚, and it is the smallest in the Y and Z directions when the slope increases to 70˚; the velocity RMS increases in all three directions when the slope continues to increase from 70˚ to 90˚, and it is the most obvious in the Z direction, indicating that right-angle slope is not the best choice from the vibration damping effect.