随机激励三维路面空间域模型建模与仿真

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (21) : 68-72.

论文

随机激励三维路面空间域模型建模与仿真

罗竹辉,魏燕定,周晓军,杨富春,谢明祥

作者信息 +

3-D Random Excitation Road Surface Modeling and Simulation

LUO Zhu-hui , WEI Yan-ding , ZHOU Xiao-jun , YANG Fu-chun , XIE Ming-xiang

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文章历史 +

摘要

对比国标给定幂函数形式的路面功率谱密度，采用最小二乘非线性参数估计法对路面功率谱密度有理函数表达式中的参数进行估计，将一维路面功率谱扩展成二维功率谱，推导了三维路面建模的二维傅里叶逆变换法。在MATLAB中利用该方法和传统方法生成C级路面高程数据，将仿真得到的三维路面直线轨迹、弯曲轨迹高程进行采样后做功率谱估计，并与标准等级路面功率谱对比。结果表明：该方法生成高程数据快，得到的三维路面横向、纵向直线轨迹和弯曲轨迹路面高程具有相同的功率谱特性。

Abstract

According to the power spectrum density (PSD) of road roughness based on power function given by china standard organization, Parameters of PSD of road roughness based on rational function are estimated using nonlinear least-squares estimation. The 1-D PSD of road roughness is extended to 2-D PSD. The relationship between 2-D PSD and 2-D road roughness is presented. Road C is simulated in software MATLAB based on this method. The PSD of road elevation of straight and curve track in the 3-D road model is estimated and compared with standard PSD. The result shows that road elevation characteristics can be reappeared precisely and the speed of the simulation is faster than other method . The road model can be used for vehicle dynamic simulation.

导出引用

罗竹辉;魏燕定;周晓军;杨富春;谢明祥. 随机激励三维路面空间域模型建模与仿真[J]. 振动与冲击, 2012, 31(21): 68-72

LUO Zhu-hui;WEI Yan-ding;ZHOU Xiao-jun;YANG Fu-chun;XIE Ming-xiang. 3-D Random Excitation Road Surface Modeling and Simulation[J]. Journal of Vibration and Shock, 2012, 31(21): 68-72