车辆非线性随机响应的统计线性化研究

STATISTICAL LINEARIZATION STUDY ON NONLINEAR RANDOM RESPONSE OF VEHICLE

建立了计及悬架系统钢板弹簧刚度和减振器阻尼非线性的整车八自由度模型。用统计线性化方法求出了系统在路面随机激励下的响应 ,并将计算结果与实验值和时域法模拟结果进行了比较。结果表明统计线性化方法与实验值吻合较好 ,比时域法的精度高 。

A 8 DOF (degree of freedom) vehicle model is established in which the nonlinear stiffness and damping are taken into account. The response of vehicle to random excitation of ground is calculated by using statistical linearization method. Comparing the calculating results with the experiment results and simulation results in time domain, it demonstrates that statistical linearization method for solving vehicle nonlinear vibration problem is effective. Its result is in good accordance with the experimental result and is more accurate than that with the method in time domain.