摘要
在输入信息不完整状态下,为了获得更多输出信息和更加接近工程实际的车辆悬架动力学模型,将未确知理论引入车辆传统悬架振动模型中进行研究。将质量、刚度、阻尼作为未确知量,运用未确知理论、振动状态方程理论、矩阵迭代法建立悬架未确知动力学模型,进而获得动力响应规律。分别将悬架未确知动力学模型研究结果和传统模型计算结果与蒙特卡罗法模拟结果进行比较。结果表明:未确知动力学模型振动位移方差期望值与蒙特卡罗法获得期望值之间的最大差值为0.5385mm^2;未确知动力学模型位移方差期望值与蒙特卡罗法获得期望值之间的相对差值比传统模型位移方差期望值与蒙特卡罗法获得期望值之间的相对差值总体上小0.36%~14.50%。本文结果证明未确知理论的引入可行且未确知动力学模型比传统模型更加优越。
In the condition of incomplete input information, in order to obtain the dynamic model of vehicle suspension which has more information and is more realistic than traditional one, the research is carried out through introducing the unascertained theory into the traditional dynamic model of vehicle suspension. The mass, stiffness and damping are defined as unascertained variables. The unascertained-dynamic model of vehicle suspension is established with the unascertained theory, the state equation of vibration and the matrix iteration method. And then, the laws of dynamic response are further obtained. The results of the unascertained-dynamic model and the traditional model are compared with those of the Monte-Carlo method. Results show that the maximum difference of vibration displacement variance expectation between the unascertained-dynamic model and Monte-Carlo method is 0.5385 mm^2. Generally, the relative difference of displacement variance expectation between the unascertained-dynamic model and Monte-Carlo method is about 0.36% to 14.5% less than that between the traditional model and Monte-Carlo method. The research shows that the introduction of unascertained theory is feasible and the unascertained-dynamic model is more excellent than the traditional one.
出处
《应用力学学报》
CSCD
北大核心
2017年第4期647-653,共7页
Chinese Journal of Applied Mechanics
关键词
车辆悬架
未确知理论
动力学模型
蒙特卡罗法
动力响应
vehicle suspension
unascertained theory
dynamic model
Monte-Carlo method
dynamic response
