基于ADAMS钢板弹簧多体动力学模型的参数辨识

Parameter identification on the multi-body dynamics model of leaf spring based on ADAMS

应用离散梁原理在ADAMS中建立钢板弹簧的动力学模型。为适用于整车仿真,建立两片的钢板弹簧模型代替原有的多片模型。运用ADAMS中的试验设计模块ADAMS/Insight分析Beam梁参数,辨识影响刚度特性的主要参数,并以分析得到的参数作为设计变量,在ADAMS中进行优化,使其满足设计刚度。在满足刚度设计要求的前提下,对钢板弹簧的迟滞效应进行模拟。使用ANSYS建立钢板弹簧的有限元模型,模型考虑簧片间的摩擦,仿真得出了钢板弹簧在加载与卸载过程中的位移曲线,为钢板弹簧动力学模型的迟滞模拟提供了目标曲线。研究表明,经参数辨识后得到的钢板弹簧模型能准确反映其动力学性能,适用于整车仿真。

Discrete beam theory was used to set up the dy- namic model of leaf spring based on ADAMS. In order to apply in full vehicle simulation, two leaves model was built to replace the original ten leaves one. ADAMS/Insight module was used to analyze the parameters of beam, and main parameters which have sig- nificant influence on leaf spring stiffness were identified. These parameters obtained from analysis were used as design variables. Op- timization design was performed in ADAMS so that the leaf spring stiffness meets the design stiffness. Under the premise of meeting the design stiffness, the hysteresis characteristic of leaf spring was simulated. The finite element model of the leaf spring was built using ANSYS software and the model has considered the friction between leaf springs, then displacement curves of loading and un- loading process was presented, which provided target curves for hysteresis simulation of the dynamics model of leaf spring. The study shows that the leaf spring model can accurately reflect its dynamics performance after parameter identification; it is suitable for full vehicle simulation.