摘要
轿车行驶中转向轮定位参数呈非线性变化,若其变幅过大将影响操纵稳定和轮胎磨损。以定型轿车为目标研究定位参数变化规律,可实现定位结构参数优化。剖析目标车型结构及动态特性,在Hypermesh限元网格划分前处理软件中建立有限元横摆臂并进行处理,导入ADAMS(automatic dynamic analysis of mechanical systems)机械系统动力学自动分析软件中的Car模块建立符合动态实体的前悬架三维刚柔耦合模型。设置边界条件导入ADAMS/car进行模拟试验,确定优化目标。根据前悬架侧滑理论,进行了双滑板侧滑试验,得到车辆侧滑量与前束值的函数关系,并利用多项式回归方法对其验证。得到最佳匹配的前束角与外倾角,调整初始定位参数并进行试验,试验结果表明:前束角变化量下降19.09%,外倾角变化量下降39.94%。
The positioning parameters of the steering wheel in the car are nonlinearly changed.If the steering wheel's parameter changes too large,the handling stability and tire wear will be affected.Study on the variation law of positioning parameters with the aim of stereotyped cars,the positioning structure parameters can be optimized.The structure and dynamic characteristics of the target vehicle was analyzed in this paper.The finite element lower-control arm was established in Hypermesh software and processed into ADAMS/car environment.Then,a three-dimensional rigid-flexible coupling model of the front suspension conforming to the dynamic entity was established.The boundary conditions were introduced into ADAMS/car for simulation test to determine the optimization target.According to the front suspension side slip theory,the double skateboard sideslip test was carried out,and the relationship between the vehicle side slip and the toe value was obtained.It was verified by the polynomial regression method.The best matching toe angle and camber angle were obtained,and the initial positioning parameters were adjusted and tested.The test results show that the toe angle change decreases by 19.09%and the camber angle decreases by 39.94%.
作者
孙银银
唐焱
唐荣江
SUN Yin-yin;TANG Yan;TANG Rong-jiang(School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China)
出处
《科学技术与工程》
北大核心
2020年第12期4948-4953,共6页
Science Technology and Engineering
基金
广西青年科学基金(2018GXNSFBA281012)。
