Optimal Design of Guiding Mechanism and Rubber Bushing Based on Riding Smoothness of Air Suspension
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摘要: 应用多体系统动力学理论,在ADAMS/View中建立了某卡车四连杆非独立空气后悬架的虚拟样机模型,以车架质心位置响应的加权加速度均方根值作为平顺性评价指标,对其进行了平顺性分析。在此基础上,以车架质心处垂向加权加速度均方根值最小为目标函数,建立了其优化设计模型。对其进行试验设计分析以后,选取四连杆导向机构中各杆件的长度及其连接件橡胶衬套的刚度和阻尼为设计变量,应用序列二次规划算法进行优化分析。结果表明,选择合适的导向机构结构参数及橡胶衬套来匹配悬架结构中的空气弹簧,可以有效地提高车辆的平顺性。Abstract: Based on the theory of multi-body dynamics, the virtual prototype model of four-link type dependent air suspension for a certain truck is established with the software ADAMS/View. We analyze the riding smoothness of the air suspension by using the total weighed mean square root value of the response acceleration at the frame mass center as the smoothness evaluation indicator. Then, its optimal design model is established by using the minimum weighted mean square root value of vertical acceleration at the frame mass center as the objective function. After ex-periments, design and analysis, we choose the length of the bar of the four-link guiding mechanism and the rigidity and damping of rubber bushing as design variables to optimize the air suspension with the sequential quadratic pro-gramming algorithm. The optimization results show that the selection of suitable parameters of the guiding mecha-nism and rubber bushing to match the air spring of the suspension can enhance its riding smoothness effectively.
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Key words:
- riding smoothness /
- guiding mechanism /
- rubber bushing /
- optimal design
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