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转K7型转向架轮对径向装置抗剪刚度设计

, PP. 48-53

Keywords: 车辆工程,转K7型转向架,轮对径向装置,抗剪刚度设计,动力学分析,有限元法

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Abstract:

针对转K7型副构架式自导向径向转向架,通过相关结构受力与刚度串并联关系分析,明确了决定其轮对径向装置抗剪刚度的几何和刚度参数,构建了抗剪刚度的数学计算公式。基于车辆系统动力学分析技术,确定了转K7型转向架轮对径向装置所需抗剪刚度为11MN?m-1。考虑转向架结构实际受限条件,对轮对径向装置各组成件的几何和刚度参数进行匹配设计。首先设计确定出对角斜撑角和连接杆轴向拉压刚度分别为42°和150MN?m-1,然后使用抗剪刚度数学计算公式导出所需的副构架结构横向刚度应不小于23.6MN?m-1,进而按该参数要求对副构架结构进行相应设计。考虑部件间接触配合关系,建立了轮对径向装置的高仿真非线性有限元装配体分析模型。计算结果表明结构横向刚度为24MN?m-1,达到了轮对径向装置抗剪刚度的设计要求;抗剪刚度为所需设计值11MN?m-1,验证了抗剪刚度数学计算公式和设计方法的可靠性。

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