转K7柔性副构架多体系统动力学建模研究

A Modeling Method of Rigid-flexible Coupling Dynamics for ZK7 Truck Considering Sub-frame's Flexibility

高速和重载是中国铁路发展的两个重要方向,铁道车辆的轻量化设计理念也被普遍采用。但轻量化设计却导致许多部件弹性变形比较明显,影响车辆动力学性能。以往将车辆各部件全部考虑成刚体的刚体动力学得出的结论与实际差距较大。因此,将弹性变形比较明显的部件考虑成柔性体,建立刚柔耦合的多体动力学模型来仿真是目前铁道车辆动力学的发展方向之一。以转K7转向架为例,详细分析介绍利用ANSYS和SIMPACK软件建立柔性副构架刚柔耦合动力学模型的建模思路和方法。

Chinese railway develops towards high speed and heavy load,and lightweight design is widely accepted,which causes obvious elastic deformation,affecting the vehicle＇s dynamic performance.The results of using the past vehicle＇s dynamic model based on considering all of the vehicle＇s parts to be rigid have great disparity with the practical results.Thus creating the rigid-flexible coupling dynamic model considering the elastic parts＇ flexibility is one of the railway vehicle＇s dynamic development direction.The paper introduces a modeling method of rigid-flexible coupling dynamic for ZK7 truck considering sub-frame＇s flexibility using ANSYS and SIMPACK.