基于ANSYS和ADAMS的观光车车架联合仿真

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In order to analyze more accurately the dynamic stress of sightseeing car frame,3D frame model has been established,with HYPERMESH software imported,middle surfaces extracted and the finite element model of sightseeing car frame generated.ANSYS modal analysis has been done to the frame and flexible-body neutral files（MNF files）has been exported.Considering the influence of road surface,tire and suspension to the force of sightseeing car frame,rigid-flexible body of the sightseeing car has been set up by ADAMS software,and the kinematics simulation of the carload has been done In D level road,ensuring some hot spots which have largest stress on rigid-flexible body and importing the load spectrum of every point which locates between sightseeing car frame and suspension.Transient response analysis has been done through importing the load spectrum in ANSYS software and taking advantage of the connector between ADAMS and ANSYS software,Which draws a conclusion that stress concentration place is located in the connection between the column of ceiling and the frame,at the same time,illustrating that reinforcing rib located in this place is necessary.Frame fatigue life analysis has been done by FE-SAFE software through importing the load spectrum,which comes to a conclusion that fatigue damage most easily happens in the connection between the column of ceiling and the frame,and the result of frame fatigue life analysis certifies reinforcing rib in that place is reasonable.为了更精确分析观光车车架的动态受力,用UG建立车架的三维模型,导入HYPERMESH抽取中面并生成车架的有限元模型。用ANSYS对车架进行了模态分析并导出柔性体中性文件（MNF文件）。考虑到路面、轮胎和悬架对车架受力的影响,在ADAMS中建立观光车整车的刚柔耦合模型,在D级路面上对整车进行运动学仿真,确定车架柔性体受力最大的一些热点,并导出车架与悬架连接处各点的载荷谱。利用ADAMS与ANSYS的接口把载荷谱导入ANSYS对车架进行瞬态响应分析,得出顶棚后支柱与车架连接处为应力集中处,说明此处设置加强筋是必要的。用FE-SAFE软件导入载荷谱对车架进行疲劳寿命分析,得出车架顶棚后支柱与车架连接处最易发生疲劳损伤,再次证明此处设置加强筋是合理的。