悬置支架对飞轮壳可靠性的影响

李超^1，2，王景新^1，2，张晓辉^1，2，赵雪飞^1，2，苏艳^1，2

1.内燃机可靠性国家重点实验室，山东 潍坊  261061；

2.潍柴动力股份有限公司应用工程中心，山东 潍坊  261061

摘要：针对某商用车出现的飞轮壳破损故障，采用Hypermesh建立动力总成模型，结合ABAQUS软件仿真计算飞轮壳静强度应力分布、高周疲劳分布、飞轮壳与悬置支架接触面滑移。结果表明：飞轮壳与悬置支架接触面右上角螺栓滑移超标，是造成飞轮壳破损的主要原因。将悬置支架上部十字筋改为斜筋，支架下部增加斜向筋，进行仿真和市场验证。仿真结果表明：优化前、后静强度应力及高周疲劳强度大致相同，飞轮壳与悬置支架接触面最大滑移由0.197 mm减小为0.080 mm，满足使用要求，有效解决飞轮壳破损故障。

关键词：悬置支架；飞轮壳；可靠性；仿真分析

Influence of suspension support on the reliability of flywheel housing

LI Chao^1,2, WANG Jingxin^1,2, ZHANG Xiaohui^1,2, ZHAO Xuefei^1,2, SU Yan^1,2

1. State Key Laboratory of Engine Reliability, Weifang 261061, China;

2. Application Engineering Center,Weichai Power Co., Ltd., Weifang 261061,China

Abstract：In view of the flywheel housing failure of a commercial vehicle, Hypermesh is used to establish a powertrain model, and ABAQUS is used to simulate the static strength stress distribution, high cycle fatigue distribution, and the slippage of the contact surface between the flywheel housing and the mounting bracket. The results indicate that the slip of bolt in the upper right corner of the contact surface between the flywheel housing and the suspension bracket exceeded the standard, which is the main reason for the damage of the flywheel housing. The cross reinforcement on the upper part of the suspension bracket to diagonal reinforcement is changed, and diagonal reinforcement on the lower part of the bracket is added for simulation and market validation. The simulation results show that the static strength stress and high cycle fatigue strength before and after optimization are roughly the same. The maximum slip of the contact surface between the flywheel housing and the suspension bracket is reduced from 0.197 mm to 0.080 mm, meeting the design requirements and effectively solving the flywheel housing damage fault.

Keywords:suspension bracket; flywheel housing; reliability; simulation analysis