某型号的柴油发动机配套轮式装载机使用后,常出现排气尾管在根部处开裂。深入分析排气尾管的结构载荷与温度载荷的特点,判断出开裂的主要原因。同时,基于ANSYS软件分析平台,对排气尾管进行热与结构的有限元耦合分析,从理论计算上验证了开裂分析的正确性。根据开裂原因,对排气尾管进行设计改进。并利用有限元计算模型,对比排气尾管改进前后的性能,证明设计改进有效。 After the use of a diesel engine with a wheel loader, the tail pipe often cracks at the root. In-depth analysis of the structural characteristics of exhaust tail pipe load and temperature, to determine the main reason for cracking. At the same time, based on the ANSYS software analysis platform, coupled with finite element analysis of exhaust tailpipe, the correctness of crack analysis is verified by theoretical calculation. According to the reason of cracking, the exhaust tail pipe is designed and improved. The finite element model is used to compare the performance before and after the exhaust tail pipe is improved, which proves that the design is improved and effective.