摘要
针对某四缸机排气歧管在可靠性试验中出现开裂故障,从铸造缺陷、化学成分、硬度及金相组织等方面进行分析,并提出了改进方案。用ABAQUS软件对原方案及改进方案进行了温度场和热应力计算分析,分析结果表明:排气歧管开裂故障系热应力过大造成。改进方案已得到试验验证。
The exhaust manifold of a 4cylinder engine cracked during reliability test. To deal with this failure, analysis on casting faults, chemical composition, hardness and metallographic structure were car ried out, and improvement program was given. Simulation of exhaust manifold temperature field and ther mo stress using ABAQUS software was carried out. The results showed that the cracking of the exhaust manifold was due to a high level of thermo stress. Through comparing calculation results of several differ ent designs, an optimum design was chosen and later verified by test.
出处
《柴油机》
2013年第2期31-33,48,共4页
Diesel Engine
关键词
柴油机
排气歧管
改进设计
CFD
diesel engine
exhaust manifold
improvement design
Computational Fluid Dynamics （CFD）
