黑龙江科学
黑龍江科學
흑룡강과학
HEILONGJIANG SCIENCE
2015年
16期
10-11,25
,共3页
排气歧管%有限元%流固耦合%开裂
排氣歧管%有限元%流固耦閤%開裂
배기기관%유한원%류고우합%개렬
Exhaust manifold%Finite element%Fluid solid coupling%Cracking
研究某柴油机排气歧管在可靠性实验中出现开裂故障,通过建立排气歧管内流场CFD模型和管壁有限元模型进行流固耦合分析。结果表明:由于排气歧管的内部对流换热和管壁内部导热的作用,排气歧管管壁存在较大的温度,并受到边界约束产生集中应力导致歧管的开裂。通过仿真获得排气歧管发生等效塑性应变,并通过M-C公式可分析排气歧管的疲劳寿命。
研究某柴油機排氣歧管在可靠性實驗中齣現開裂故障,通過建立排氣歧管內流場CFD模型和管壁有限元模型進行流固耦閤分析。結果錶明:由于排氣歧管的內部對流換熱和管壁內部導熱的作用,排氣歧管管壁存在較大的溫度,併受到邊界約束產生集中應力導緻歧管的開裂。通過倣真穫得排氣歧管髮生等效塑性應變,併通過M-C公式可分析排氣歧管的疲勞壽命。
연구모시유궤배기기관재가고성실험중출현개렬고장,통과건립배기기관내류장CFD모형화관벽유한원모형진행류고우합분석。결과표명:유우배기기관적내부대류환열화관벽내부도열적작용,배기기관관벽존재교대적온도,병수도변계약속산생집중응력도치기관적개렬。통과방진획득배기기관발생등효소성응변,병통과M-C공식가분석배기기관적피로수명。
The cracking failure of the exhaust manifold of a diesel engine was studied. The CFD model and the finite element model of the tube wall were analyzed by establishing the model of the flow field in the exhaust manifold. The results show that the temperature of the exhaust manifold is due to the internal heat conduction of the exhaust manifold, and the wall of the exhaust manifold has a large temperature, which is caused by the boundary constraints. The equivalent plastic strain of the exhaust manifold is obtained by simulation, and the fatigue life of the exhaust manifold can be analyzed by M-C formula.