汽车散热器散热管漏水故障分析

摘要

针对某型散热器散热管漏水故障,利用有限元分析方法对散热器的动态应力进行了理论分析.利用CATIA建立散热器三维模型,在HyperMesh中建立散热器有限元模型,用模态试验对有限元模型的正确性进行验证,用RADIOSS求解散热器散热管的动态响应.研究表明,理论计算的散热器散热管所受最大应力的位置与故障散热器的实际漏水点相吻合,故障散热器散热管漏水是散热器在使用过程中因振动产生的应力疲劳裂纹所致.通过对散热器原有结构的改进,使散热器散热管的最大应力下降了42％,提高了散热器的使用寿命.%In view of the leakage failure of a heat sink cooling pipe,a finite element analysis method is used to analyze the dynamic stress of the radiator.Using CATIA to establish three-dimensional model of the radiator,the heat sink finite element model is built in HyperMesh,and the correctness of the finite element model is verified by modal test,and the dynamic response of RADIOSS is used to solve the model.The research shows that the position of the maximum stress in the heat sink cooling pipe is in accord with the actual leakage point of the fault radiator,and the failure of the radiator cooling pipe is due to the stress caused by the vibration of the heat sink.Through the improvement of the original structure of the radiator,the maximum stress of the radiator cooling tube is decreased by 42％,and the service life of the radiator is improved.