汽车发动机缸盖与排气歧管装配体的模态分析

The assembly of the automobile engine cylinder head and exhaust manifold of modal analysis

发动机排气系统的密封决定着发动机性能,研究发动机的振动对密封性能的影响。应用ANSYS Workbench软件分析,对汽车发动机缸盖、排气歧管密封垫及排气歧管的装配体进行带有预应力的模态分析,得到该装配体的固有频率,并与发动机对外激振频率进行比较,进而判断两者之间不能发生共振现象。证明该因素不会影响发动机缸盖、密封垫片及排气歧管装配体的密封性能。

The sealing of the engine exhaust system determines the engine performance, and to study the effect of the vibration of the engine on the sealing performance. Application of ANSYS Workbench software on the automobile engine cylinder head, the exhaust manifold gasket and the exhaust manifold assembly with a prestressed modal analysis, get the inherent frequency of the assembly, and comparing with the engine external excitation frequency, and judge between cannot occur resonance phenomenon. Show that the factors will not affect the engine cylinder head, sealing gasket sealing performance and exhaust manifold assembly.