Dynamic simulations of cylinder head were researched. Boundary restrictions and loading conditions that simulated the actual ones were exerted on the finite element model of the cylinder head and its dynamic responses were calculated with the superposition method of vibration mode. Dynamic modifying of some structure parameters was calculated to fulfill the design requirements. The to-be-amended parameters were selected from all the parameters according to the so called sensitivity analysis method

that was to select the parameters which vary the dynamic properties greatly

based on the calculations of the variation of the dynamic properties with each parameter. With this method

the dynamic properties of the amended cylinder head could satisfy the design requirements. The above optimization of cylinder head lays a solid foundation of the dynamic simulations of complete engine.