【摘要】 以某类气门弹簧为研究对象,分别建立了其三维几何模型和有限元模型。依据某型四缸汽车发动机配气机构数模,利用AVL EXCITE TIMING DRIVE建立其单阀系配气机构的动力学模型,对该模型进行仿真分析,检验了气门弹簧设计的合理性。基于动力学模型仿真结果,对气门弹簧有限元模型进行动态应力仿真分析,检验建立的动力学模型的准确性。并通过动态应变试验分析,用试验测得的应力值对动态仿真模型进行了验证。结果表明:该气门弹簧符合设计要求,仿真和试验所得的应力曲线基本吻合,所建立仿真模型具有一定的可行性。更多还原

【Abstract】 Taking a certain type of valve spring as the research object, three-dimensional geometric model and finite element model are established respectively. According to the numerical model of valve train of a four-cylinder automobile engine, the dynamic model of single valve train valve train is established by AVL EXCITE TIMING DRIVE. The simulation analysis of the model verifies the rationality of valve spring design. Based on the simulation results of dynamic model, the finite element model of valve spring is simulated and analyzed to verify the accuracy of the established dynamic model. Through the analysis of dynamic strain test, the dynamic simulation model is validated by the measured stress value. The results show that the valve spring meets the design requirements, and the stress curves obtained by simulation and experiment basically coincide, and the simulation model is feasible.更多还原