Modal Analysis And Lightweight Design Of Engine Cylinder Head

With the increasing number of people owning automobiles,the problem of resource shortage and environmental pollution has become one of the important issues at present.In this trend,the lightweight design of automobile components has become a hot research issue in the direction of automobiles.As an important part of the automobile,this article mainly explores how to reduce the quality without affecting its current performance.Focus on structural rigidity,NVH,weight reduction effects,etc.,and use topological optimization and size optimization to conduct lightweight research on the cylinder head.The main research content and results are as follows:1.Use HANDY SCAN300 3D scanner to collect data on the cylinder head,and use proe 3D modeling software to process the collected point cloud data,avoiding errors caused by human measurement and improving modeling accuracy2.Apply ANSYS workbench pre-processing software to clean up the cylinder head model.After discussing the mesh convergence,select the best mesh quality to divide and complete the construction of the cylinder head finite element model.The finite element software is used to perform free modal test and static analysis on the cylinder head.3.Introduced the experimental modal analysis process and the precautions of each step,applied OROS test equipment to perform experimental modal analysis on the actual cylinder head,and compared the obtained experimental modal parameters with the theoretical modal parameters obtained in the second step.It is found that the natural frequency error of each order mode is within 5%,and the mode shapes are similar,which verifies the accuracy of the finite element model.4.Topological optimization of the finite element cylinder head.Optimize the cylinder head with the first five orders of the cylinder head and the static deformation as the constraints,and the quality as the design goal.5.Optimize the size of the cylinder head based on the optimization results of the topology optimization.Optimize the cylinder head based on the honeycomb structure model based on the performance of the cylinder head.Discuss the amount of deformation and deformation of the cylinder head based on different materials.On the basis of not affecting the performance of the cylinder head,1.756 kg was reduced,and the lightweight design was completed.