Finite Element Meshing Automation System For Specific Component

As the rapid development of the automobile industry,China's tire production and sales have ranked the first in the world.The tire industry has become an important part of the industrial system.With the development of computer technology,finite analysis method has applied to tire development and manufacturing process.The world's leading tire manufacturers have developed their own product development dedicated finite element analysis system.China's tire companies also have begun to explore in this area.In this process,the importance of the tread pattern is gradually recognized.Because of the complexity of the tire pattern,the operator to establish the pattern and the division of finite element grid need to consume a lot of time,and prone to error.In order to solve this problem,this paper has developed a tire multi-intercepted grid meshing automation system,which completes the modeling and meshing of the tread pattern.This method can reduce the difficulty of operation,save time and improve the efficiency of finite element analysis.This paper summarizes the method of generating finite element mesh,and introduces the existing tire finite element analysis process.Based on the particularity of periodic tire structure,a method of creating finite element model based on node is proposed.Due to the cyclicity of the tire pattern,it is only necessary to create a finite element model of the intercepted tire pattern,and then the model can be used to create a complete pattern pattern by creating another pattern intercept in the circumferential direction by minor or array method.The node is the basic unit of the finite element model.The finite element model can be regarded as a grid of several nodes.The pattern of a single intercept is a part of the entire circumference of the tire.The grid plane perpendicular to the tire centerline can be used to generate another mesh by rotating at an angle.If you strictly control the distance of different grid faces,you can use geometric information provided by tire two-dimensional structure to create a tire finite element model of the grid node,and then create a finite element model.The program of generating nodes is compiled by MATLAB programming technique.The auxiliary grid lines are constructed on the basis of the two-dimensional structure of the tires.Using this information,the two-dimensional coordinates of the nodes are created by the program,and the geometric relations of the nodes are used to convert two-dimensional coordinates to three-dimensional coordinates..A different creation pattern is provided for the acquisition of nodes on different grid lines and is numbered according to the geometric information of the nodes.Using the distance relationship of different nodes on the same grid line,the nodes of the groove part are extracted and identified as special nodes.Based on HyperMesh's secondary development technology,TcL language is used to write the auxiliary module of the model.The module can obtain the node coordinates in batches,view the node creation situation and integrate some commonly used functions into the Utility panel.A program for generating an INP file based on node information is compiled with MATLAB.In the INP file,the trench portion of the mesh cell is removed according to the number of special nodes in the cell.Importing INP files into HyperMesh can generate a finite element model of a single intercept of tires,and then uses HyperMesh's rotate module to generate a complete tread pattern.The tire model generated by the above method is introduced into ABAQUS,and its finite element simulation analysis is carried out under static load condition.Under different static loads,the amount of tread and the load of the tire is roughly linear.The effectiveness of the modeling automation system is proved by this simulation structure.