Based On The Virtual Prototype Car Disc Brake Squeal Of The Research

In the 21st century, cars have become an indispensable means of transport of people's lives, one of the popular vehicles to people's quality of life has been further improved, but with the popularity of the car, also comes with convenient life a series of issues, including environmental noise pollution is a major issue to be addressed letter.Based on a physical prototype car disc brake, the vibration theory, three-dimensional design software, CATIA V5 R17, fast automatic exchange of data-specific software CADFIX 7.1 and the finite element analysis software ANSYS9.0 as a tool for the brake in some work situation when the problem is easy to produce brake squeal, the brake to optimize the structure parameters.Firstly, the use of 3D design software for CATIA V5 R17 Design of mechanical parts (PDG:Part Design), and assembly design (ASD:Assembly Design) modules, combined with bottom-up (BOTTUM-UP) and top-down (TOP-DOWN) two modeling methods to model disc brake, and then use movement mechanism simulation (KIN:DMU Kinematics) module of the model simulation, various components in determining the model structure of reasonable size, well after the assembly of each simulation exercise components can be simplified to remove the finite element analysis of accuracy of calculation is small but great influence on the chamfer, holes and other structural elements, the finite element analysis for the next step to prepare, and then fast automatic exchange of private data CADFIX 7.1 software will be built in CATIA V5 R17 in the order* modle format of the disc brake model into various parts Prosolid 14.0 format, so that the three-dimensional model built into the file format can be imported ANSYS9.0. After the model into ANSYS9.0, find the disc brake according to the various parts of the material properties and historical test data, finite element modeling of disc brakes, the completion of unit selection, meshing, boundary conditions and calculation of binding frequency range of settings, using Block Lanczos (block) method of the model modal analysis to determine the structure of the natural frequencies and mode shapes, from the structural parameters to identify the parts easy to produce brake squeal, and then CATIA V5 R17 irrational parts of the structural design of the structure is optimized, and then parts of the optimum design of modal analysis again, this cycle of work, until you determine the mode to improve. This study shows that by improving the structure of the method can effectively improve the disc brake structure of the amplitude of velocity to suppress the occurrence of brake squeal.