The Development Of The Drop Hammer Test Machine And Collision Analysis Of Automotive Components

Vehicle safety is one of the three major themes in the development of the automobile industry, and with the increase of speed and the increase in the number of cars.More and more people pay attention to the safety of the car. The security of all countries and regions on the automotive requirements more stringent.Therefore,the major enterprises and research institutes are committed to improve the safety performance of the car, and try to reduce the cost of inputs. Test methods and apparatus for efficient, simple and accurate is the key to the safety of the vehicle and parts detection. Therefore, this paper designs the Impact testing machine and analyzes vehicle collision.In this paper, first of all, we first study the domestic and foreign related research background; a comparison is made with the current commonly used impact test methods. And on this basis, design a new drop hammer impact test machine, drawn 3D model in CATIA; describe the working principle and key components in detail.Then the finite element model of a certain type of vehicle is established, in order to improve the working efficiency, the finite element is simplified. Simulation analysis is carried out in the LS DYNA, evaluated the safety of the body in the crash acceleration, impact force,displacement of firewall, finally found displacement of firewall is too large and need to further optimization. Front rail is the main energy absorbing components in the frontal crash. In this paper, comparing the collision data of the front rail in different cross-section shape, guide cell, thickness, materials and so on several aspects and studying the effect of various factors on the front side rail resistance, to lay the foundation for the next optimization.This paper selects the car front energy absorbing components as the research object, the thickness of the bumper beam, energy absorbing box and the front rail beam as the design variables, energy absorption and acceleration, collision force as a target, and use the to optimize the problem in the integrated optimization platform of Isight and LS-DYNA. And compared the results before and after optimization, in the premise of not increasing the quality of the car, the performance of the crash was improved, and the safety performance was improved, which laid the foundation for the follow-up fine body research.