System Strength Analysis Of Vehicle Seatbelt Anchorage

In recent years, the car generally become the public means of transportation, people’s demand is increasing. However, with the growth of car sales, car accidents and the number of casualties in the accident also grow. Therefore, the security performance of the car is an important index for people to buy cars. In the structure of the vehicle, car seat belt is one of the main components of the human body contact, the protection for the human body, in order to avoid the crew casualties, it is necessary to improve the strength of the belt performance.First of all, this paper introduces the strength of the seat belt anchorage’s development and research direction, established the finite element simulation model, and simplified the parts of non-critical, using Hypermesh software to grid the finite element model. Through the contrast analysis of explicit and implicit algorithm on the calculation of the advantages and disadvantages, as the seat belt anchorage strength simulation is a quasi-static process, chose the explicit finite element method to analysis a car seat belt simulation model. With car B pillar belt node displacement of the installation points to measure the accuracy of the model. Respectively with different loading function and loading time simulation, find the reasonable loading time and loading function, to keep the simulation results’ accuracy and stability. Then, respectively use the HL unit, the BWC unit, the BT unit, complete integral unit to test seat belt tensile simulation analysis. By comparing the key parts of the node displacement, choose the more appropriate complete integral unit as the simulation analysis of unit format.When the conditions are determined, proceed seatbelt anchorage strength analysis of the simulation. According to the regulations of the national standards, use Ls-Dyna solver for solving, analyzing safety anchorage and its installation location of material strain, found the material failure parts. Put forward in the area of material failure to add local reinforcement scheme, failure parts to improve the strength of materials, proven by simulation analysis, to determine the scheme is feasible. In this paper, the research process can give the rest of the quasi static, nonlinear finite element simulation some reference.