Abstract: With the implementation of new regulation(GB14167—2013), the requirement of seat belt anchorage experiment is difficult to satisfy, meanwhile, the increase of the weight is usually inevitable.In order to pass the new regulation, aims to improve the accuracy of the simulation to guide the optimization design.The influences of modeling method of retractor as well as the integration type and distribution of the element on the simulation accuracy have been studied, a more reliable simulation model for the strength of the x-commercial vehicle seat belt anchorage is set up, modeling of seat belt anchorage strength.Through the optimizing of elements type and distribution in the traditional model, the simulation accuracy has been improved significantly with consideration to the efficiency of calculation.Finally, the structure optimization of the weak parts has been carried out to meet the requirements of national regulation, the simulation results are in good agreement with the experiment.

Key words: belt anchorage, retractor, elements type, simulation accuracy