UG Based Research And Application Of The Inertia Moment Distribution Of The Car B Pillars

In recent years,as the oil crisis and environment pollution problem is increasingly serious,lightweight become a hot research topic in the automotive industry.Automotive lightweighting design cannot ignore the safety performance of cars,therefore on the basis of guarantee safety research auto lightweight design become a mainstream trend of body design at present.B pillar as the main vehicle side impact energy absorption.The rationality of the design of the directly about the car side impact performance,has become a key point in the research of the car at home and abroad.Due to the importance of B pillar.Its material is often choose relatively expensive cost of continuous variable cross-section(TRB) plate.By adjusting the thickness of the sheet continuous variable cross-section changes to reduce the quality of the body,Complete auto lightweight design.Because of the complexity of the B pillar design,in order to reduce the quality of the B pillar,often does not guarantee the safety performance of B pillar.In this paper, a model to body B pillar as the research object,according to the C-NCAP side impact performance regulations,combining with the basic theory of classical mechanics,reverse inertia moment distribution algorithm is deduced from a set of B pillar.And in the UG B pillar inertia moment distribution model is established,application of advanced simulation module of UG validation B pillar inertia algorithm optimization results of side impact performance;Then set up B column model in UG,by adjusting the B pillar in continuous variable cross-section board thickness to adjust the distribution of moment of inertia of B pillar.Application of finite element analysis software ANSYS,to optimize before and after the optimization of B pillar for simulation analysis,to verify the feasibility of the project B pillar moment of inertia on the algorithm;Finally using UG and ANSYS secondary development function,design B pillar plate in continuous variable cross-section modeling and analysis module.Through the study of this article for the automotive lightweight design in column B to provide certain reference value.