本发明公开了一种纯电动车乘员舱结构和底盘车架结构之间的性能指标分解方法,步骤一、确定实际乘员舱尺寸、底盘车架尺寸和电池仓尺寸；将乘员舱简化为乘员舱框架结构,将底盘车架和电池仓的组合结构简化为底盘车架框架结构；以及将所述车乘员舱框架结构和所述底盘车架框架结构组合形成耦合系统；所述车乘员框架结构和所述底盘车架框架结构均由矩形钢管构成；步骤二、以初始尺寸为基础,分别改变所述乘员舱框架结构的矩形钢管的截面尺寸和所述底盘车架框架结构的矩形钢管的截面尺寸,得到不同规格的乘员舱框架结构和底盘车架框架结构；获取乘员舱结构、底盘车架模块和耦合系统之间的弯曲刚度、扭转刚度关系,以及一阶弯曲、一阶扭转模态频率关系。

The invention discloses a method for decomposing performance indicators between a passenger cabin structure and a chassis frame structure of a pure electric vehicle. Step one is to determine the actual passenger cabin size, the chassis frame size and the battery cabin size; the passenger cabin is simplified into the passenger cabin Frame structure, simplifying the combined structure of the chassis frame and the battery compartment into a chassis frame frame structure; and combining the vehicle occupant compartment frame structure and the chassis frame frame structure to form a coupling system; the vehicle occupant frame structure and The chassis frame frame structure is composed of rectangular steel pipes; step two, based on the initial size, respectively change the cross-sectional size of the rectangular steel pipe of the passenger compartment frame structure and the cross-sectional size of the rectangular steel pipe of the chassis frame frame structure , Obtain the passenger compartment frame structure and chassis frame frame structure of different specifications; Obtain the bending stiffness and torsional stiffness relationship between the passenger compartment structure, the chassis frame module and the coupling system, as well as the first-order bending and first-order torsion mode frequency relationship