中文摘要：

采用模板的方法构建了参数化的白车身概念设计线框模型，基于梁单元建立了柔性的车身结构有限元分析模型；建立了基于真实截面形状的参数化车身梁截面库，可直接计算截面的特性参数；实现了单元接头实现了对接头参数化精细模拟，提高了车身结构有限元模型的仿真分析精度；最后以实例的形式给出了该模型和详细车身结构模型的结构仿真分析的结果对比，结果表明采用梁单元模型构建车身结构符合车身设计初期的精度要求，并具有结构简单、计算速度快、易实现参数化等优点，适合在车身设计概念阶段快速评估车身的结构性能。

英文摘要：

The parametric frame model of car body in white was built by the method of template. The beam element was adopted to constitute a Jlexible FEM analysis model. The database of parametric section of body was built to store sections with real shape and joint element was used to simulate the joint in the body which would improve the precision of model of body. An analysis example which was contrast between simple model with beam mesh in advance design and detail model in detail design was given finally. The result shown the precision of the model with beam element is fit to the requirement of advance design of car body. Moreover,the car body model has some advantages which are simple structure,rapid calculating and easy to parameterize. Therefore,it is feasible to evaluate the structural property of car body in advance design using beam element model.