Research on parametric design approach of body skeleton of passenger car

This paper deals with advanced parametric design approach which realized in the process of modelling and assembly of body skeleton of passenger cars. A parameterized model for the body skeleton is created through a programming language in terms of the common structural features of passenger cars, which can be automatically regenerated into another desired model as the crucial parameters have been modified. There are some significant distinctions between conventional 3D solid modelling — a concrete graphical editing activity, and parameterized programmed modelling — an abstract algorithm-construction activity. Constrains, limits and relations of the dimensions have been applied to the model so as to make it a digital and intelligent one in which the CAD technology has been exerted sufficiently as well. Some principles of the features and constraints based on parametric design are also presented. The realization of this parameterized model lays a foundation for the sequential processes of FEM analysis, sensitivity analysis, structural optimization and the product information management, and consequently, it will improve efficiency and reliability for the body structural design and will promote serial production of passenger cars.