In order for parametric models to have any validity they must be based on or proven using actual project data.
为了参数的模型具备有效性，他们就必须基于或者被证明为是使用精确的项目数据的。
The paper mainly studied the following contents:(1)Researched the basic contents in parametric design on KBE technique: the first, create models of the parts using of the KBE technique;
研究基于知识工程（KBE）技术实现参数化设计的两个基本内容：一、引用知识工程的方法创建模型实例；
Using parametric variational principle and hierarchical method, the generalized constitutive models can be solved.
借助于参变量变分原理和分级方法，具有广义本构关系单元的结构可以得解。
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