The method has three features : 1 ) the dimensions used in commercial cad system are selected to be the design variables of shape optimization . 2 ) a mapping between geometry objects and finite element objects such " as meshes, structure properties is set up to assist in defining finite element models on geometries . 3 ) an automatic mesh generator and a method by which structure properties is assigned from geometry objects to finite element objects automatically are used to update finite element models during the optimization process 通過(guò)將幾何模型的設(shè)計(jì)參數(shù)作為有限元模型的形狀控制參數(shù),實(shí)現(xiàn)了有限元模型的參數(shù)定義;通過(guò)建立幾何模型與有限元網(wǎng)格及模型物理描述之間的關(guān)聯(lián),實(shí)現(xiàn)了基于幾何造型的有限元模型定義;利用基于幾何模型的全自動(dòng)網(wǎng)格生成方法及物理描述分派方法,實(shí)現(xiàn)了有限元模型的自動(dòng)生成及應(yīng)參數(shù)變化的自動(dòng)更新;并以參數(shù)化造型軟件mdt為支撐平臺(tái),開發(fā)了相應(yīng)的參數(shù)化有限元建模程序。