本文以大型浅拉延冲压件为对象，提出了一种混合网格分析方法，本方法用有限元定义应变，以变形流动度张量为基础，由单元边长求解其内部主应变，计算被测量部件的表面应变、应力分布情况。作为使用范例，本文选择了ＣＡ１４１汽车发动机罩，并根据其应变、应力分布区域特征澄清了发动机罩产生鼓动的机理，为该缺陷的消除或抑制提供了基本依据。 In this paper, we propose a hybrid mesh analysis method for large-scale shallow-drawing stampings. The method uses the finite element method to define the strain. Based on the deformation fluidity tensor, the internal principal strain is solved by the unit length. Surface strain measurement of components, stress distribution. As an example of use, CA141 automobile hood was chosen. According to the characteristics of its strain and stress distribution, the mechanism of engine hood was clarified, which provided a basic basis for the elimination or suppression of this defect.