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论述汽车覆盖件成形数值模拟涉及的关键技术，包括退化四节点壳单元应用、有限元计算模型建立、接触摩擦分析及显式时间积分方法等，给出了两个模拟实例。
The key technologies involved in the numerical simulation of automobile panel forming are discussed, including the application of degenerated four-node shell element, the establishment of finite element model, the contact friction analysis and explicit time integration method. Two simulation examples are given.