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使用基于动态显式算法的商业软件LS-DYNA建立了某汽车发动机隔热罩拉延成形的有限元模型.通过所建立的有限元模型分析了压边力对拉延成形的影响.有限元分析结果表明,没有合适的能同时有效抑制板料皱折和破裂的压边力.因此,文中采用拉延筋和压边力来共同控制拉延成形,并通过有限元分析比较了几种典型的拉延筋布置方案,选择其中最有效的一种进行试冲试验.结果表明,有限元分析结果和试验结果吻合较好,该拉延筋的布置能消除工件的皱折,同时避免过度变薄.有限元分析有助于工程师在设计初期制定正确的设计方案,使该产品的开发周期从过去的12周缩短为4周.
The finite element model of automobile engine heat shield was established by LS-DYNA, a commercial software based on dynamic explicit algorithm. The influence of blank holder force on drawing was analyzed by finite element model. Finite element analysis The results show that there is no suitable blank holder force that can effectively suppress the wrinkling and rupture of the sheet.Accordingly, drawbead and blank holder force are used to control drawing forming together, and several typical Drawstring layout program, select one of the most effective test run test results show that the results of finite element analysis and test results agree well, the drawbead arrangement can eliminate the workpiece wrinkles, while avoiding excessive thinning Finite element analysis helps engineers design the right design early in the design cycle, reducing the product development cycle from 12 weeks to 4 weeks.