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Numerically simulating structural behaviors of a product using explicit finite element analysis with a combined technique of mass scaling and subcycling
Numerically simulating structural behaviors of a product using explicit finite element analysis with a combined technique of mass scaling and subcycling
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机译:使用显式有限元分析并结合质量缩放和子循环技术,对产品的结构行为进行数值模拟
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摘要
Methods and systems for numerically simulating structural behaviors of a product using explicit FEA with a combined technique of subcycling and mass scaling are disclosed. A FEA model representing a product and a minimum time step size (Δtmin) for a time-marching simulation of the product are specified. N element groups is established with the first element group associated with Δtmin as required minimum time step size, while other element groups with integer multiples of Δtmin according to formula Δti=2i-1Δtmin, n=1, 2, . . . , N. Finite elements are periodically resorted into N element groups based on their new respective Δtcr. To ensure all finite elements in the FEA model are processed at the user specified minimum time step size, proper amount of mass scaling is applied to those finite elements that are or have become too small to maintain a stable solution in the first element group.
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机译:公开了使用显式FEA以及子循环和质量缩放的组合技术对产品的结构行为进行数值模拟的方法和系统。指定了表示产品的FEA模型和产品的时间行进模拟的最小时间步长(Δt min Sub>)。根据所需的最小时间步长,与第一个与Δt min Sub>关联的元素组建立了N个元素组,而其他元素组则根据公式Δt<具有Δt min Sub>的整数倍。 Sub> i Sub> = 2 i-1 Sup>Δt min Sub>,n = 1、2,...。 。 。有限元素基于它们各自的新Δt cr Sub>周期性地归为N个元素组。为了确保FEA模型中的所有有限元都以用户指定的最小时间步长进行处理,将适当数量的质量缩放比例应用于那些太小或太小而无法在第一元素组中保持稳定解的有限元。
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