Efficient explicit finite element analysis of a product with a time step size control scheme
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United States of America Patent
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app pub date -
Oct 27, 2015
filing date -
Oct 27, 2015
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Abstract
FEA model contains first and second layers of nodes to form a group of node-pairs, each containing one node in the first layer and a corresponding node in the second layer. Nodes in each node-pair are located in a substantially closer distance comparing with distances to other nodes. Candidate finite elements for controlling time-step size are identified. Each candidate finite element is defined by one or more node-pairs. At each solution cycle of a time-marching simulation, nodal forces of the FEA model including candidate finite elements are obtained. A scaled dimension is calculated by multiplying the smallest dimension with a speed-up scale factor. A critical dimension for controlling the next solution cycle's time-step size is then determined. A fraction of the corresponding nodal forces to be redistributed for maintaining a stable solution are calculated and redistributed according to a formula based nodal masses and speed-up scale factor.
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