车身设计, 减基法, 自适应技术, 混合算法

A hierarchical adaptive technique was suggested to rapidly evaluate the structural behaviors of a multi-parameterized large-scale problem in vehicle body design.It is found that the method is computational stability with a higher accuracy.The stiffness matrix of finite element shell formulation is first decomposed and reformed to achieve a parametrized formulation.The reduced system is obtained by projecting the original system onto a predefined approximate subspace.In order to improve the computational performance in constructing the subspace,the greedy adaptive method and the directly orthogonal method were analyzed and a hierarchical adaptive technique was suggested. It is realized that proposed technique is efficient in structural engineering such as vehicle body design and is applicable to many other structural design contexts.