摘要
提出一种自动快速计算方法实现壳结构设计中多参数大规模问题的快速计算。该方法将参数域离散技术、显式参数化有限元技术和子空间构造技术通过自动快速计算流程联系起来,提高了快速计算方法的可操作性,改变了常规快速计算方法的流程。同时,通过误差控制实现对子空间的实时更新,在提高快速计算方法的精度的同时减少计算成本。该方法在车身结构设计过程的结果表明,自动算法具有更高的精度和更少的计算时间。该方法可以应用于多参数大规模结构设计过程以及有实时计算要求的场合。
An automatic and rapid computational method was suggested to predict the structural behavior of multi-parameterized and large-scale problems in structural design.Some isolate techniques,such as parameter domain discretization,explicit parametrized finite element method and subspace construction method,were connected by the automatic computational procedure to improve the feasibility of the method.The procedure of general rapid computational method was changed.Furthermore,the subspace constructed in the procedure was real-time updated according to the computational error.Meanwhile,the accuracy of the automatic computational method was improved and the cost of constructing the subspace is reduced.The method was applied to the stiffness evaluation of a vehicle body.It is found that the subspace derived from the automatic method is of higher accuracy with less computational efforts.The method is applicable to the multi-parameterized large-scale structural design and real-time design contexts.
出处
《计算力学学报》
EI
CAS
CSCD
北大核心
2011年第3期332-337,共6页
Chinese Journal of Computational Mechanics
基金
国家杰出青年基金(10725208)
湖南大学汽车车身先进设计制造国家重点实验室自主课题(61075003)资助项目
关键词
减基法
混合数值方法
子空间
壳结构
车身设计
reduced-basis method
hybrid numerical method
subspace
shell structure
vehicle body design
