COMPUTATIONAL DEVELOPMENTS VIA MODEL ORDER REDUCTION FOR THERMAL-STRUCTURAL DYNAMIC PROBLEMS WITH MULTIPLE SUBDOMAINS

摘要：

　　A robust proper orthogonal decomposition technique is applied to develop reduced-order models (ROMs) for time-dependent thermal stress problems that are arbitrarily discretized with multiple sub-domains.This approach enables large computational savings for model problems with either/both transient thermal and dynamic structural effects by reducing the degrees of freedom with minimal losses to accuracy.The method of snapshots is used to construct a reduced-order basis from a short training simulation of the full-order model (FOM) which selectively preserves only the relevant physical characteristics of the solution.A numerical example in thermally-induced vibrations with multiple domains via the finite element method illustrates the robustness and utility of the proposed methodology.

关键词： thermally-induced vibrations subdomain differential algebraic equation reduced-order modeling

作者: D.Maxam R.Deokar K.K.Tamma

作者单位: Department of Mechanical Engineering, University of Minnesota-Twin Cities,111 Church St.SE, Minneapolis, MN 55455, United States of America

会议类型: 国际会议

会议名称: 12th International Congress onThermal Stresses (第十二届国际热应力大会)

会议地点: 杭州

会议语种:英文

页码: 143-146

在线出版日期: 2019-06-01（万方平台首次上网日期，不代表论文的发表时间）