A Parallel Solution Method for Structural Dynamic Response Analysis
Paper in proceedings, 2015

With the continuous improvements of technology in and around multi-core CPU:s and GPU:s there is a strong desire to exploit this technology in its full potential. For structural dynamics problems, the domain decomposition is a very mature technique that is well adapted to parallel computations in multi-core machines as it is almost trivially parallelizable. However, competing alternatives with model reduction without parallel computation has also reached an extremely high level of maturity and are thus highly competitive. In this paper, a domain decomposition method, in a procedure named the split-stitch-spread (S3) procedure, is proposed to do transient analysis of large finite element models in parallel. In the method, the structure splits into model substructures with elastic interfacial substructures coupling them together. Each of them can be sent to different computer cores to do time discretization. The model substructures stitch to each other by using interfacial forces and as a result, the systems’ state sequence will be obtained. The solution can then be spread into the substructures and response quantities can be evaluated in parallel processing. The method is applied to a multi-story building subjected to earthquake loading and the results are compared with mode displacement method as a model reduction method with focus on computational efficiency.

Transient analysis

Parallel substructure

Domain decomposition

Elastic interface

Interfacial coupling

Author

Vahid Yaghoubi Nasrabadi

Dynamics

Majid Khorsand Vakilzadeh

Swedish Wind Power Technology Center (SWPTC)

Thomas Abrahamsson

Dynamics

Dynamics of Coupled Structures Conference Proceedings of the Society for Experimental Mechanics Series

Vol. 4 149-161

Subject Categories

Mechanical Engineering

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Latest update

3/19/2018