多体ダイナミクスの並列コンピュータ・シミュレーション

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  • Multi-body Dynamics Simulation by Parallel Computers.
  • タタイ ダイナミクス ノ ヘイレツ コンピュータ シミュレーション

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The purpose of this study is to establish a technique of solving large scale problems associated with multi-body dynamics simulations and to break through the limitations imposed by traditional methods. It is necessary to compute on a computer, which is fast and has larger memory, for multibody analysis of LSS (Large Space Structure). The sequential algorithms of numerical computation on traditional computers such as PC, EWS, and vector supercomputer have computational limitations. We have developed a multi-body dynamics simulation code which is called CNBODY (Constrained N BODY), and upgrad for MPP (massively parallel multi-processor) computer and parallel computer cluster implementation. The algorithm of CNBODY has been established based on an unified matrix method which is called the extended inertia matrix. it is very important to solve the linear system with efficiency for the large scale problem. On distributed parallel machine, the large size extended inertia matrix is divided some regions and set on each node (processor) by appropriate manner. The new CNBODY has several data distribution method, and solves the linear system by direct method. The distributed parallel CNBODY made sure the effciency for the large scale problem.

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