Parallel-in-space-and-time finite-element analysis of electric machines using time step overlapping in a massively parallel computing environment
Parallel-in-space-and-time finite-element analysis of electric machines using time step overlapping in a massively parallel computing environment
复制标题
在大规模并行计算环境中使用时间步重叠对电机进行时空并行有限元分析
DOI：
10.1108/compel-04-2022-0161
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
and Takeshi Takeshi
中科院分区：
文献类型：
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作者：
Yasuhito Takahashi;Koji Fujiwara;and Takeshi Takeshi
目的利用时间步长重叠技术提高时空并行有限元法（PinST）的并行性能。在一个实际的内置式永磁同步电动机（IPMSM）的磁涡流损耗分析中，使用大规模并行计算环境阐明了所开发方法的有效性。设计/方法/途径所开发的PinST FEM是作为空间并行（PinS）方法的区域分解法和并行时间周期显式误差校正（PTP-EEC）方法的组合，这是时间并行（PinT）方法之一。通过在PTP-EEC方法中对不同过程的时间步长进行重叠，进一步提高了PinST有限元法的并行性能。因此，在实际的IPMSM的磁场分析中，使用大规模并行计算环境，其中超过10，000个进程，实现了PinST有限元法的良好并行性能。独创性/价值在这项研究中，PinST有限元法基于时间步长重叠是新开发的，并在大规模并行计算环境中证明了其有效性，其中单独使用PinS或PinT方法不能实现足够的并行性能。这一发现为电磁场计算的并行计算方法指明了一个新的方向。
PurposeThis study aims to enhance the parallel performance of a parallel-in-space-and-time (PinST) finite-element method (FEM) using time step overlapping. The effectiveness of the developed method is clarified in a magnet eddy-current loss analysis of a practical interior permanent magnet synchronous motor (IPMSM) using a massively parallel computing environment.Design/methodology/approachThe developed PinST FEM is a combination of the domain decomposition method as a parallel-in-space (PinS) method and a parallel time-periodic explicit error correction (PTP-EEC) method, which is one of the parallel-in-time (PinT) approaches. The parallel performance of the PinST FEM is further improved by overlapping the time steps with different processes in the PTP-EEC method.FindingsBy applying the overlapping PTP-EEC method, the convergence of the transient solution to its steady state can be accelerated drastically. Consequently, the good parallel performance of the PinST FEM is achieved in magnetic field analyses of the practical IPMSM using a massively parallel computing environment, in which over 10,000 processes are used.Originality/valueIn this study, the PinST FEM based on time step overlapping is newly developed and its effectiveness is demonstrated in a massively parallel computing environment, in which using either the PinS or PinT method alone cannot achieve sufficient parallel performance. This finding implies a new direction of parallel computing approaches for electromagnetic field computation.