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大型复杂装备的可靠性设计要求对结构动力学大规模精细数值模拟提出了新的挑战。本文基于PANDA自主并行计算平台,采用模态叠加法对多点基础激励作用下的谐响应分析开展了算法设计和并行实现研究,构建了相应的并行求解模块。结合商业有限元软件对研发模块的正确性进行了验证;将该模块应用于某光机装置,实现了其11.88亿自由度超大规模的高效并行求解。研究结果表明,研发的多点基础激励谐响应分析模块可用于复杂装备的高效精细数值模拟,具备强大的并行计算能力,最大可扩展CPU核数可达数千个,远超现有通用商业有限元软件。
The reliability design requirements of large and complex equipment pose new challenges to large-scale numerical simulation of structural dynamics. Based on the PANDA autonomous parallel computing platform, the modal superposition method is used to study the algorithm design and parallel implementation of harmonic response analysis under multi-point basic excitation, and the corresponding parallel solution module is constructed. The correctness of the R & D module was verified with the commercial finite element software. The module was applied to an optical device and achieved an ultra-large-scale and highly efficient parallel solution of 1.188 billion degrees of freedom. The results show that the developed multi-point based excitation harmonic response analysis module can be used to efficiently and numerically simulate complex equipment with powerful parallel computing capability. The maximum number of scalable CPU cores can reach thousands, which is far beyond the current general commercial limit Yuan software.