The reentry vehicle is in an unconstrained free-flight state during the reentry process. The pressure of air fluctuations acts on the external surface of the vehicle and induces a random vibration environment with a wide-frequency range, which makes great influences on the structural dynamic properties of vehicles. This paper aims at the parallel calculation of the wide-frequency random vibration problems for the free body under multipoint fluctuating pressure loads. The calculation method is based on the self-developed JAUMIN framework and PANDA platform. The novel algorithm based on the modal superposition method reduces the computational complexity, realizes the parallel calculation, and achieves the maximum numerical simulation calculation capacity of 1.045 billion degrees of freedom (DOFs) while improving the calculation efficiency and the accuracy of the results. Finally, this article also uses typical examples to verify the correctness and parallel scalability of algorithms and programs.

中文翻译：

---

变压环境下再入飞行器随机振动的并行计算

再入飞行器在再入过程中处于不受约束的自由飞行状态。空气波动的压力作用于车辆的外表面，诱发宽频率范围的随机振动环境，对车辆的结构动力学性能产生很大影响。本文针对多点脉动压力载荷下自由体宽频随机振动问题的并行计算。计算方法基于自主研发的JAUMIN框架和PANDA平台。基于模态叠加法的新算法降低了计算复杂度，实现了并行计算，达到了最大数值模拟计算能力1。0450亿自由度（DOFs），同时提高计算效率和结果的准确性。最后，本文还通过典型实例来验证算法和程序的正确性和并行可扩展性。