强脉动压力下飞行器随机振动分析算法与并行实现

doi:10.19596/j.cnki.1001-246x.8208

计算物理 ›› 2021, Vol. 38 ›› Issue (2): 192-198.DOI: 10.19596/j.cnki.1001-246x.8208

强脉动压力下飞行器随机振动分析算法与并行实现

范宣华¹, 王柯颖¹, 肖世富¹, 陈璞²

1. 中国工程物理研究院总体工程研究所, 四川绵阳 621999;
2. 北京大学力学与工程科学系, 北京 100871

收稿日期:2020-03-02 修回日期:2020-05-16 发布日期:2021-09-29
作者简介:范宣华(1981-),男,博士,研究员,博士生导师,E-mail:fanxh@caep.cn
基金资助:
国家自然科学基金（11872059）、核科学挑战专题（TZ2018002）和国防基础科研计划（C1520110002）资助项目

Algorithm for Multi-point Random Vibration Analysis of a Flight Device Under Strong Fluctuating Pressures and Parallel Implementation

FAN Xuanhua¹, WANG Keying¹, XIAO Shifu¹, CHEN Pu²

1. Institute of Systems Engineering, CAEP, Mianyang, Sichuan 621999, China;
2. Department of Mechanics and Engineering Science, Peking University, Beijing 100871, China

Received:2020-03-02 Revised:2020-05-16 Published:2021-09-29

摘要/Abstract

摘要： 以飞行器再入大气层过程中承受多点强相关脉动压力下的随机振动分析为研究背景，从自由体模态分析入手，考虑脉动压力之间的强相关性，建立自由体动力学方程并推导刚-弹模态耦合作用下的随机振动理论，完成算法设计并在自主并行软件平台PANDA中进行代码实现，通过典型飞行器算例开展正确性验证和应用研究。研究表明：飞行器再入过程的刚体运动对结构在低频段的响应影响显著，甚至起到主导作用，越靠近零频附近，这种影响越大；在中高频段，弹性响应逐渐占据主导地位。基于自主研发形成的随机振动分析模块可以较好地模拟飞行器再入过程脉动压力诱导的随机振动响应，具备超大规模并行计算能力。

关键词: 随机振动, 飞行器, 并行计算, 脉动压力, PANDA平台

Abstract: Random vibration analysis for a flight device under multi-point strong correlated fluctuating pressures in the process of reentry into the atmosphere is studied. Starting from a free body modal analysis and considering strong correlation properties among fluctuating pressures, free body dynamic equations were established and random vibration theory under rigid-elastic modal coupling was deduced. The algorithm design is completed and the code is implemented in a self-developed parallel software platform PANDA. Correctness verification and application research were carried out with a typical numerical example. It shows that rigid body motion of the flight device has a significant impact on the response of structure in low frequency band, and it even plays a leading role. The closer to zero frequency, the greater the impact. In middle and high frequency bands, elastic response gradually takes dominant positions. A self-developed random vibration analysis module simulates well the dynamic response induced by fluctuating pressures in the flight device reentry process. It has a super large-scale parallel computing ability.

Key words: random vibration, flight device, parallel computation, fluctuating pressure, PANDA platform

中图分类号:

TB132

范宣华, 王柯颖, 肖世富, 陈璞. 强脉动压力下飞行器随机振动分析算法与并行实现[J]. 计算物理, 2021, 38(2): 192-198.

FAN Xuanhua, WANG Keying, XIAO Shifu, CHEN Pu. Algorithm for Multi-point Random Vibration Analysis of a Flight Device Under Strong Fluctuating Pressures and Parallel Implementation[J]. Chinese Journal of Computational Physics, 2021, 38(2): 192-198.

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强脉动压力下飞行器随机振动分析算法与并行实现

Algorithm for Multi-point Random Vibration Analysis of a Flight Device Under Strong Fluctuating Pressures and Parallel Implementation

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