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

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

Abstract

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

CLC Number:

TB132

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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