Dynamics modeling and simulating of the underwater launch system under the impact load

IF 4.6 2区工程技术 Q1 ENGINEERING, MECHANICAL

Acta Mechanica Sinica Pub Date : 2025-05-28 DOI:10.1007/s10409-025-24653-x

Shutian Li (, ), Bin He (, ), Guoping Wang (, ), Tang Li (, ), Zhihuan Zhan (, ), Xiaoting Rui (, )

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Abstract

Underwater launch is a transient vibration process under the impact load. The hydrodynamic calculation is an important part of equipment research. In this paper, firstly, combining the theory of the Euler-Bernoulli beam and the potential flow, the transfer equation of the Euler-Bernoulli beam considering the hydroelastic effect is derived, which expands the application scope of the transfer matrix. The correctness of the transfer matrix for the beam with hydroelastic behaviors is verified by comparison with the results of the finite element analysis. Then the dynamics model of the underwater launch system is established based on the multibody system transfer matrix method, and the beam with hydroelastic behaviors is employed as the external vehicle. Subsequently, the overall transfer and dynamic equation are derived, resulting in the solution of the wet natural frequency and the dynamic response under the impact load. The comparison with experimental data validates the dynamics model and simulation results and ensures its reliability in practical applications. The dynamic of the system demonstrates that the launching interval and adjacent tube effect will exert an influence on the subsequent emission. This research provides a fast and efficient method for the dynamic calculation of the underwater launch system.

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冲击载荷下水下发射系统的动力学建模与仿真

水下发射是在冲击载荷作用下的瞬态振动过程。水动力计算是设备研究的重要组成部分。本文首先将欧拉-伯努利梁理论与位流理论相结合，推导了考虑水弹性效应的欧拉-伯努利梁传递方程，拓展了传递矩阵的应用范围。通过与有限元分析结果的对比，验证了该传递矩阵对具有水弹性特性梁的正确性。然后基于多体系统传递矩阵法建立了水下发射系统的动力学模型，采用具有水弹性特性的梁作为外载体；随后，推导了整体传递方程和动力方程，得到了湿固有频率和冲击荷载作用下的动力响应的解。通过与实验数据的比较，验证了动力学模型和仿真结果，保证了其在实际应用中的可靠性。系统动力学分析表明，发射间隔和相邻管效应对后续发射有一定影响。该研究为水下发射系统的动力学计算提供了一种快速有效的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Mechanica Sinica 物理-工程：机械

CiteScore

5.60

自引率

20.00%

发文量

1807

审稿时长

4 months

期刊介绍： Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences. Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences. In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest. Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics