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兵工学报 ›› 2024, Vol. 45 ›› Issue (1): 206-218.doi: 10.12382/bgxb.2022.0503

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带椭球形气囊航行体落水-上浮过程仿真

包健1, 马贵辉1,*(), 孙龙泉1, 陈惟楚2, 李明3   

  1. 1 哈尔滨工程大学 船舶工程学院 复杂动力学与控制创新中心, 黑龙江 哈尔滨 150001
    2 中国航发商用航空发动机有限责任公司, 上海 200241
    3 北京宇航系统工程研究所, 北京 100076
  • 收稿日期:2022-06-09 上线日期:2024-01-30
  • 通讯作者:
  • 基金资助:
    国家自然科学基金青年科学基金项目(52001095); 中国博士后科学基金特别资助项目(2022T150154); 国家自然科学基金企业创新发展联合基金重点支持项目(U20B2005)

Simulation of Falling-floating Process of Vehicle with Ellipsoidal Airbags

BAO Jian1, MA Guihui1,*(), SUN Longquan1, CHEN Weichu2, LI Ming3   

  1. 1 Complex Dynamics and Control Innovation Center, College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China
    2 AECC Commercial Aircraft Engine Co., Ltd., Shanghai 200241, China
    3 Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China
  • Received:2022-06-09 Online:2024-01-30

摘要:

针对水下发射模型试验中的模型低速落水问题,提出一种带椭球形气囊的航行体落水回收方案,两个气囊等距分布在航行体两侧,航行体与气囊之间用连接带相连。数值仿真基于Abaqus的耦合欧拉-拉格朗日方法,通过对比AUV头段入水的试验结果和仿真结果,验证数值方法的有效性。分析在不同姿态角和不同初始囊压的条件下,带气囊航行体低速落水后的运动过程、囊压变化以及连接带的受力情况。研究结果表明,航行体姿态角是影响落水-上浮过程的最重要因素,初始囊压次之;对于最大落水深度、囊压峰值、拉力峰值而言,趋于垂直落水的工况更加危险,最大落水深度为1.33倍航行体长度,最大囊压为3.7倍基准囊压,连接带最大拉力为2.2倍航行体重力。这些结论可为航行体落水回收的方案设计与结构参数设计提供参考依据。

关键词: 航行体, 气囊, 落水冲击, 耦合欧拉-拉格朗日方法

Abstract:

A recovery scheme of vehicle with ellipsoidal airbags is proposed for the problem of model falling into the water at low speed in the underwater launch model test. The numerical simulation is based on Abaqus coupled Eulerian-Lagrangian method, and the effectiveness of the numerical method is verified by comparing the numerical and experimental results of the AUV head section entering into the water. The motion process of the vehicle with airbags entering the water at low speed, the change of airbag pressure and the force of the connecting belt under the conditions of different attitude angles and different initial airbag pressures are analyzed. The results show that the attitude angle of vehicle is the most important factor affecting the falling-floating process, followed by the initial airbag pressure. For the maximum depth of falling into the water, the peak value of airbag pressure and the peak value of pulling force, the condition that tends to fall vertically is more dangerous, the maximum depth of falling into the water is 1.33 times the length of vehicle, the maximum airbag pressure is 3.7 times the baseline airbag pressure, and the maximum pulling force of connecting belt is 2.2 times the gravity of vehicle. These conclusions can provide a reference for the design of recovery scheme and structural parameters for the vehicles falling into the water.

Key words: vehicle, airbag, water-entry impact, coupled Eulerian-Lagrangian method

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