基于多介质ALE算法的柱体高速垂直入水仿真

汪 振; 吴茂林; 孙玉松; 彭京徽

doi:10.11993/j.issn.2096-3920.2020.01.012

基于多介质ALE算法的柱体高速垂直入水仿真

doi: 10.11993/j.issn.2096-3920.2020.01.012

海军工程大学兵器工程学院, 湖北武汉, 430033

详细信息

作者简介:
汪振(1995-), 男, 在读硕士, 研究方向为武器系统运用与保障.

中图分类号: TJ630.2; TB115
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- 文章访问数: 366
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- 被引次数: 0
出版历程
- 收稿日期: 2018-12-06
- 修回日期: 2019-01-04
- 刊出日期: 2020-02-29

Multi-Medium ALE Algorithm-Based Simulation of Vertical and High-Speed Water Entry of Cylinder

College of Weaponry Engineering, Navy University of Engineering, Wuhan 430033, China

摘要

摘要: 针对未来海上平台发射的大口径平头回转体高速入水过载问题, 为了探究柱体头部圆倒角大小对柱体垂直入水的动力学响应, 使圆倒角平头柱体外形设计满足高速入水强度要求, 文中通过入水载荷及空泡验证了任意拉格朗日-欧拉(ALE)算法计算此类问题的正确性。并应用该算法对速度为300 m/s的不同倒角柱体垂直入水进行数值仿真, 得到其入水冲击作用下的动力学响应。通过对入水过程中柱体速度和加速度的分析, 得出如下结论: 入水初期, 随着柱体头部倒角的增大, 速度的衰减越来越小; 柱体入水时受到的冲击加速度会出现振荡; 一定尺寸的圆倒角能有效减小柱体入水时的冲击加速度, 球头柱体入水的冲击加速度峰值最小, 在数值上不到平头柱体的1/10; 平头柱体垂直入水的载荷峰值与其头部圆顶面积呈线性正相关。以上方法及结论可为柱状结构体入水冲击过程研究以及高速入水回转体外形设计提供一定参考。
- 柱体 /
- 垂直入水 /
- 高速 /
- 任意拉格朗日-欧拉算法 /
- 倒角
Abstract: Aiming at the problem of high-speed water entry load of large-caliber flat-head revolving body launched by offshore platform in the future, the validity of the multi-medium arbitrary Lagrange-Euler(ALE) algorithm for calculating such problems is verified via water entry load and cavity in order to investigate the dynamic response of the round chamfer of cylinder head to the vertical water entry of the cylinder, so as to make the shape design of flat-headed cylinder with the round chamfer meet the requirement for high-speed water entry strength. The vertical water entry process of the cylinders with different chamfers at a velocity of 300 m/s is numerically simulated, and the dynamic responses under the impact of water entry are obtained. By analyzing the velocity and acceleration of the cylinder in water entry, conclusions are drawn as follows: 1) In the initial stage of water entry, with the increase of the cylinder head chamfer, the attenuation of velocity becomes smaller; 2) The impact acceleration of the cylinder oscillates as it enters water; 3) The round chamfer of a certain size can effectively reduce the impact acceleration of the cylinder when it enters the water, and the peak value of impact acceleration of spherical-headed cylinder entering water is less than one tenth of that of flat-headed cylinder; and 4) The peak load of a flat-headed cylinder in vertical water entry process is linearly and positively correlated with the area of its head dome. This study may provide reference for the research on the impact process of cylindrical structure and the design of high-speed body.
- cylinder /
- vertical water entry /
- high speed /
- multi-media arbitrary Lagrange-Euler(ALE) algorithm /
- chamfer

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参考文献(14)

[1]	王永虎, 石秀华. 入水冲击问题研究的现状与进展[J]. 爆炸与冲击, 2008, 28(3): 276-282. Wang Yong-hu, Shi Xiu-hua. Research Status and Progress of Water Impulse Problem[J]. Explosion and Shock Waves, 2008, 28(3): 276-282.
[2]	秦洪德, 赵林岳, 申静．入水冲击问题综述[J]．哈尔滨工业大学学报, 2011, 43(S1): 152-157． Qin Hong-de, Zhao Lin-yue, Shen Jing. Review of Water Entry Problem[J]. Journal of Harbin Institute of Technology, 2011, 43(S1): 152-157．
[3]	顾建龙, 张志宏, 郑学龄, 等. 弹体入水弹道研究综述[J]．海军工程大学学报, 2000, 90(1): 152-157． Gu Jian-long, Zhang Zhi-hong, Zheng Xue-ning, et al. Summary of Research on Inlet Trajectory of Projectile[J]. Journal of Naval University of Engineering, 2000, 90(1): 152-157．
[4]	Von Karman T. The Impact of Seaplane Floats during Landing[C]//NACA Technical Notes 321. Washington DC, USA: National Advisory Committee for Aeronautics, 1929.
[5]	Wagner V H. Phenomena Associated with Impacts and Sliding on Liquid Surfaces[J]. Z Angew Math Mech, 1932, 12(4): 193-215.
[6]	魏卓慧, 王树山, 马峰, 等. 刚性截锥形弹体入水冲击载荷[J]. 兵工学报, 2010, 31(1): 118-120. Wei Zhuo-hui, Wang Shu-shan, Ma Feng, et al. Diving Impact Load of Rigid Truncated Conical Projectile[J]. Acta Armamentarii, 2010, 31(1): 118-120.
[7]	陈诚, 袁绪龙, 党建军, 等. 超空泡航行器20°角倾斜入水冲击载荷特性试验研究[J]. 兵工学报, 2018, 39(6): 1159-1163. Chen Cheng, Yuan Xu-long, Dang Jian-jun, et al. Experi-mental Investigation into Impact Load during Oblique Water-entry of a Supercavitating Vehicle at 20°[J]. Acta Armamentarii, 2018, 39(6): 1159-1163.
[8]	路丽睿, 魏英杰, 王聪, 等. 不同头型射弹倾斜入水空泡及弹道特性进行了试验研究[J]. 兵工学报, 2018, 39(7): 1364-1371. Lu Li-rui, Wei Ying-jie, Wang Cong, et al. Experimental Investigation into the Cavity and Ballistic Characteristics of Low-speed Oblique Water Entry of Revolution Body[J]. Acta Armamentarii, 2018, 39(7): 1364-1371.
[9]	黄志刚, 孙铁志, 杨碧野, 等. 平头椎形回转体高速入水结构强度数值分析[J]. 爆炸与冲击, 2019, 39(4): 121-128. Huang Zhi-gang, Sun Tie-zhi, Yang Bi-ye, et al. Numerical Analysis of Strength of High-speed Inflow Structures of Plane-head Cone-type Rotating Body[J]. Explosion and Shock Waves, 2019, 39(4): 121-128.
[10]	李上明, 屈明. 基于ALE方法的楔形体入水分析[J]. 计算机辅助工程, 2018, 27(3): 48-53. Li Shang-ming, Qu Ming. Wedge Water Entry Analysis Based on ALE Method[J]. Computer Aided Engineering, 2018, 27(3): 48-53.
[11]	LSTC. LS-DYNA Keyword User’s Manual Volume I R 8.0[DB/OL]. (2015-03-01)[2018-12-15]. http://www. lstc. com/download/manuals/LS-DYNA_Manual_Volume_I_R8.0.pdf.
[12]	LSTC. LS-DYNA Keyword User’s Manual Volume II Material Models R 8.0[DB/OL]. (2015-03-01)[2018-12-15]. http://www.lstc.com/download/manuals/LS-DYN A_Manual_Volume_II_R8.0.pdf.
[13]	Lee M, Longoria R G, Wilson D E. Cavity Dynamics in High-speed Water Entry[J]. Phys. Fluid, 1997, 9(3): 540-550.
[14]	May A. Water Entry and the Cavity-running Behavior of Missiles ADA020429[R]. Maryland: White Oak Laboratory, 1975.