平头锥型回转体高速入水结构强度数值分析

黄志刚; 孙铁志; 杨碧野; 张桂勇; 宗智

doi:10.11883/bzycj-2017-0330

平头锥型回转体高速入水结构强度数值分析

doi: 10.11883/bzycj-2017-0330

黄志刚^1,,
孙铁志¹,
杨碧野¹,
张桂勇^{1, 2, 3, ,},
宗智^{1, 2, 3}

1.
大连理工大学船舶工程学院辽宁省深海浮动结构工程实验室，辽宁大连 116024
2.
大连理工大学工业装备结构分析国家重点实验室，辽宁大连 116024
3.
高新船舶与深海开发装备协同创新中心，上海 200240

基金项目: 国家自然科学基金(51579042, 51639003, 51709042)；国家“千人计划”青年项目(D1007001)；中央高校基本科研业务费专项资金(DUT16ZD218, DUT17ZD311, DUT16RC(3)085)

详细信息

作者简介:
黄志刚（1992－　），男，硕士研究生，1059283140@qq.com

通讯作者:
张桂勇（1978－　），男，博士，教授，gyzhang@dlut.edu.cn

中图分类号: O352
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- 文章访问数: 4589
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- PDF下载量: 61
- 被引次数: 0
出版历程
- 收稿日期: 2017-09-08
- 修回日期: 2018-01-10
- 网络出版日期: 2019-03-25
- 刊出日期: 2019-04-01

Numerical analysis on structural strength of a cone-shaped flatted revolution body during high-speed water-entry

HUANG Zhigang^1
,,
SUN Tiezhi¹,
YANG Biye¹,
ZHANG Guiyong^{1, 2, 3
, ,},
ZONG Zhi^{1, 2, 3}

1.
Liaoning Engineering Laboratory for Deep-Sea Floating Structures, School of Naval Architecture, Dalian University of Technology, Dalian 116024, Liaoning, China
2.
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, Liaoning, China
3.
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China

摘要

摘要: 为探究回转体在高速入水过程中的结构强度，基于非线性有限元LS-DYNA软件中流固耦合任意拉格朗日-欧拉(arbitrary Lagrangian-Eulerian, ALE)方法，分析了不同壁厚的回转体以100 m/s的初速度入水过程中的冲击力特性和结构强度。结果表明：数值计算得到的入水冲击压强峰值和速度衰减曲线与相应的理论值吻合较好，从而验证了数值方法的有效性；入水冲击载荷峰值出现在结构入水瞬间，结构入水后冲击载荷急剧变小且微小震荡；回转体的结构形式对其在高速入水过程中的结构强度有重要影响，尤其回转体头部厚度影响回转体结构强度，当回转体头部厚度为8 mm、后体壁厚大于2.5 mm时，可以保证回转体强度要求。
- 高速回转体 /
- 入水 /
- 结构强度 /
- 流固耦合
Abstract: In order to investigate the structural strength of a cone-shaped flatted revolution body during high-speed water-entry, based on the nonlinear finite element software LS-DYNA, which adopts the arbitrary Lagrangian-Eulerian (ALE) algorithm, the paper analyzes the characteristics of impact force and strength for the different structural revolution bodies with the initial velocity of 100 m/s. The results show that the peak impact pressure intensity and the velocity attenuation of the revolution body during water-entry agree well with the theoretical values, which can effectively verify the validity of the present numerical method. Besides, the peak value of the impact load occurs at the initial stage of the water-entry and the period is very short. After the revolution body enters the surface of the water, the impact load becomes smaller rapidly and changes slightly. The structural style of the revolution body has great effect on its strength during the water-entry, especially the head thickness of the revolution body. When the head thickness of the revolution body is 8 mm and the wall thickness of its afterbody is larger than 2.5 mm, the structure has no damage during the water-entry.
- high-speed revolution body /
- water entry /
- structure strength /
- fluid-structure interaction

HTML全文

图 1 计算域

Figure 1. Computational domain

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图 2 回转体几何模型

Figure 2. The geometrical model for a revolution body

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图 3 回转体头部中心区域压强曲线

Figure 3. Pressure intensity curve in the central head region of the revolution body

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图 4 回转体速度衰减曲线

Figure 4. Velocity attenuation of the revolution body over time

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图 5 流-构耦合力曲线

Figure 5. Fluid-structure interaction force varying with time

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图 6 在t=1.1 ms时回转体的应力分布

Figure 6. Stress distribution in the revolution body at t=1.1 ms

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图 7 在t=3.0 ms时回转体的应力分布

Figure 7. Stress distribution in the revolution body at t=3.0 ms

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图 8 回转体头部边缘单元应变曲线

Figure 8. Strain-time curve of the edge element for the head of the revolution body

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图 9 回转体头部边缘单元等效应力曲线

Figure 9. Equivalent stress-time curve of the edge element for the head of the revolution body

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图 10 t=0.89 ms时刻回转体的应力分布

Figure 10. Stress distribution in the revolution body at t=0.89 ms

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图 11 t=2.00 ms回转体应力图

Figure 11. Stress distribution in the revolution body at t=2.00 ms

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图 12 回转体头部边缘及中心单元应变随时间的变化

Figure 12. Strain-time curves of the edge and central elements for the head of the revolution body

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图 13 回转体头部边缘单元等效应力曲线

Figure 13. Equivalent stress-time curve of the edge element for the head of the revolution body

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图 14 回转体头部中心单元等效应力曲线

Figure 14. Equivalent stress-time curve of the central element for the head of the revolution body

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