水下爆炸下典型舰船结构整体损伤模式表征方法及图谱研究

张弛; 刘凯; 李海涛; 梅志远; 郑欣颖

doi:10.11883/bzycj-2021-0200

水下爆炸下典型舰船结构整体损伤模式表征方法及图谱研究

doi: 10.11883/bzycj-2021-0200

海军工程大学舰船与海洋学院，湖北武汉 430033

基金项目: 国家自然科学基金（51679244）

详细信息

作者简介:
张　弛（1997－　），男，硕士研究生，zc_nue@163.com

通讯作者:
李海涛（1979－　），男，博士，副教授，navy_lht@163.com

中图分类号: O383.3；U661.4
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- 文章访问数: 435
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- 被引次数: 0
出版历程
- 收稿日期: 2021-05-19
- 修回日期: 2021-12-16
- 网络出版日期: 2022-05-13
- 刊出日期: 2022-06-24

Study on the characterization method and mode map of overall damage of typical warship structures subjected to underwater explosions

College of Naval Architecture and Ocean, Naval University of Engineering, Wuhan 430033, Hubei, China

摘要

摘要: 随着舰船抗爆炸冲击总体结构优化设计及水中兵器攻击效能评估研究的深入，建立水下中近距非接触爆炸作用下舰船整体损伤模式的快速判定方法尤为重要。通过Abaqus软件建立了爆炸冲击波和气泡联合作用下舰船结构整体损伤特性的数值模拟方法并进行了实验验证；分析了水下爆炸载荷强度及舰船结构强度等参数变化对结构整体损伤模式的影响，提出了综合反映爆炸冲击波和气泡联合作用的新型冲击强度因子C₄，表征舰船结构总体强度的结构强度因子S，初步构建了舰船整体损伤模式分布图谱C₄-S。研究结果表明，建立的数值方法能较好预测舰船结构整体损伤模式和总体变形，误差不超过10%；提出的两类因子能分别合理表征水下爆炸强度和舰船结构强度，构建的损伤模式分布图谱能较好区分不同爆炸强度、舰船结构强度下的舰船整体中拱、中垂、鞭状损伤模式，可实现对水下爆炸下舰船整体损伤模式的快速判定。
- 水下爆炸 /
- 舰船结构 /
- 损伤模式 /
- 冲击因子 /
- 图谱
Abstract: To develop the impact resistance technology of warship structures as well as to improve underwater weapon’s attack effectiveness, it is necessary to establish a method to rapidly judge and confirm the overall damage modes of the ship structure subjected to middle or near field underwater non-contact explosions. A numerical method was established using commercial software to analyze the overall damage characteristics of warship structures subjected to underwater explosion shock waves and bubble pulsation. An experiment was set up to verify the effectiveness of the method from both the overall damage mode and the deformation perspectives. By using this numerical method, the effects of the main structural strength parameters of the warship and the underwater explosion intensity on the overall damage modes of the warship were investigated. Based on the analysis of extensive experiments and numerical calculations, a factor C₄, which reflects the combined effect of a middle/near field underwater non-contact explosion shock wave and a bubble pulsation load, and a factor S, which contains the main structural parameters representing the overall strength of the ship structure, were proposed. The overall damage mode distribution map of ships was established using factor C₄ as the x-axis and factor S as the y-axis. The results show that the numerical analysis method can predict the overall damage mode and the deformation of ship structure with an error of less than 10%. The proposed two factors can reasonably characterize the underwater explosion intensity and the overall structural strength of the ship, respectively. The damage mode distribution map can distinguish the overall damage modes (the hogging damage, the sagging damage and the whipping response) of ships with different structural overall strengths subjected to different middle/near field underwater non-contact explosion intensities. The map can realize the rapid judgment on the overall damage modes of the ship subjected to underwater explosions.
- underwater explosion /
- ship structure /
- damage mode /
- shock factor /
- atlas

HTML全文

图 1 数值计算模型及网格

Figure 1. Numerical calculation models and meshes

下载: 全尺寸图片幻灯片

图 2 船体梁模型及水下爆炸实验布置示意图

Figure 2. Schematic of girder model and underwater explosion experimental layout

下载: 全尺寸图片幻灯片

图 3 船体梁中部垂向运动过程实验与数值模拟对比图（正值为中拱变形，负值为中垂变形）

Figure 3. Comparison between experiment and simulation process of vertical movement at middle of girder (positive value represents hogging deformation; negative value represents sagging deformation)

下载: 全尺寸图片幻灯片

图 4 船体梁中点位移时程曲线数值结果和实验结果对比

Figure 4. Comparison between numerical and experimental displacement-time curves at the girder’s mid-point

下载: 全尺寸图片幻灯片

图 5 沿长度方向船体梁垂向变形数值结果和实验结果对比

Figure 5. Comparison between numerical and experimental girder’s vertical deformations along longitudinal direction

下载: 全尺寸图片幻灯片

图 6 船体梁底部最终变形数值模拟和实验结果对比

Figure 6. Comparison between numerical and experimental final deformation of the girder’s bottom

下载: 全尺寸图片幻灯片

图 7 水下爆炸计算工况纵、横向点位布置示意图

Figure 7. Schematic of longitudinal and transverse layout of underwater explosion calculation case

下载: 全尺寸图片幻灯片

图 8 典型舰船中拱/中垂损伤模式示意图

Figure 8. Schematic of hogging and sagging damage mode of typical warship

下载: 全尺寸图片幻灯片

图 9 爆径比-结构强度因子整体损伤模式分布图谱

Figure 9. The ratio of standoff and maximum bubble radius-structural strength factor overall damage mode distribution atlas

下载: 全尺寸图片幻灯片

图 10 球面波修正的冲击因子-结构强度因子整体损伤模式分布图谱

Figure 10. The shock factor of spherical wave correction-structural strength factor overall damage mode distribution atlas

下载: 全尺寸图片幻灯片

图 11 新型冲击强度因子-结构强度因子整体损伤模式分布图谱

Figure 11. The new shock factor-structural strength factor overall damage mode distribution atlas

下载: 全尺寸图片幻灯片

表 1 Johnson-Cook本构模型及失效模型参数^[18]

Table 1. Johnson-Cook constitutive model and failure model parameters^[18]

A/GPa B/GPa C n m D₁ D₂ D₃ D₄ D₅

0.25 0.89 0.058 0.75 0.94 0.38 1.47 2.58 −0.0015 8.07

下载: 导出CSV

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