张斐, 张春辉, 张磊, 王志军, 周春桂. 多次水下爆炸作用下钢板动态响应数值模拟[J]. 中国舰船研究, 2019, 14(6): 122-129. DOI: 10.19693/j.issn.1673-3185.01431
引用本文: 张斐, 张春辉, 张磊, 王志军, 周春桂. 多次水下爆炸作用下钢板动态响应数值模拟[J]. 中国舰船研究, 2019, 14(6): 122-129. DOI: 10.19693/j.issn.1673-3185.01431
Zhang Fei, Zhang Chunhui, Zhang Lei, Wang Zhijun, Zhou Chungui. Numerical simulation of dynamic response of steel plate subjected to multiple underwater explosions[J]. Chinese Journal of Ship Research, 2019, 14(6): 122-129. DOI: 10.19693/j.issn.1673-3185.01431
Citation: Zhang Fei, Zhang Chunhui, Zhang Lei, Wang Zhijun, Zhou Chungui. Numerical simulation of dynamic response of steel plate subjected to multiple underwater explosions[J]. Chinese Journal of Ship Research, 2019, 14(6): 122-129. DOI: 10.19693/j.issn.1673-3185.01431

多次水下爆炸作用下钢板动态响应数值模拟

Numerical simulation of dynamic response of steel plate subjected to multiple underwater explosions

  • 摘要:
      目的  为了提升多次水下爆炸载荷作用下舰船结构的抗爆性能,给出一种模拟多次水下爆炸的数值方法。
      方法  通过试验与数值仿真相结合的方法研究多次水下爆炸载荷作用下直径为600 mm、厚为5 mm的背空固支45#钢板的动态响应,得到钢板的塑性变形历程并分析其塑性变形规律。
      结果  结果表明:背空固支45#钢板在多次水下爆炸载荷作用下的塑性变形形貌呈类球冠形,变形模式以弯曲变形和双向拉伸变形为主。药量与爆距一定时,钢板中心挠度增量随着水下爆炸加载次数的增加而逐渐减小,且第二次爆炸加载后挠度增量为首次爆炸加载后挠度的1/3。总药量不变时,与多次均匀水下爆炸加载结果相比,单次水下爆炸加载后钢板的挠度与厚度减薄率均偏大,中心挠度最大相差20.25%。
      结论  试验与仿真结果具有较好的一致性,研究结果可为舰船防护设计提供参考。

     

    Abstract:
      Objectives  In order to improve the anti-explosion performance of ship structures subjected to multiple underwater explosion loading, and obtain a numerical method for simulating multiple underwater explosions is proposed.
      Methods  The dynamic response of the 45# clamped air-back steel plate with diameter of 600 mm and thickness of 5 mm subjected to multiple underwater explosion loading was studied by a method of combining experiment and numerical simulation. The plastic deformation history of the steel plate was obtained and the basic law of plastic deformation was analyzed.
      Results  The results show that the morphology produced by plastic deformation of the 45# clamped air-back steel plate subjected to multiple underwater explosion loading is spherical-like, and the deformation mode is mainly bending deformation and biaxial tensile deformation. When the amount of explosive and the explosion distance are fixed, the deflection increment of the center of the steel plate will be decreased gradually as the number of underwater explosion loading increased, and after the second explosion loading, the deflection increment will be third-order of the first explosion loading. When the total amount of explosive is constant, compared with the results of multiple uniform underwater explosion loading, both the deflection and thickness reduction rate of the steel plate after single underwater explosion loading are larger, and the maximum difference of the center deflection is 20.25%.
      Conclusions  The experimental results agree well with the simulation results, which can provide certain reference for ship protection design.

     

/

返回文章
返回