敷设超弹性覆盖层舰船水下爆炸冲击实验与仿真分析

章振华;谌 勇;肖 锋;华宏星;汪 玉

振动与冲击 ›› 2014, Vol. 33 ›› Issue (10) : 106-112.

PDF(2445 KB)
PDF(2445 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (10) : 106-112.
论文

敷设超弹性覆盖层舰船水下爆炸冲击实验与仿真分析

  • 章振华 ,谌 勇1,肖 锋1,华宏星1,汪 玉2
作者信息 +

Underwater explosion research on ships with hyper-elastic coating

  • ZHANG Zhen-hua1,CHEN Yong 1,XIAO Feng1,HUA Hong-xing1,WANG Yu2
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摘要

针对在船体湿表面敷设超弹性覆盖层,对减少远场水下爆炸冲击对舰船造成的损伤具有较好效果,而覆盖层为薄壁结构与舰船尺度不匹配,在有限元分析中易造成较大困难甚至无法计算问题,提出具有较高计算效率的仿真近似方法。该方法基于超弹性覆盖层均匀化理论,考虑应变率相关性,将覆盖层实体结构替换成等效连续体模型,对全舰船进行水下爆炸冲击响应仿真分析。对敷设、未敷设覆盖层水面实船进行水下爆炸对比试验,通过试验数据与仿真结果比较研究、分析讨论,对超弹性覆盖层抗冲击性能进行深入阐述。

Abstract

A polymer coating applied to the wet surface of a ship’s hull can reduce some types of damage to a ship subjected to a far-field underwater explosion (UNDEX). The polymer coating is a thin wall structure which applied to the wet surface of ship hull, but the ship is a relative large structure. The dimension mismatch between the coating and the ship results in difficulties in the simulation, and even that it is not feasible to mesh the detailed core geometry. Hence, an approximate simulation method for the full-scale ship with polymer coating is developed. Based on the homogenization theory of polymer coating, a continuum model which takes into account the strain-rate dependence is introduced in the full-scale ship model. The shock response subjected to UNDEX of the finite element ship model is investigated. In order to investigate the effectiveness of such coatings in blast-resistant design, full-scale UNDEX tests for a ship with and without polymer coating are performed. The results obtained from UNDEX tests and numerical simulation are compared and discussed. The blast-resistant property of polymer coating is elaborated.


关键词

超弹性覆盖层 / 水下爆炸 / 均匀化理论 / 应变率相关性 / 冲击响应谱

Key words

hyper-elastic coating / underwater explosion (UNDEX) / homogenization theory / strain-rate dependence / shock response spectrum

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章振华;谌 勇;肖 锋;华宏星;汪 玉. 敷设超弹性覆盖层舰船水下爆炸冲击实验与仿真分析[J]. 振动与冲击, 2014, 33(10): 106-112
ZHANG Zhen-hua;CHEN Yong;XIAO Feng;HUA Hong-xing;WANG Yu. Underwater explosion research on ships with hyper-elastic coating[J]. Journal of Vibration and Shock, 2014, 33(10): 106-112

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