封闭空间内爆载荷下结构响应试验及仿真研究
Experimental and simulation research on structural response under blast load in confined space
徐敬博 1卢安格 2周沪 2郑成 3孔祥韶3
作者信息
- 1. 中国船舶及海洋工程设计研究院,上海 200011;武汉理工大学船海与能源动力工程学院,湖北武汉 430063
- 2. 武汉理工大学船海与能源动力工程学院,湖北武汉 430063;武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心,湖北武汉 430063
- 3. 武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心,湖北武汉 430063
- 折叠
摘要
TNT在封闭空间内爆炸会发生燃烧反应并释放大量的能量,这些附加能量会对内爆载荷起到增强作用,为分析封闭空间内爆炸载荷作用下的结构动态响应.开展封闭空间爆炸试验,通过试验数据对称性验证,说明试验中压力测试结果准确可靠;然后开展数值计算研究,并探讨板厚、屈服应力和边界约束3个因素对靶板结构动态响应的影响.数值计算与试验结果的准静态压力吻合较好,靶板中心点初始峰值位移和最终位移的误差均小于5％,验证数值计算方法的可靠性;靶板中心点初始峰值位移和最终位移增大比例与板厚减小比例相当;靶板中心点初始峰值位移减小比例约为屈服应力增大比例的0.2倍,而最终位移的减小比例约为屈服应力增大比例的0.4倍.所采用的数值计算方法能够很好地模拟结构在封闭空间爆炸载荷作用下的响应,可为舰船抗爆结构设计提供一定参考.
Abstract
TNT explosives will undergo combustion reactions and release a large amount of energy when exploded in confined space.These additional energy will enhance the confined blast load,in order to analyze the dynamic response of the structure under explosive load in the confined space.A confined space explosion test was conducted,and the symmetry of the test data was verified to demonstrate the accuracy and reliability of the pressure test results.Numerical calculations were conducted to investigate the effects of plate thickness,yield stress,and boundary constraints on the dynamic response of the target plate structure.The quasi-static pressure of the numerical calculation and experimental results were in good agreement,and the errors between the initial peak displacement and the final displacement of the target plate center point were less than 5％,proving the reliability of the numerical calculation method.The proportion of initial peak displacement and final dis-placement increase at the center point of the target plate was equivalent to the proportion of plate thickness decrease.The proportion of initial peak displacement reduction at the center point of the target plate was about 0.2 times the proportion of yield stress increase,while the proportion of final displacement reduction was about 0.4 times the proportion of yield stress increase.The numerical calculation method used can effectively simulate the response of the structure under blast load in confined space,providing a certain reference for the design of ship anti explosion structures.
关键词
内爆载荷/结构响应/爆炸试验/燃烧效应Key words
confined blast load/structural response/explosion test/afterburning effect引用本文复制引用
出版年
2024
NETL
NSTL
万方数据