摘要
针对舰船结构舱内爆炸响应实验中船用特种钢材价格昂贵、试验成本高等问题,开展舱内爆炸响应实验中普通钢材替代特种钢材的等效性研究。为确定不同材料靶板之间的等效关系,基于靶板结构中心变形相似原则,考虑靶板不破的情况下,结合薄板大变形理论分析,明确了板厚度与内爆响应的关系,提出靶板材料等效替换方法。运用有限元分析软件ATUODYN对封闭空间内爆炸载荷作用在921A钢、907A钢、Q235钢、Q355钢四种不同型号钢制靶板过程进行数值仿真,得到计算结果与试验结果最大误差值为5.6%,验证了数值仿真方法的正确性。通过对数值仿真计算得到的等效板厚进行拟合,结合不同材料靶板等效板厚与动态屈服强度之间的经验公式,验证了所提不同型号钢制靶板在舱内爆炸载荷作用下的等效方法具有合理性和良好的适用性,为用普通船用钢材替代船用特种钢材进行舱内爆炸实验提供了理论依据和数据参考。
Experimental investigation of internal explosion effects on ship structures still faces fundamental challenges.The prohibitively high costs of specialized naval steel plates impose disproportionate financial burdens on experimental budgets.Additionally,the restricted availability of standardized thickness variants has dimensional scaling conflicts during reducedscale internal explosion experiments.This research proposes an equivalent substitution method for scaled model testing.The methodology enables a strategic replacement of naval steel with conventional steel while maintaining response similitude during the internal explosion of ship structures.The primary research objective focuses on validating the equivalent substitution method for conventional steel as a replacement for specialized naval steel without degrading the accuracy of the recorded data.According to the principle of central deformation similarity,the equivalence relationship among target plates of different grades was established under the assumption of structural integrity during the explosion.Based on the theory of large deflection of thin plates,the relationship between plate thickness and deformation was clarified thoroughly.An equivalence substitution method for different plate grades was explained,and an equivalence substitution method for different plates was proposed.It provides a theoretical foundation for substituting specialized naval steel with conventional steel.Comprehensive numerical simulations were conducted using the finite element analysis software AUTODYN to validate the proposed method.The simulations modeled the dynamic response of four different grades of steel target plates(921A steel,907A steel,Q235 steel,and Q355 steel)under internal blast loading.The maximum deviation between the simulation results and experimental data is only 5.6%,thereby fully confirming the accuracy and reliability of the numerical model.The equivalence relationships among grades under internal blast loading with different charge volume ratios(0.1,0.2,0.4,0.8,and 1.0)were further explored through extensive numerical simulations involving four plates grades(Q235,Q355,907A,and 921A)with various thicknesses.A fitting analysis of equivalent plate thickness was conducted.By integrating empirical formulas correlating equivalent plate thickness with dynamic yield strength,the substituted target plate showed less than 10%deviation in central deformation compared to the original plate.The proposed equivalence method for steel target plates of different grades under internal explosion loads has been demonstrated to be both rational and practically applicable.This provides a theoretical foundation and empirical reference for substituting specialized naval steel with ordinary steel in internal explosion experiments.
作者
郑成
朱业飞
徐峰
卢安格
曹宇航
周沪
孔祥韶
ZHENG Cheng;ZHU Yefei;XU Feng;LU Ange;CAO Yuhang;ZHOU Hu;KONG Xiangshao(Green&Smart River-Sea-Going Ship,Cruise and Yacht Research Center,Wuhan University of Technology,Wuhan 430063,Hubei,China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,Hubei,China;China Ship Development and Design Center,Wuhan 430064,Hubei,China)
出处
《爆炸与冲击》
北大核心
2025年第12期40-53,共14页
Explosion and Shock Waves
基金
国家自然科学基金(12202329,52171318)
武汉市自然科学基金探索计划(晨光计划)(2024040801020258)。
关键词
舱内爆炸响应
靶板中心变形
板厚补偿
等效方法
structural response to internal explosion
central deformation similarity
thickness compensation
equivalence substitution method
