多次水下爆炸作用下钢板与焊接钢板冲击损伤特性  

Impact damage of steel plate and welding steel plate under multiple Underwater Explosions

作　　者：张斐 张春辉[1] 张磊 王志军 李旭东[1,2] ZHANG Fei;ZHANG Chunhui;ZHANG Lei;WANG Zhijun;LI Xudong(Naval Research Academy,Beijing 100161,China;School of Mechanical Engineering,North University of China,Taiyuan 030051,China;The 710 Research Institute,China Shipbuilding Industry Corporation,Yichang 443003,China)

机构地区：[1]海军研究院,北京100161 [2]中北大学机电工程学院,太原030051 [3]中国船舶重工集团公司第710研究所,湖北宜昌443003

出　　处：《振动与冲击》2020年第7期196-201,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(11572291)。

摘　　要：为了研究舰船结构在多次水下爆炸载荷作用下的抗爆抗冲击能力,基于水下爆炸鼓胀试验分别开展了5 mm、12 mm的船用A32背空钢板及焊接板的多次水下爆炸试验,得到了钢板与焊接板的塑性变形历程,测量并计算了钢板与焊接板受冲击区域沿半径各点处的挠度及厚度减薄率,分析了钢板与焊接板的塑性变形规律。结果表明:多次水下爆炸载荷作用下,焊接板与钢板的塑性变形形貌呈类球冠形,二者的厚度减薄率从中心位置到边界处呈先减小再增大的趋势,但焊接板的挠度小于钢板的挠度。A32钢板的变形模式主要为弯曲和拉伸变形,焊接板以弯曲变形为主。持续增加的水下爆炸载荷导致钢板中心位置与边界处拉伸断裂,而焊接板的焊缝及其热影响区发生脆性断裂。In order to study the anti-explosion and anti-shock ability of warship structure under multiple underwater explosion loads,several underwater explosion tests of marine A32 backspace steel plate and welding plate of 5mm and 12 mm were carried out based on the underwater explosion bulging test,the plastic deformation history of steel plate and welding plate was obtained,the deflection and thickness reduction rate of the points along radius in impact area of steel plate and welding plate were measured and calculated.The plastic deformation law of steel plate and welding plate was analyzed.The results show that under the action of multiple underwater explosion loads,the plastic deformation morphology of welding plate and steel plate is in the shape of spherical crown,and their thickness reduction rate decreases at first and then increases from the center position to the boundary.But the deflection of the welding plate is less than that of the steel plate.The deformation mode of A32 steel plate is mainly bending and stretching,and the welding plate is mainly bending.The continuous increase of underwater explosion load leads to the tensile fracture at the center and boundary of the steel plate,while the brittle fracture occurs in the weld and its heat-affected zone of the welding plate.

关 键 词：水下爆炸 固支圆板 焊接板 塑性变形 破坏模式 

分 类 号：O383[理学—流体力学]