摘要
借助数值仿真的手段,采用通用有限元软件ABAQUS建立水下爆炸声固耦合方法,模拟水下非接触爆炸作用下舰船冲击响应特性,并通过实船实验数据进行对比,该方法可较好地模拟水下爆炸舰船的冲击环境。在此基础上,计算水下爆炸作用下全船纵向冲击谱值分布规律,总结并拟合出具备一定通用性的数学模型,可用于冲击环境的初步预报。同时得到了全船冲击环境沿垂向位置的分布情况,以及冲击环境随不同攻角条件下的变化规律,为舰船结构的抗冲击设计提供参考。
Here,numerical simulation and acoustic-structure coupling methods based on ABAQUS were used to simulate the dynamic response of a hull subjected to non-contact underwater explosion.Comparing the simulation data with experimental ones,it was shown that the proposed methods can simulate and predict better the shock environment of warships under the action of underwater explosion.Furthermore,the longitudinal shock spectra distribution laws of the hull under the action of underwater explosion were computed and the mathematical models with some level of generality were established to predict the shock environment.The vertical distribution laws of the hull＆#39;s shock environment and its change laws under conditions of different attack angles were obtained.The study results provided a reference for shock-resistant design of warships.
出处
《振动与冲击》
EI
CSCD
北大核心
2015年第17期88-93,共6页
Journal of Vibration and Shock
基金
国家自然科学基金青年基金项目(51409129
U1430236)
江苏省自然科学基金青年基金项目(BK20140504)
关键词
冲击环境
水下爆炸
数学模型
声固耦合
shock environment
underwater explosion
mathematical models
acoustic-structure coupling
