楔形体入水冲击响应的试验研究及应用  

EXPERIMENTAL STUDY AND APPLICATION ON WATER IMPACT RESPONSE OF WEDGE-SHAPED STRUCTURE

作　　者：张岳青[1] 徐绯[1] 金思雅 王永虎[1,2] 

机构地区：[1]西北工业大学航空学院,西安710072 [2]中国民航飞行学院,广汉618307

出　　处：《机械强度》2015年第2期226-231,共6页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(11272266);国家自然科学基金民航联合基金项目(U1333133)资助~~

摘　　要：结构物在入水过程中会受到较大的冲击载荷,严重影响结构和结构内部人员的安全,因此入水问题的研究在航空航天和军事领域具有实际意义。以简单的楔形体为研究对象,进行了垂直入水的冲击试验,采用高速摄像机采集了楔形体入水过程的图像,并且考察楔形体入水过程的加速度的响应,通过滤波消除高频信号,得到合理的加速度响应值。结果表明:楔形体密闭空腔对加速度响应有重要影响。依据相似准则,通过试验模型的数据,预测了实际大尺寸的飞机结构的入水冲击响应,研究结果对入水结构的设计具有一定的参考价值。There will be a big load on the structure when it impacts on the water, which has an important effect on the safety of the capsule structure and the people inside. Therefore, the research of water impact has a practical significance in the aerospace and military fields. Base on a simple wedge model, the test of wedge falling on the water has been vertically investigated. The photographs of wedge into water are recorded by the high speed camera. The acceleration response of wedge impact on the water is studied and the reasonable value of acceleration is obtained by filtering. These results indicated that it can be clearly found that the airtight cavity of wedge has a great influence on the acceleration. According to the similarity criteria, the impact response of real aircraft structure is predicted by the testing data, which has a valuable reference for the design of water entry structure.

关 键 词：楔形体 入水 加速度 密闭空腔效应 相似准则 

分 类 号：V423.5[航空宇航科学与技术—飞行器设计]