结构物入水冲击表面压力的模型研究及应用  

MODEL STUDY AND APPLICATION ON SURFACE PRESSURE MEASUREMENT OF STRUCTURE WATER ENTRY

作　　者：张岳青[1,2] 徐绯[2] 李建辰 李建芬 

机构地区：[1]中船重工集团公司第705研究所,西安710075 [2]西北工业大学航空学院,西安710072

出　　处：《机械强度》2017年第1期33-39,共7页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(11272266);陕西省博士后科研项目资助~~

摘　　要：结构物在入水过程中表面不同部位会受到不同程度的冲击,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。以楔形体和弧形体为研究对象,进行了自由下落多工况的入水冲击试验,对PVDF压电传感器进行了静动态参数标定,采用该压电传感器采集了结构物入水表面的压力分布值。然后运用LS-DYNA软件对试验工况结构物入水工况进行了数值仿真,对压力的测量结果做了进一步验证,并分析了不同因素对结构表面压力的影响。最后依据相似准则,通过试验模型的数据得到实际飞机结构的入水冲击响应,对入水结构的设计具有一定的参考价值。There will be different loads along the structure surface when it impacts on the water,which has an important effect on the safety of the capsule structure and the people inside. So the research of water impact has a practical significance in the field of aerospace and military. Base on wedge and arc body model,the test of free fall on the water has been investigated on different situations. Firstly the parameter of PVDF is calibrated in the static and dynamic state,using which the distribution of surface pressure is obtained. Then different situations of the experiment are simulated by LS-DYNA and the test pressures are proved further. The pressures are analyzed by different factors. Finally base on the similarity criteria,the impact response of real aircraft structure are obtained by the test data,which has a valuable reference for the design of structure.

关 键 词：入水冲击 PVDF 标定 压力 相似准则 

分 类 号：V423.5[航空宇航科学与技术—飞行器设计]