摘要
海洋装备的跌落安全在日常勤务操作中至关重要。针对某装备全尺寸跌落的安全性,采用LSDYNA软件,建立了整体结构的有限元仿真计算模型,对整体结构从5 m高度水平跌落过程进行数值仿真分析,获取含能材料和各舱段的冲击响应规律。结果表明,整体结构在5 m水平跌落条件下,经多次反弹后各舱段材料内部产生塑性变形;含能材料在整体结构和地面碰撞点内腔对应位置处应力最大,含能材料内局部压力超过屈服强度产生变形,在整个碰撞过程中虽没有发生点火反应,但含能材料内部应力、温度和反应度数值有低幅变化,局部发生轻微化学反应。结合整体结构5 m水平跌落试验进行验证,试验结果与仿真结果趋于一致,不燃不爆。文中研究可有效指导海洋装备的安全性设计和工程研制。
The drop safety of marine equipment is of paramount importance in daily operational tasks.To assess the safety of a full-size drop of a certain type of equipment,a finite element simulation model of the overall structure was established using LS-DYNA software.The numerical simulation and analysis of the horizontal drop from a height of 5 meters were conducted to obtain the impact response characteristics of the energetic material and each compartment.The results show that under 5-meter drop conditions,after multiple rebounds,plastic deformation occurs within the materials of each compartment.The maximum stress of the energetic material is located at the corresponding position in the cavity at the collision point between the structure and the ground.When the local pressure inside the energetic material exceeds its yield strength,deformation occurs.Although no ignition reaction happens during the entire collision process,the internal stress,temperature,and reactivity values of the energetic material show slight fluctuations,and minor local chemical reactions occur.A verification test of the 5-meter horizontal drop using a full-size structure is conducted.The experimental results are consistent with the simulation results,confirming that the structure does not ignite or explode.This study can be applied to the safety analysis and assessment of fullsize drops for other marine equipment and can effectively guide the safety design and engineering development of such systems.
作者
王婷婷
沈永福
马军利
焦纲领
张剑
王亚伟
WANG Tingting;SHEN Yongfu;MA Junli;JIAO Gangling;ZHANG Jian;WANG Yawei(Unit 92228th,the Liberation Army of China,Beijing 100072,China;The 705 Research Institute,China State Shipbuilding Corporation Limited,Xi’an 710077,China)
出处
《水下无人系统学报》
2025年第4期657-663,共7页
Journal of Unmanned Undersea Systems
关键词
海洋装备
安全性
跌落
全尺寸
冲击响应
含能材料
marine equipment
safety
drop
full-size
impact response
energetic material
