【作者】 郭君； 李晓文； 杨勇； 谢浩；

【Author】 GUO Jun;LI Xiao-wen;YANG Yong;XIE Hao;Harbin Engineering University,College of shipbuilding and ocean engineering;

【机构】 哈尔滨工程大学船舶工程学院；

【摘要】 舰船舱段试验是研究舰船冲击环境及舰载设备的抗冲击能力的重要手段,但舱段试验与整船试验结果存在相当的差异,差异产生的机理还不明确,二者之间的关系目前尚不明晰。本文以潜艇和水面舰船两种典型模型作为研究对象,通过理论分析和数值计算比较了舱段与整船水下爆炸冲击环境的差异,结果表明整船与舱段冲击环境差异主要集中于船体前三阶总振动所控制的低频段,初步阐明了二者冲击环境差异的分频分段机理。并基于此,提出了基于船体梁鞭状运动理论、经验模态分解法和舱段冲击环境数据的组合预报法,该方法可将舱段的试验或仿真数据合理的拓展到整船情况,设计谱平均误差不超过5%。该方法以其方便快捷的特点对舰船方案设计阶段的环境预报具有重要意义,同时,也为舰船设备抗冲击总布置和优化提供了方法。更多还原

【Abstract】 Ship cabin experiment is an important means to study the shock environment of ship and the anti-impact capability of shipboard equipment, however the results between entire ship and cabin test has considerable differences, the difference of the mechanism and the relationship of them is not clear yet. In this paper, submarines and surface ships are regarded as two typical models of the research object, the differences of whole ship and cabin shock environment underwater explosive are compared through theoretical analysis and numerical calculation, results show that the differences mainly concentrated in the low-frequency stage controlled by the former three total vibration of hull, preliminarily clarify the frequency segmentation mechanism of shock environmental differences. A combined forecasting method is put forward on the base of ship hull girder whipping motion theory, empirical mode decomposition method and the cabin shock environment data, the experiment or simulation data of cabin could be reasonable expanded to the whole ship by this method, and the average error of design spectrum is less than 5%. This method is of great significance to the environmental prediction of ship schematic design phase with its convenient characteristics. At the same time, it also provides a method for the general layout and optimization of ship equipment.更多还原