摘要
舰载设备在进行抗水下爆炸冲击设计时首先需要确定基础冲击时域信号作为输入载荷。相关标准规范给出的设计冲击谱不能反映实船水下爆炸冲击信号的动态特性。而实船试验测试数据又不具备标准性。为获取舰载设备仿真校核评估的冲击输入载荷,提出一种舰艇水下爆炸冲击信号拟合方法。根据标准设计冲击谱,通过傅里叶变换对实测信号进行修正。采用这种方法得到的冲击信号同时包含了设备安装部位的冲击特性和标准设计谱的冲击量值,能够更准确地反映舰载设备在特定安装部位处的标准冲击环境。
The basic shock signal should be evaluated for the shock design of naval ship components.The shock response spectrum specified in the standard norm usually cannot reflect the complex dynamic characteristics of the shock data recorded in ship shock tests.A curre fit method for naval underwater explosion shock signal was developed to get more approprite input load signal for anti-shock simulation and evaluation of naval equipments.Fourier transform was adopted to modify the measured signal curve for fitting in with the corresponding shock response spectrum in standard design.The corrected shock signal keeps both the real shock property and the shock magnitude of the standard design spectrum,which can more accurately represent the naval vessel shock environment at specification position under real underwater explosion shock excitation.
出处
《振动与冲击》
EI
CSCD
北大核心
2010年第3期182-184,共3页
Journal of Vibration and Shock
基金
国家自然科学基金项目(10672181)
关键词
水下爆炸
冲击信号
冲击谱
傅里叶变换
underwater explosion
shock signal
shock response spectrum
fourier transform
