舰船冲击谱若干计算方法比较研究  

Comparative Study on Several Calculation Methods for Ship's Shock Spectra

作　　者：谢浩 冯麟涵[2] 吴静波[2] 李晓文[1] 郭君[1] XIE Hao;FENG Ling-han;WU Jing-bo;LI Xiao-wen;GUO Jun(College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China;92537 Unit of PLA, Beijing 100007, China)

机构地区：[1]哈尔滨工程大学船舶工程学院 [2]中国人民解放军92537部队

出　　处：《噪声与振动控制》2017年第4期115-120,共6页Noise and Vibration Control

基　　金：工信部高技术船舶资助项目;黑龙江省博士后科研启动基金资助项目(LBH-Q16054)

摘　　要：在水下爆炸冲击载荷作用下,舰船通常采用冲击谱来考核设备抗冲击性能。但由于没有统一计算标准,不同工程人员采用冲击谱的算法不同,得到的计算结果差异很大。针对现在已有冲击谱的不同计算方法,分别采用直接积分法、递归法、三次样条法、递归滤波法等计算方法对滤波后的信号求解冲击谱,通过改变采样频率和采样精度分析不同计算方法的使用条件、精度、效率。结果表明在采样精度一定时,与其他方法相比,递归法、递归滤波法计算效率高、稳定性好,适合实际工程使用。The shock spectrum is usually used to assess impact resistant performance of the equipment under underwater explosion.But,there are several computation methods currently and different algorithms for the shock spectra will lead to quite different calculation results.In this paper,based on different calculation methods,such as direct integration,recursive method,cubic spline method and recursive filtering method,the shock spectra of the filtered signals are solved.The conditions,precision and efficiency of the different calculation methods are analyzed by changing the sampling frequency and sampling precision.The results show that the recursive method and recursive filtering method are more efficient and stable than the other methods in the case of the same sampling precision and are suitable for practical engineering application.

关 键 词：振动与波 冲击谱 直接积分法 递归法 三次样条法 递归滤波法 

分 类 号：O175.1[理学—数学]