基于本征函数的舰船冲击环境工程化预报方法
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摘要
对舰船冲击环境理论解分析,通过数值试验建立了一种冲击环境工程化预报方法。通过分离变量法将冲击环境的预报分为特征谱速度和冲击环境本征方程两部分。特征谱速度主要与外载荷参数及舰船尺度特性相关,反映冲击载荷对冲击环境的影响程度;冲击环境本征方程与系统固有特性有关,描述冲击环境在船体结构中的衰减规律。通过典型舰船冲击环境数据对预报公式中的参数进行了分析。最后,将建立的预报方法与实船试验得到的结果进行了对比,表明了该方法的合理性和适用性,可为舰船在早期设计阶段开展抗冲击设计提供参考。
Based on the theoretical solution of ship impulsive environment,an engineering prediction method is constructed through numerical experiments.The prediction of ship impulsive environment is divided into two parts: specific spectral velocity and empirical eigenfunction with the variables separation method.The specific spectral velocity is mainly related to applied load parameters and ship scale characteristics,and reflects the contribution of shock loading to impulsive environment.The eigenfuntion of impulsive environment is related to inherent characteristics of the system,and describes the decaying rules of impulsive environment in ship structure.Parameters in the prediction function are analyzed on the basis of numerical data of typical ships.Finally,a comparison between ship trial and results obtained by the method presented in this paper is made and detonates that the rationality and applicability of the present method.This engineering prediction method can supply a fairly satisfied reference for shock resistance design in the early phase of ship design.
Based on the theoretical solution of ship impulsive environment,an engineering prediction method is constructed through numerical experiments.The prediction of ship impulsive environment is divided into two parts: specific spectral velocity and empirical eigenfunction with the variables separation method.The specific spectral velocity is mainly related to applied load parameters and ship scale characteristics,and reflects the contribution of shock loading to impulsive environment.The eigenfuntion of impulsive environment is related to inherent characteristics of the system,and describes the decaying rules of impulsive environment in ship structure.Parameters in the prediction function are analyzed on the basis of numerical data of typical ships.Finally,a comparison between ship trial and results obtained by the method presented in this paper is made and detonates that the rationality and applicability of the present method.This engineering prediction method can supply a fairly satisfied reference for shock resistance design in the early phase of ship design.
引文
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[13]BV0430-85德国国防军舰建造规范-冲击安全性[S].1989.
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[2]KEIL,A.H.The response of ships to underwater explosions[J].Annual Meeting of The SNAME,New York,1961,69:366-410.
[3]吴用舒.水面舰船冲击环境的理论研究[R].船舶系统工程部,1982.
[4]钱安其,嵇春艳,王自力.水下爆炸荷载作用下水面舰船设备冲击环境预报方法研究[J].舰船科学技术,2006,28(4):43-47.
[5]姚熊亮,郭君,许维军.船舶结构远场爆炸冲击动响应的数值试验方法[J].中国造船,2006,47(2):24-34.
[6]姚熊亮,张阿漫,许维军.声固耦合方法在舰船水下爆炸中的应用[J].哈尔滨工程大学学报,2005,26(6):707-712.
[7]YAO X L,GUO J,FENG L H,ZHANG A M.Comparability research on impulsive response of double stiffened cylindrical shells subjected to underwater explosion[J].International Journal of Impact Engineering,2009,36(5):754-762.
[8]LIANG C.C.,TAI Y.S.Shock response of a surface ship subjected to noncontact underwater explosions[J].Ocean Engineering,2006,33:748-772.
[9]姚熊亮,郭君,曹宇,冯麟涵.在水下爆炸冲击波作用下的新型冲击因子[J].中国造船,2008,49(2):52-59.
[10]曹宇.水下爆炸冲击环境相似性研究[D].哈尔滨,哈尔滨工程大学,2007.
[11]姚熊亮等.XXX舰实船抗冲击试验测量报告[R].哈尔滨工程大学报告,2008.
[12]李小军,阎秀杰,潘华.中小震近场地震动估计中地震动衰减关系的适用性分析[J].地震工程与工程振动,2005,25(1):1-7.
[13]BV0430-85德国国防军舰建造规范-冲击安全性[S].1989.
[14]刘建湖.舰船非接触水下爆炸动力学的理论与应用[D].中国舰船科学研究中心,2002.
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