【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。更多还原

【Abstract】 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.更多还原