基于谱跌现象的舰船设计谱影响因素分析  

Analysis of warship design spectrum influencing factors based on the spectrum drop phenomenon

作　　者：谢浩 郭君[2] 王强龙 杨旭 XIE Hao;GUO Jun;WANG Qianglong;YANG Xu(Wuhan Second Ship Design and Research Institute,Wuhan 430064,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]武汉第二船舶设计研究所,湖北武汉430064 [2]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2020年第2期12-16,共5页Applied Science and Technology

摘　　要：目前舰船设备的设计谱谱值主要参照国外的军用标准,由于缺乏对标准制定原理的足够认识,导致设备的设计谱值未能与我国现阶段的抗冲击要求一致。针对现行的设计谱方法,首先通过多自由度系统的理论计算,并结合机械阻抗法介绍了设计谱中的谱跌现象;然后将简化设备安装于实际的舰船结构上,运用声固耦合法计算其水下爆炸下的冲击环境。通过实验得到在其他参数不变的情况下,设备的设计谱速度与质量、安装频率成反相关性,与理论推导规律一致,设计谱的确定必须充分考虑设备安装位置与设备自身特性的影响。At present,the design spectrum value of equipment is mainly derived from foreign military standards,due to the lack of sufficient understanding of the principle of standard setting,which results in that the design spectrum value of equipment can not meet the requirements of shock resistance in our country at the present stage.In view of the current design spectrum method,by combination with the theoretical calculation of multi-degree-of-freedom system,the spectrum dip phenomenon in the design spectrum based on the mechanical impedance method is introduced in this paper.Then,the simplified equipment is installed on the actual ship structure,and the acoustic-solid coupling method is used to calculate the shock environment under the underwater explosion impact.When other parameters are unchanged,the design spectral velocity of the equipment is inversely correlated with the mass and installation frequency,which is consistent with the law of theoretical deduction.Therefore,the influence of the installation location of the equipment and the characteristics of the equipment itself must be fully considered in the determination of the design spectrum.

关 键 词：设计谱 机械阻抗法 谱跌 声固耦合法 冲击环境 谱速度 谱加速度 谱位移 

分 类 号：TB535.1[理学—物理]