弹性隔离安装设备抗冲击设计指标影响因素分析
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摘要
[目的]舰船弹性隔离系统设备系统的抗冲击标准均是针对隔离系统整体,没有给出设备本体抗冲击设计指标分解方法,限制了装备系统抗冲击论证和研制。[方法]为解决该矛盾,采用有限元分析方法,对弹性安装设备系统冲击环境的主要影响因素进行计算和分析,包括设备重量、重心位置、面积尺寸等,构建集中质量系统来模拟隔离安装的设备本体冲击环境计算模型,并对某双层隔离设备抗冲击指标进行分析计算,给出设备本体的冲击环境。[结果]结果显示,设备重量的影响最显著,并且在基础阻抗更小的甲板区域上,重量的影响效果更明显;重心位置和基座面积尺寸对冲击环境的影响可忽略。[结论]利用提出的分析模型,可实现对标准输入冲击谱的分解,得到弹性隔离安装设备抗冲击设计指标,从而指导后续设备本体抗冲击设计。
[Objectives] The shock resistance standards of the ships elastic isolation and installations system are all aimed at the isolation system as a whole, and there is no decomposition method of the shock resistance design indexes for the installations, which limits the shock resistance demonstration and development of the installations. [Methods] In this paper, the main factors of the shock environment of the elastic isolation installations are calculated and analyzed by using Finite Element Analysis(FEA)method, including the weight, the position of gravity center, the area of shock isolator, etc. Then the calculation model for the shock environment of the elastic isolation installations is simulated by the established centralized mass model. Based on this centralized mass model, the shock resistance indexes of a double-layer isolation installation are analyzed and calculated, and the shock environment of this installation is given. [Results] The results show that, the weight factor has the most significant influence on the shock environment, especially on the deck area where the base impedance is smaller; the influence of the position of gravity center and the area of shock isolator on the shock environment is negligible.[Conclusions] The standard input environment spectrum can be decomposed to obtain the shock resistance indexes of the elastic isolation installations by the calculation model, and these indexes can provide reference for the subsequent shock resistance design of the installations.
[Objectives] The shock resistance standards of the ships elastic isolation and installations system are all aimed at the isolation system as a whole, and there is no decomposition method of the shock resistance design indexes for the installations, which limits the shock resistance demonstration and development of the installations. [Methods] In this paper, the main factors of the shock environment of the elastic isolation installations are calculated and analyzed by using Finite Element Analysis(FEA)method, including the weight, the position of gravity center, the area of shock isolator, etc. Then the calculation model for the shock environment of the elastic isolation installations is simulated by the established centralized mass model. Based on this centralized mass model, the shock resistance indexes of a double-layer isolation installation are analyzed and calculated, and the shock environment of this installation is given. [Results] The results show that, the weight factor has the most significant influence on the shock environment, especially on the deck area where the base impedance is smaller; the influence of the position of gravity center and the area of shock isolator on the shock environment is negligible.[Conclusions] The standard input environment spectrum can be decomposed to obtain the shock resistance indexes of the elastic isolation installations by the calculation model, and these indexes can provide reference for the subsequent shock resistance design of the installations.
引文
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[7]姜涛,王伟力,张玮.舰船弹性安装设备抗冲击设计的“谱跌”问题研究[J].舰船科学技术,2009,31(7):56-59.Jiang T,Wang W L,Zhang W.Research of spectrum dip at marine equipment anti-shock with elastic foundation[J].Ship Science and Technology,2009,31(7):56-59(in Chinese).
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[2]联邦德国国防装备部技术和采购局.舰艇建造规范--冲击安全性:BV0430/85[S].科布伦茨:联邦德国国防装备部技术和采购局,1985.FRG Ministry of Defense Equipment Technology and Procurement.Code for ship construction-imact safety:BV0430/85[S].Koblenz:FRG Ministry of Defense Equipment Technology and Procurement,1985(in Chinese).
[3]国防科学技术委员会.舰船环境条件要求--机械环境:GJB1060.1-91[S].北京:国防科学技术委员会,1991.National Defense Science and Technology Commission.Ship enviromental conditions requirements-mechnical enviroment:GJB1060.1-91[S].Beijing:National Defense Science and Technology Commission,1991(in Chinese).
[4]中国人民解放军海军.舰船冲击响应谱:HJB715-2016[S].北京:中国人民解放军海军,2017.People's Liberation Army Navy.Ship impact response spectrum:HJB715-2016[S].Beijing:People's Liberation Army Navy,2017(in Chinese).
[5]王军.浮动冲击平台冲击动力特性研究[D].哈尔滨:哈尔滨工程大学,2012.Wang J.Research on the impact dynamic characteristics of the floating shock platform[D].Harbin:Harbin Engineering University,2012(in Chinese).
[6]贺少华,吴新跃.考虑谱跌的舰载设备冲击响应谱分析法[J].船舶力学,2010,14(11):1312-1318.He S H,Wu X Y.A spectrum method for shock response evaluation of shipboard machinery considering spectrum dip effect[J].Journal of Ship Mechanics.2010,14(11):1312-1318(in Chinese).
[7]姜涛,王伟力,张玮.舰船弹性安装设备抗冲击设计的“谱跌”问题研究[J].舰船科学技术,2009,31(7):56-59.Jiang T,Wang W L,Zhang W.Research of spectrum dip at marine equipment anti-shock with elastic foundation[J].Ship Science and Technology,2009,31(7):56-59(in Chinese).
[8]金咸定,夏利娟.船体振动学[M].上海:上海交通大学出版社,2011.Jin X D,Xia L J.Hull vibration[M].Shanghai:Shanghai Jiao Tong University Press,2011(in Chinese).