甲板模拟器对浮动冲击平台冲击环境的调节数值分析

Numerical investigation on the adjusting of deck simulator to impact environment of FSP

[目的]为研究安装了甲板模拟器的浮动冲击平台(FSP)系统对舰载设备考核的机理,[方法]建立平台甲板模拟器设备系统有限元模型和力学模型,并开展数值模拟分析。通过改变甲板模拟器的固有属性,提出以不同的甲板模拟器调节设备考核中的冲击输入,以满足设备冲击试验的要求。[结果]结果表明:当未安装设备时,甲板模拟器上的冲击谱曲线在自身固有频率处出现峰值;而安装设备时,不同的甲板模拟器可实现对冲击谱峰值的控制。[结论]因此,甲板模拟器与设备的相互作用改变了设备安装频率附近范围的冲击谱峰值,可以实现对设备冲击输入的调频作用。

[Objectives]In order to study the mechanism of shipborne equipment assessment in Floating Shock Platform (FSP) system equipped with deck simulator,[Methods] the platform-deck simulator-equipment system finite element model and mechanical model are established, and the numerical simulation analysis is carried out. By changing the inherent properties of the deck simulator,it is proposed that different deck simulators are used to regulate the shock input of the equipment assessment to meet the shock test requirements of equipment.[Results]The numerical results show that,when the equipment is not installed,the shock spectrum curve of the deck simulator has a peak value at its natural frequency;when the equipment is installed,the peak value of the shock spectrum can be controlled by different deck simulators.[Conclusions]Therefore,the interaction between the equipment and the deck simulator changes the peak value of the shock spectrum near the installation frequency of the equipment, to regulate the frequency in shock input of the equipment.