水下爆炸不同冲击环境下的舰载设备响应分析

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摘要为了研究不同冲击环境下的舰载设备的响应及激励力频率对设备响应的影响，对不同类型和重量设备的响应进行了数值仿真和理论分析。将舰载设备在冲击载荷作用下的受力模型简化为基础激励的多自由度系统，利用虚拟约束边界模态方法建立了不同冲击环境下多自由度系统响应的计算方法，通过系统的频响函数分析激励力频率对设备响应的影响。结果表明：冲击谱参数中谱位移和谱速度对设备响应影响较大，而谱加速度大幅变化对设备响应基本无影响；当激励力频率大于舰载设备中各主要子结构中最高的低阶自由界面模态截断频率的两倍时，可忽略激励力对设备响应的影响。分析结果可对舰载设备在冲击载荷作用下的响应分析及抗冲击评估提供参考。

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	王军1
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	郭君1
	杨棣1
	姚熊亮1

关键词 ：水下爆炸, 冲击环境, 舰载设备, 虚拟约束边界, 响应分析

Abstract：In order to study the response of shipboard equipment under different shock environment and the impact of exciting frequency on equipment, the response of different types and weights of equipment were analyzed by numerical simulation and theoretical analysis. The force model of shipboard equipment under impact load was simplified as the multi-degree of freedom system with base excitation. Through the modal method of virtual constraint boundary, a calculation method for the response of multi-degree of freedom system under different shock environment was established. The impact of exciting frequency on equipment response was studied by analyzing the frequency response function of the system. The results show that spectrum displacement and spectrum velocity have significant effect on equipment response, but the significant changes in spectrum acceleration has little influence on the equipment response. The impact of exciting force on equipment response is negligible when the exciting frequency is greater than twice the frequency of modal truncation. The results can provide references for response analysis of shipboard equipment under impact load and the impact resistant ability evaluation of equipment.

Key words： underwater explosion shock environment shipboard equipment virtual constraint boundary response analysis

收稿日期: 2013-11-29 出版日期: 2015-08-15

引用本文:

王军1，2,郭君1，杨棣1，姚熊亮1. 水下爆炸不同冲击环境下的舰载设备响应分析[J]. 振动与冲击, 2015, 34(15): 181-187.
WANG Jun1, 2,GUO Jun1, YANG Di1, YAO Xiong-liang1. Response analysis of shipboard equipment under different underwater explosion environment. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(15): 181-187.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I15/181

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