| 舰船弹性安装设备抗冲击设计的“谱跌”问题研究 |
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| 引用本文： | 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. DOI: 10.3404/j.issn.1672-7649.2009.07.010 |
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| 作者姓名： | 姜涛 王伟力 张玮 |
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| 作者单位： | 1. 海军航空工程学院,兵器科学系,山东,烟台,264001
2. 海军装备研究院,北京,100161 |
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| 摘 要： | 研究在应用冲击谱进行舰艇设备抗冲击性能设计时,由于基础的弹性引起的冲击谱设计谱值的变化规律.利用二自由度模型简化舰艇设备安装模型,通过对二自由度模型基础冲击谱的分析,得出在设备的自身固有频率处,基础的冲击谱存在峰值的突降.在设备自身固有频率和基础固有频率接近,或设备质量大于0.2倍基础质量时,必须考虑"谱跌"因素的影响.多自由度系统中具有相同的"谱跌"现象和规律.
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| 关 键 词： | 舰艇 抗冲击 反应谱 谱跌 |
Research of spectrum dip at marine equipment anti-shock with elastic foundation |
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| JIANG Tao,WANG Wei-li,ZHANG Wei. Research of spectrum dip at marine equipment anti-shock with elastic foundation[J]. Ship Science and Technology, 2009, 31(7): 56-59. DOI: 10.3404/j.issn.1672-7649.2009.07.010 |
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| Authors: | JIANG Tao WANG Wei-li ZHANG Wei |
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| Abstract: | Analyze the law that mutual affect of elastic foundation and equipment brought change of spectrum value. The installation of marine equipments is not rigid generally. It must been take into account when analyze ship equipment anti-shock by shock response spectrum. This paper simulated the model of marine equipment foundation by double free degree system and got that the shock response spectrum value of foundation decreased at the equipment natural frequency. This change has been named "spectrum dip". It must been regarded while equipment natural frequency is near to foundation natural frequency or equipment mass is more heavy than 0.2 times foundation mass. Multi-degree freedom system has the same phenomena and rule of "spectrum dip" like single degree freedom system. |
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| Keywords: | ship anti-shock shock response spectrum spectrum dip |
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