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| 结构水下爆炸响应的恢复与冲击谱计算 | |
| 引用本文： | 杨咏,樊江玲,张志谊. 结构水下爆炸响应的恢复与冲击谱计算[J]. 机电设备, 2007, 24(8): 44-46 |
| 作者姓名： | 杨咏 樊江玲 张志谊 |
| 作者单位： | 中国船舶重工集团公司,第704研究所,上海,200031;上海交通大学振动冲击噪声研究所,上海,200240 |
| 摘 要： | 由于传感器受高强度冲击作用,实测的结构水下爆炸响应信号可能偏离正常特征,为进一步分析响应信号带来困难.文中针对实测加速度信号的噪声特征,对信号采用SVD及ARMA滤波处理,先恢复真实的响应信号,然后在此基础上,给出正确的冲击谱计算结果.计算结果说明了SVD结合无相差滤波能够准确分离具有阶跃特征的低频噪声信号,对低频段的冲击响应谱计算精度有利. |
| 关 键 词： | 水下爆炸 数字滤波 冲击谱 计算 |
| 文章编号： | 1005-8354（2007）08-0044-03 |
| 修稿时间： | 2007-08-16 |
Signal recovery of structural responses to undex and shock spectrum computation |
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| YANG Yong,FAN Jiang-ling,ZHANG Zhi-yi. Signal recovery of structural responses to undex and shock spectrum computation[J]. Mechanical and Electrical Equipment, 2007, 24(8): 44-46 | |
| Authors: | YANG Yong FAN Jiang-ling ZHANG Zhi-yi |
| Affiliation: | 1. No. 704 Research Institute, CSIC, Shanghai 200031, China; 2. Institute of Vibration, Shock and Noise, Shanghai Jiao tong University, Shanghai 200240, China |
| Abstract: | The measured responses of a structure subjected to UNDEX(underwater explosion) may deviate from the exact results due to high intensity impact on transducers,which will further cause fault shock spectrum(shock response spectrum) analysis if this kind of disturbance is not filtered.In view of the disturbance characteristics,SVD(singular value decomposition) and ARMA filtering techniques are first combined to restore the exact response signals,and then shock spectrum is computed.The results show that SVD in combination with ARMA filtering is able to separate step-like disturbances from measured response signals and as a result improves the accuracy of shock spectrum at low frequencies. |
| Keywords: | underwater explosion digital filtering shock spectrum computation |
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