谱估计方法在大型实验装置地基振动测量中的应用
大型物理实验装置为获得高品质的强流脉冲电子束流，通常对地基振动部有较高的要求。详尽的地质振动状况分析是装置选址的重要前提。本文针对某装置待勘区域实际地质条件和周围人文环境，首先简要介绍了测点布设、振动测试系统的基本组成，然后通过分阶段测试比对试验对某装置待勘区域进行实际振动测量，最后应用谱分析的方法对区域内不同时间段、不同方向的测量数据进行分析，评估选址位置是否合理。数据结果表明，待勘区域在5μm·s-1。以上速度被95％概率检测，垂直方向位移振幅谱在185nm，水平方向大于垂直方向约60nm，物理实验表明，进一步基建过程中应采取适当的减震措施降低垂直位移幅度。...
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| Published in | 核技术 Vol. 39; no. 3; pp. 50 - 58 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
西北核技术研究所 西安 710024
2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-3219 |
| DOI | 10.11889/j.0253-3219.2016.hjs.39.030503 |
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| Summary: | 大型物理实验装置为获得高品质的强流脉冲电子束流，通常对地基振动部有较高的要求。详尽的地质振动状况分析是装置选址的重要前提。本文针对某装置待勘区域实际地质条件和周围人文环境，首先简要介绍了测点布设、振动测试系统的基本组成，然后通过分阶段测试比对试验对某装置待勘区域进行实际振动测量，最后应用谱分析的方法对区域内不同时间段、不同方向的测量数据进行分析，评估选址位置是否合理。数据结果表明，待勘区域在5μm·s-1。以上速度被95％概率检测，垂直方向位移振幅谱在185nm，水平方向大于垂直方向约60nm，物理实验表明，进一步基建过程中应采取适当的减震措施降低垂直位移幅度。 |
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| Bibliography: | 31-1342/TL Large physical experimental facilities, Ground vibration, Spectrum estimation, Displacement spectrum,Amplitude spectrum Background： In order to obtain high quality pulsed electron beam for large physical experimental facilities, it usually has higher requirement of the vibration of the foundation. Detailed geological vibration analysis is an important premise for the location of the experimental facilities. Purpose： Spectrum estimation method was applied to evaluate whether the location is reasonable through the actual vibration measurement for exploration area of different positions, different time-windows and different components. Methods： Firstly, the theories of traditional spectrum estimation were introduced. Then vibrations at different exploration positions, different time-windows, frequency bands and directions were analyzed according to the above methods, and amplitude spectrum and power spectrum of exploration area were given. Results ＆ Conclusion： The data show that amplitude spectrum disp |
| ISSN: | 0253-3219 |
| DOI: | 10.11889/j.0253-3219.2016.hjs.39.030503 |