| 提高阻尼识别精度的ITD两步法 |
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| 引用本文： | 王建有,陈健云.提高阻尼识别精度的ITD两步法[J].世界地震工程,2003,19(3):35-38. |
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| 作者姓名： | 王建有 陈健云 |
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| 作者单位： | 大连理工大学,海岸和近海工程国家重点实验室,辽宁,大连,116023 |
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| 基金项目： | 国家自然科学基金资助项目(50209002)，辽宁省自然科学基金资助项目(20022130) |
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| 摘 要： | 由于无限介质中辐射阻尼的存在，地下结构抗震安全评价中正确地识别阻尼影响十分重要。阻尼从理论上指出了ITD时域识别技术在阻尼比识别方面存在误差的原因，并提出了一种改进的阻尼识别方法，算例表明，提出的方法，能显著地提高阻尼的识别精度。
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| 关 键 词： | 阻尼 地下结构 阻尼识别 ITD 抗震安全评价 识别精度 |
| 文章编号： | 1007-6069(2003)03-0035-04 |
| 修稿时间： | 2003年2月15日 |
A two- step ITD method for damping identification |
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| WANG Jian-you,CHEN Jian-yun.A two- step ITD method for damping identification[J].World Information On Earthquake Engineering,2003,19(3):35-38. |
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| Authors: | WANG Jian-you CHEN Jian-yun |
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| Abstract: | The radiation damping has important effect on the seismic response of underground structures because of the interaction between structures and infinite medium, and the energy dissipation mechanism of structure and its components become complicated. The study on damping identification is an important problem for seismic safety evaluation of underground structures.The defect of ITD time domain technique in damping identification is discussed theoretically, and a new two-step ITD method is proposed. Numerical example indicates that the proposed method can significantly improve the identified damping accuracy. |
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| Keywords: | underground structure damping identification ITD |
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