Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method
The output-only modal analysis for bridge structures based on improved empirical mode decomposition (EMD) is investigated in this study. First, a bandwidth restricted EMD is proposed for decomposing nonstationary output measurements with close frequency components. The advantage of bandwidth restric...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/945862 |
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| _version_ | 1832556328656044032 |
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| author | Shiqiang Qin Qiuping Wang Juntao Kang |
| author_facet | Shiqiang Qin Qiuping Wang Juntao Kang |
| author_sort | Shiqiang Qin |
| collection | DOAJ |
| description | The output-only modal analysis for bridge structures based on improved empirical mode decomposition (EMD) is investigated in this study. First, a bandwidth restricted EMD is proposed for decomposing nonstationary output measurements with close frequency components. The advantage of bandwidth restricted EMD to standard EMD is illustrated by a numerical simulation. Next, the modal parameters are extracted from intrinsic mode function obtained from the improved EMD by both random decrement technique and stochastic subspace identification. Finally, output-only modal analysis of a railway bridge is presented. The study demonstrates the mode mixing issues of standard EMD can be restrained by introducing bandwidth restricted signal. Further, with the improved EMD method, band-pass filter is no longer needed for separating the closely spaced frequency components. The modal parameters extracted based on the improved EMD method show good agreement with those extracted by conventional modal identification algorithms. |
| format | Article |
| id | doaj-art-42bc7df375944f44ab40bd8e507303ab |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-42bc7df375944f44ab40bd8e507303ab2025-02-03T05:45:42ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422015-01-01201510.1155/2015/945862945862Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition MethodShiqiang Qin0Qiuping Wang1Juntao Kang2School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, ChinaSchool of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, ChinaSchool of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, ChinaThe output-only modal analysis for bridge structures based on improved empirical mode decomposition (EMD) is investigated in this study. First, a bandwidth restricted EMD is proposed for decomposing nonstationary output measurements with close frequency components. The advantage of bandwidth restricted EMD to standard EMD is illustrated by a numerical simulation. Next, the modal parameters are extracted from intrinsic mode function obtained from the improved EMD by both random decrement technique and stochastic subspace identification. Finally, output-only modal analysis of a railway bridge is presented. The study demonstrates the mode mixing issues of standard EMD can be restrained by introducing bandwidth restricted signal. Further, with the improved EMD method, band-pass filter is no longer needed for separating the closely spaced frequency components. The modal parameters extracted based on the improved EMD method show good agreement with those extracted by conventional modal identification algorithms.http://dx.doi.org/10.1155/2015/945862 |
| spellingShingle | Shiqiang Qin Qiuping Wang Juntao Kang Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method Advances in Materials Science and Engineering |
| title | Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method |
| title_full | Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method |
| title_fullStr | Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method |
| title_full_unstemmed | Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method |
| title_short | Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method |
| title_sort | output only modal analysis based on improved empirical mode decomposition method |
| url | http://dx.doi.org/10.1155/2015/945862 |
| work_keys_str_mv | AT shiqiangqin outputonlymodalanalysisbasedonimprovedempiricalmodedecompositionmethod AT qiupingwang outputonlymodalanalysisbasedonimprovedempiricalmodedecompositionmethod AT juntaokang outputonlymodalanalysisbasedonimprovedempiricalmodedecompositionmethod |