Research on Response Kurtosis Estimation in Linear Structures Subjected to Nonstationary Random Excitation: An Envelope-Based Method
The kurtosis of stress response significantly affects the fatigue failure time of structures under nonstationary excitation, making it a vital parameter for characterizing the study of fatigue damage caused by nonstationary vibrations. However, the existing methods have not yet considered the assess...
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| Format: | Article |
| Language: | English |
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Wiley
2024-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/vib/9998563 |
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| _version_ | 1841560575016960000 |
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| author | Song Cui Lei Hong Liguo Zang |
| author_facet | Song Cui Lei Hong Liguo Zang |
| author_sort | Song Cui |
| collection | DOAJ |
| description | The kurtosis of stress response significantly affects the fatigue failure time of structures under nonstationary excitation, making it a vital parameter for characterizing the study of fatigue damage caused by nonstationary vibrations. However, the existing methods have not yet considered the assessment of response kurtosis when the structural modal damping is low, which poses a hindrance to the advancement of vibration fatigue acceleration theories. This study focuses on analyzing the envelope characteristics of the response of linear structures under nonstationary excitation produced by the amplitude modulation method. A novel approach is proposed to assess kurtosis by leveraging the envelope curve of the nonstationary signal response. The simulation results demonstrate that the frequency resolution of signal sampling also impacts the response’s kurtosis. The proposed method offers an accurate evaluation and rapid control of response kurtosis in both numerical and experimental examples. |
| format | Article |
| id | doaj-art-a82a51027f624bfd9848199240633052 |
| institution | Kabale University |
| issn | 1875-9203 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-a82a51027f624bfd98481992406330522025-01-04T00:00:08ZengWileyShock and Vibration1875-92032024-01-01202410.1155/vib/9998563Research on Response Kurtosis Estimation in Linear Structures Subjected to Nonstationary Random Excitation: An Envelope-Based MethodSong Cui0Lei Hong1Liguo Zang2The Faculty of Railway VehiclesThe Faculty of Railway VehiclesThe Faculty of Railway VehiclesThe kurtosis of stress response significantly affects the fatigue failure time of structures under nonstationary excitation, making it a vital parameter for characterizing the study of fatigue damage caused by nonstationary vibrations. However, the existing methods have not yet considered the assessment of response kurtosis when the structural modal damping is low, which poses a hindrance to the advancement of vibration fatigue acceleration theories. This study focuses on analyzing the envelope characteristics of the response of linear structures under nonstationary excitation produced by the amplitude modulation method. A novel approach is proposed to assess kurtosis by leveraging the envelope curve of the nonstationary signal response. The simulation results demonstrate that the frequency resolution of signal sampling also impacts the response’s kurtosis. The proposed method offers an accurate evaluation and rapid control of response kurtosis in both numerical and experimental examples.http://dx.doi.org/10.1155/vib/9998563 |
| spellingShingle | Song Cui Lei Hong Liguo Zang Research on Response Kurtosis Estimation in Linear Structures Subjected to Nonstationary Random Excitation: An Envelope-Based Method Shock and Vibration |
| title | Research on Response Kurtosis Estimation in Linear Structures Subjected to Nonstationary Random Excitation: An Envelope-Based Method |
| title_full | Research on Response Kurtosis Estimation in Linear Structures Subjected to Nonstationary Random Excitation: An Envelope-Based Method |
| title_fullStr | Research on Response Kurtosis Estimation in Linear Structures Subjected to Nonstationary Random Excitation: An Envelope-Based Method |
| title_full_unstemmed | Research on Response Kurtosis Estimation in Linear Structures Subjected to Nonstationary Random Excitation: An Envelope-Based Method |
| title_short | Research on Response Kurtosis Estimation in Linear Structures Subjected to Nonstationary Random Excitation: An Envelope-Based Method |
| title_sort | research on response kurtosis estimation in linear structures subjected to nonstationary random excitation an envelope based method |
| url | http://dx.doi.org/10.1155/vib/9998563 |
| work_keys_str_mv | AT songcui researchonresponsekurtosisestimationinlinearstructuressubjectedtononstationaryrandomexcitationanenvelopebasedmethod AT leihong researchonresponsekurtosisestimationinlinearstructuressubjectedtononstationaryrandomexcitationanenvelopebasedmethod AT liguozang researchonresponsekurtosisestimationinlinearstructuressubjectedtononstationaryrandomexcitationanenvelopebasedmethod |