Experimental Investigation on the Nonlinear Coupled Flutter Motion of a Typical Flat Closed-Box Bridge Deck
The nonlinear post-flutter instabilities were experimentally investigated through two-degree-of-freedom sectional model tests on a typical flat closed-box bridge deck (width-to-depth ratio 9.14). Laser displacement sensors and piezoelectric force balances were used in the synchronous measurement of...
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| Format: | Article |
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MDPI AG
2020-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/2/568 |
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| author | Guangzhong Gao Ledong Zhu Feng Wang Hua Bai Jianming Hao |
| author_facet | Guangzhong Gao Ledong Zhu Feng Wang Hua Bai Jianming Hao |
| author_sort | Guangzhong Gao |
| collection | DOAJ |
| description | The nonlinear post-flutter instabilities were experimentally investigated through two-degree-of-freedom sectional model tests on a typical flat closed-box bridge deck (width-to-depth ratio 9.14). Laser displacement sensors and piezoelectric force balances were used in the synchronous measurement of dynamic displacement and aerodynamic force. Beyond linear flutter boundary, the sectional model exhibited heave-torsion coupled limit cycle oscillation (LCOs) with an unrestricted increase of stable amplitudes with reduced velocity. The post-critical LCOs vibrated in a complex mode with amplitude-dependent mode modulus and phase angle. Obvious heaving static deformation was found to be coupled with the large-amplitude post-critical LCOs, for which classical quasi-steady theory was not applicable. The aerodynamic torsional moment and lift during post-critical LCOs were measured through a novel wind-tunnel technique by 4 piezoelectric force balances. The measured force signals were found to contain significantly higher-order components. The energy evolution mechanism during post-critical LCOs was revealed via the hysteresis loops of the measured force signals. |
| first_indexed | 2024-04-11T13:43:47Z |
| format | Article |
| id | doaj.art-1ecd2ff423b844d99ff774f6dd4b95a0 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:43:47Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-1ecd2ff423b844d99ff774f6dd4b95a02022-12-22T04:21:10ZengMDPI AGSensors1424-82202020-01-0120256810.3390/s20020568s20020568Experimental Investigation on the Nonlinear Coupled Flutter Motion of a Typical Flat Closed-Box Bridge DeckGuangzhong Gao0Ledong Zhu1Feng Wang2Hua Bai3Jianming Hao4Highway College, Chang’an University, Xi’an 710064, ChinaState Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, ChinaHighway College, Chang’an University, Xi’an 710064, ChinaHighway College, Chang’an University, Xi’an 710064, ChinaHighway College, Chang’an University, Xi’an 710064, ChinaThe nonlinear post-flutter instabilities were experimentally investigated through two-degree-of-freedom sectional model tests on a typical flat closed-box bridge deck (width-to-depth ratio 9.14). Laser displacement sensors and piezoelectric force balances were used in the synchronous measurement of dynamic displacement and aerodynamic force. Beyond linear flutter boundary, the sectional model exhibited heave-torsion coupled limit cycle oscillation (LCOs) with an unrestricted increase of stable amplitudes with reduced velocity. The post-critical LCOs vibrated in a complex mode with amplitude-dependent mode modulus and phase angle. Obvious heaving static deformation was found to be coupled with the large-amplitude post-critical LCOs, for which classical quasi-steady theory was not applicable. The aerodynamic torsional moment and lift during post-critical LCOs were measured through a novel wind-tunnel technique by 4 piezoelectric force balances. The measured force signals were found to contain significantly higher-order components. The energy evolution mechanism during post-critical LCOs was revealed via the hysteresis loops of the measured force signals.https://www.mdpi.com/1424-8220/20/2/568nonlinear aeroelasticitypost flutterlimit cycle oscillationclosed box bridge sectionwind tunnel |
| spellingShingle | Guangzhong Gao Ledong Zhu Feng Wang Hua Bai Jianming Hao Experimental Investigation on the Nonlinear Coupled Flutter Motion of a Typical Flat Closed-Box Bridge Deck Sensors nonlinear aeroelasticity post flutter limit cycle oscillation closed box bridge section wind tunnel |
| title | Experimental Investigation on the Nonlinear Coupled Flutter Motion of a Typical Flat Closed-Box Bridge Deck |
| title_full | Experimental Investigation on the Nonlinear Coupled Flutter Motion of a Typical Flat Closed-Box Bridge Deck |
| title_fullStr | Experimental Investigation on the Nonlinear Coupled Flutter Motion of a Typical Flat Closed-Box Bridge Deck |
| title_full_unstemmed | Experimental Investigation on the Nonlinear Coupled Flutter Motion of a Typical Flat Closed-Box Bridge Deck |
| title_short | Experimental Investigation on the Nonlinear Coupled Flutter Motion of a Typical Flat Closed-Box Bridge Deck |
| title_sort | experimental investigation on the nonlinear coupled flutter motion of a typical flat closed box bridge deck |
| topic | nonlinear aeroelasticity post flutter limit cycle oscillation closed box bridge section wind tunnel |
| url | https://www.mdpi.com/1424-8220/20/2/568 |
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