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Experimental investigation on the vortex-induced vibration of a rectangular 4:1 cylinder under skew winds
https://orcid.org/0000-0001-6872-7482
Abstract The characteristics of vortex-induced vibration (VIV) of a rectangular 4:1 cylinder are comprehensively investigated under different wind yaw angles (β = 0°, 5°, 10°, 15°, 20°, 25°, and 30°) and wind angles of attack (α m = +5°, +3°, and 0°) using wind tunnel tests. For the VIVs of a rectangular 4:1 cylinder, the lock-in regions, amplitudes, frequencies, hysteresis effects, and the applicabilities of independence principle (IP) for various cases are analyzed. Experimental results suggest that the maximum VIV amplitude and the onset wind speed for VIV respectively decreases and increases with increasing β. Hence, it is reasonable to assume that the most unfavorable state of VIV occurs for β = 0° for the rectangular 4:1 cylinder. However, the IP theory is inapplicable for predicting its VIV responses under skew winds. The maximum amplitude increases with the increase of α m, while the lock-in region shrinks with α m. For the rectangular 4:1 cylinder under skew winds, the experimental VIV response may provide a benchmark for checking the prediction accuracies of mathematical models and computational fluid dynamic simulations.
Highlights Wind tunnel test is conducted for a 4:1 rectangular cylinder under skew winds. A new spring-suspended sectional model system is proposed for skew wind test. The applicability of independence principle (IP) is systematically analyzed. The experimental study may provide a benchmark for future numerical studies.
Experimental investigation on the vortex-induced vibration of a rectangular 4:1 cylinder under skew winds
https://orcid.org/0000-0001-6872-7482
Abstract The characteristics of vortex-induced vibration (VIV) of a rectangular 4:1 cylinder are comprehensively investigated under different wind yaw angles (β = 0°, 5°, 10°, 15°, 20°, 25°, and 30°) and wind angles of attack (α m = +5°, +3°, and 0°) using wind tunnel tests. For the VIVs of a rectangular 4:1 cylinder, the lock-in regions, amplitudes, frequencies, hysteresis effects, and the applicabilities of independence principle (IP) for various cases are analyzed. Experimental results suggest that the maximum VIV amplitude and the onset wind speed for VIV respectively decreases and increases with increasing β. Hence, it is reasonable to assume that the most unfavorable state of VIV occurs for β = 0° for the rectangular 4:1 cylinder. However, the IP theory is inapplicable for predicting its VIV responses under skew winds. The maximum amplitude increases with the increase of α m, while the lock-in region shrinks with α m. For the rectangular 4:1 cylinder under skew winds, the experimental VIV response may provide a benchmark for checking the prediction accuracies of mathematical models and computational fluid dynamic simulations.
Highlights Wind tunnel test is conducted for a 4:1 rectangular cylinder under skew winds. A new spring-suspended sectional model system is proposed for skew wind test. The applicability of independence principle (IP) is systematically analyzed. The experimental study may provide a benchmark for future numerical studies.
Experimental investigation on the vortex-induced vibration of a rectangular 4:1 cylinder under skew winds
https://orcid.org/0000-0001-6872-7482
Abstract The characteristics of vortex-induced vibration (VIV) of a rectangular 4:1 cylinder are comprehensively investigated under different wind yaw angles (β = 0°, 5°, 10°, 15°, 20°, 25°, and 30°) and wind angles of attack (α m = +5°, +3°, and 0°) using wind tunnel tests. For the VIVs of a rectangular 4:1 cylinder, the lock-in regions, amplitudes, frequencies, hysteresis effects, and the applicabilities of independence principle (IP) for various cases are analyzed. Experimental results suggest that the maximum VIV amplitude and the onset wind speed for VIV respectively decreases and increases with increasing β. Hence, it is reasonable to assume that the most unfavorable state of VIV occurs for β = 0° for the rectangular 4:1 cylinder. However, the IP theory is inapplicable for predicting its VIV responses under skew winds. The maximum amplitude increases with the increase of α m, while the lock-in region shrinks with α m. For the rectangular 4:1 cylinder under skew winds, the experimental VIV response may provide a benchmark for checking the prediction accuracies of mathematical models and computational fluid dynamic simulations.
Highlights Wind tunnel test is conducted for a 4:1 rectangular cylinder under skew winds. A new spring-suspended sectional model system is proposed for skew wind test. The applicability of independence principle (IP) is systematically analyzed. The experimental study may provide a benchmark for future numerical studies.
Experimental investigation on the vortex-induced vibration of a rectangular 4:1 cylinder under skew winds
Wang, Bo (author) / Zhang, Mingjie (author) / Xu, Fuyou (author)
2022-07-27
Article (Journal)
Electronic Resource
English
Vortex induced vibration of circular cylinder
| Online Contents | 1993
Vortex induced vibration of circular cylinder
| Elsevier | 1993
Buffeting Response to Skew Winds
| Wiley | 2013