A numerical and experimental hybrid approach for the investigation of aerodynamic forces on stay cables suffering from rain-wind induced vibration

Modeling and analysis of the in-plane vibration of a complex cable-stayed bridge

“…It is observed that mode localization occurs on the cables when there are very close natural frequencies, which can be seen in Subcases 1 through 3 of Case 1 and Cases 2 and 3, where the bridge model is symmetrical and/or partially symmetrical, but the converse may not be true (mode localization occurs for modes 10, 11, and 17 in Subcase 1 of Case 1; modes 12, 13, 16, 21, 22, and 26 in Subcase 2 of Case 1; modes 12, 13, 21, 22, 24, and 26 in Subcase 3 of Case 1; modes 8, 9, 17, 19, 22, 24, and 29 in Case 2; and modes 10, 12, 13, 21, 22, and 24 in Case 3, but the natural frequencies are not very close). There are close, but not necessarily very close, natural frequencies when mode localization occurs on the cables in Subcases 1 through 3 of Case 1 and Cases 2 and 3, but the converse may not be true (there are close natural frequencies for modes 16,18,19 The difference between the curve veering phenomenon here and that in some other references [27,35,36] is that there can be more than two natural frequency loci approaching each other and they can stay close to each other for a relatively large range of parameter variation before they veer away, due to partial symmetry of the bridge model because d c 1 ¼ d c 2 . The mode shapes can be interchanged when curve veering occurs.…”

Influence of Dynamic Properties and Position of Rivulet on Rain–Wind-Induced Vibration of Stay Cables

“…Figs. 3(a-c) present the water rivulets distribution on the surface measured by the UTTMS at wind speeds of 6:76, 7:72, and 8:69 m=s, respectively (Li et al 2010b). As the wind speed continuously increases to 8:69 m=s, no RWIV is observed, yet the upper rivulet still remains; however, the steady circumferential oscillation of the upper rivulet gradually disappears as shown in Fig.…”

“…According to a previous study (Gu and Du 2005), a rainfall intensity of 30 mm/h with an inclination angle of 30°for two test cases (yaw angles of 20 and 22.5°for the first and second tests, respectively) is used. Li et al (2010b) studied the time history and frequency response of cable cross-flow displacement. The displacement amplitudes of the cable versus the wind velocity are shown in Fig.…”

Investigation and Control of VIVs with Multi-Lock-in Regions on Wide Flat Box Girders

“…As the motion dynamic of the numerical model is exactly the same as testing results, which give rise to an elimination to the coupling errors, this hybrid-CFD method is more accurate than traditional CFD simulations [16,18] and hence is of essential importance in revealing the mechanisms of VIV which have been recorded.…”