Research on wind-induced vibration response of ropeway system based on field measurement and numerical simulation

Wind load is the main load affecting the ropeway safety, making it imperative to comprehend the wind-induced vibration characteristics of the entire system for its secure operation. This study focuses on the Songhua River passenger ropeway, where an integrated approach of field measurements and numerical simulations was employed to study the wind induced vibration of the ropeway system. Results show that the periodic rolling and yawing are the predominant attitudes of the cable car during motion. And the longitudinal acceleration is greater than the lateral acceleration. In the same wind direction, the relationship between the displacement of the ropeway tower top and the mean wind speed can be expressed as a quadratic function. During cable car operation, the lateral displacement of the tower top increases by over 40%, while the longitudinal displacement increased by 1.4 to 3.45 times. The lateral swing of the cables gave the tower a load spectrum with its own self oscillation dominant frequency. Compared with the single tower, the vibration frequency of the ropeway tower in the direction of the cable increases by 44.53% in the tower-cable system of the Songhua River ropeway. Based on the cable car operation load calculation model, the most unfavorable calculation result of the Songhua River ropeway tower displacement is 1.05~1.34 times the measured values.