Abstract

The wind-induced damages on quayside container cranes happen occasionally in recent years, which is mostly sliding and overturning caused by transient gusty wind (particularly the “short-rise-time gust”). Therefore, studies on the stochastic dynamic transient gusty wind effect on the sliding and overturning of quayside container cranes are required. Based on aerodynamic data obtained from wind tunnel tests, dynamic transient gusty wind-induced sliding force and overturning moment responses of quayside container cranes were analyzed in the present study. Through Monte Carlo simulation based on quasi-stationary assumption, the stochastic characteristics (including statistics and probabilistic distributions) of the peak dynamic wind-induced responses of transient gusty wind and corresponding stationary gust wind were analyzed. The influences of different transient gusty wind parameters (accelerations, wind velocity change ratios) on the dynamic impact effects were discussed. As a result, the critical “start-up” acceleration was formulated. The transient gusty wind amplification factors on the dynamic responses were quantified. And the peak dynamic transient gusty wind-induced responses with a certain non-exceedance probability can be determined.

摘要

岸边集装箱起重机风害近年来时有发生，多为瞬态阵风（特别是“短升阵风”）造成的滑动和倾覆。因此，需要研究随机动态瞬态阵风对岸边集装箱起重机滑动和倾覆的影响。基于风洞试验获得的空气动力学数据，本研究分析了岸边集装箱起重机的动态瞬态阵风风致滑动力和倾覆力矩响应。通过基于准平稳假设的蒙特卡罗模拟，分析了瞬态阵风和对应的静止阵风的峰值动态风致响应的随机特征（包括统计量和概率分布）。讨论了不同瞬态阵风参数（加速度、风速变化比）对动力冲击效果的影响。结果，制定了关键的“启动”加速度。对动态响应的瞬态阵风放大因子进行了量化。并且可以确定具有一定非超越概率的峰值动态瞬态阵风风致响应。