提出了等效风速比概念及相应假设条件,并将其应用于超越概率阈值评价方法.针对某一工程实例的风环境模拟分析表明各个评价标准间存在差异.基于威布尔分布理论,推导了超越概率阈值评价方法的各标准统一描述方法,并利用其研究了各个标准...提出了等效风速比概念及相应假设条件,并将其应用于超越概率阈值评价方法.针对某一工程实例的风环境模拟分析表明各个评价标准间存在差异.基于威布尔分布理论,推导了超越概率阈值评价方法的各标准统一描述方法,并利用其研究了各个标准之间的相对宽严程度.结果表明:对于各种人类活动,UWO标准最为宽松;对于行走,Force Technology标准最为严格;对于短时间或长时间坐立,Isyumor and Davenport标准最为严格.展开更多
The generation and propagation mechanism of strong nonlinear waves in the South China Sea is an essential research area. In this study, the third-generation wave model WAVEWATCH Ⅲ is employed to simulate wave fields ...The generation and propagation mechanism of strong nonlinear waves in the South China Sea is an essential research area. In this study, the third-generation wave model WAVEWATCH Ⅲ is employed to simulate wave fields under extreme sea states. The model, integrating the ST6 source term, is validated against observed data, demonstrating its credibility. The spatial distribution of the occurrence probability of strong nonlinear waves during typhoons is shown, and the waves in the straits and the northeastern part of the South China Sea show strong nonlinear characteristics. The high-order spectral model HOS-ocean is employed to simulate the random wave surface series beneath five different platform areas. The waves during the typhoon exhibit strong nonlinear characteristics, and freak waves exist. The space-varying probability model is established to describe the short-term probability distribution of nonlinear wave series. The exceedance probability distributions of the wave surface beneath different platform areas are compared and analyzed. The results show that with an increase in the platform area, the probability of a strong nonlinear wave beneath the platform increases.展开更多
文摘提出了等效风速比概念及相应假设条件,并将其应用于超越概率阈值评价方法.针对某一工程实例的风环境模拟分析表明各个评价标准间存在差异.基于威布尔分布理论,推导了超越概率阈值评价方法的各标准统一描述方法,并利用其研究了各个标准之间的相对宽严程度.结果表明:对于各种人类活动,UWO标准最为宽松;对于行走,Force Technology标准最为严格;对于短时间或长时间坐立,Isyumor and Davenport标准最为严格.
基金financially supported by the National Key R&D Program of China(No.2022YFC3104205)the National Natural Science Foundation of China(No.42377457).
文摘The generation and propagation mechanism of strong nonlinear waves in the South China Sea is an essential research area. In this study, the third-generation wave model WAVEWATCH Ⅲ is employed to simulate wave fields under extreme sea states. The model, integrating the ST6 source term, is validated against observed data, demonstrating its credibility. The spatial distribution of the occurrence probability of strong nonlinear waves during typhoons is shown, and the waves in the straits and the northeastern part of the South China Sea show strong nonlinear characteristics. The high-order spectral model HOS-ocean is employed to simulate the random wave surface series beneath five different platform areas. The waves during the typhoon exhibit strong nonlinear characteristics, and freak waves exist. The space-varying probability model is established to describe the short-term probability distribution of nonlinear wave series. The exceedance probability distributions of the wave surface beneath different platform areas are compared and analyzed. The results show that with an increase in the platform area, the probability of a strong nonlinear wave beneath the platform increases.
