摘要
文章对核电站取水口区域拦网绳索在海生物堵塞情境下的海流载荷进行了深入分析,据此识别出拦网断裂的高风险区域。(1)基于船载ADCP对布置拦网海域进行大潮期海流流速观测,依据卡门-普朗特模型与多项式方法对海流分层数据进行剖面流速插值;(2)使用插值最优解对拦网ANSYS有限元模型进行不同堵塞工况下的有限元计算。结果显示:在涨急、落急时段三次多项式拟合较卡门-普朗特模型更适合观测海域;拦网堵塞发生在高程7 m以下时,拦网极值受力水平较低,为绳索安全区;堵塞高程大于7 m时,随着高程增大,拦网绳索极值受力表现出明显的线性增大趋势。高程7 m以上区域为绳索崩断事故发生的高风险区域,且随着高程增加,断裂风险概率逐渐增大。
This study analyzes the structural stress characteristics of a debris filter net under various marine biological blockage conditions.Firstly,the velocity of currents near water intake is measured based on shipborne ADCP,using the Karman-Prandtl model and polynomial interpolation methods were employed to reconstruct the vertical velocity profiles from stratified observation data.Subsequently,t a finite element(FE)model of the filter net was developed,and its mechanical response was calculated under different blockage scenarios.The results indicate that the three-order polynomial fitting is more suitable for the observation sea area than the Karman-Prandtl model.When the blocking height is less than 7 m,the minimum of the force is small,which is the safety zone of the rope;when the height of blockage is greater than 7 m,the maximum of the force shows a significant linear increase with the elevation increasing.Consequently,the section of the net above 7 m is identified as a high-risk area,where the structural risk escalates gradually with increasing blockage height.
作者
王永新
姚兴瑞
林旭东
牛茂昌
WANG Yongxin;YAO Xingrui;LIN Xudong;NIU Maochang(Liaoning Hongyanhe Nuclear Power Co.,Ltd.,Dalian 116319,China)
出处
《海洋开发与管理》
2025年第9期58-68,共11页
Ocean Development and Management
基金
国家自然科学基金(42206221).
关键词
海流流速观测
剖面流速拟合
核电冷源安全
拦网响应规律
Current velocity observation
Velocity profile fitting of
Nuclear power cold source safety of
Law of network response
