基于流固耦合龙卷风作用核电常规岛主厂房响应研究  

Tornado-induced response analysis for main power house in conventional Island of nuclear power plant based on fluid-solid coupling method

作　　者：王美珍[1] 吕令毅[1] 

机构地区：[1]东南大学土木工程学院,南京210096

出　　处：《工程建设》2017年第3期23-26,32,共5页Engineering Construction

摘　　要：基于弱耦合求解策略,利用ANSYS-CFX软件对核电常规岛主厂房钢框架结构与三维龙卷风场的流固耦合效应进行了CFD数值模拟,并就结构在龙卷风风场作用下的表面风压及位移响应进行了研究。研究结果表明:当龙卷风袭击结构时,屋顶及近涡旋中心侧面出现负压区,而最大正压出现在迎风面;结构的最大位移出现在结构迎风面的屋角处;单向流固耦合和双向流固耦合下两种情况下的位移相差较大,相对误差达到36%。因此,在结构的抗龙卷风设计中考虑结构与龙卷风场的耦合作用有一定的必要性。Based on the weak coupling method, the CFD numerical simulation of the fluid-solid coupling of the steel frame structure in conventional nuclear power plant and in 3D tornado field is carried out by aid of ANSYS-CFX software,and the surface wind pressure and displacement response under the tornado wind action were studied. The results show that, when tornado strikes the structure, the negative pressure area appears on the roof and adjacent side of the vortex center,whereas the maximum positive pressure appears on the windward side. The maximum displacement of the structure appears at the comer of the structure＇s windward side ; and the big displacement difference data shows in the respectively distinct cases of the two-way fluid-solid coupling, as the relative error reached 36%. There- fore, considering the coupling effect of structure and tornadoes in the field of anti-tornado design of the structure has its certain necessity.

关 键 词：龙卷风 流固耦合 核电常规岛主厂房 风压荷载 CFD数值模拟 

分 类 号：TU311.3[建筑科学—结构工程] TU323.4