摘要
膜结构是一种风敏感性结构,结构与风的耦合作用不容忽视。将膜结构所处的风场简化为不可压缩势流,运用边界元法求解绕流后作用在膜结构上的风压,然后计算在风压作用下膜结构产生的变形,修正膜结构形状,再次求解变形后膜结构周围流场及作用在其上的风压,这样依次迭代,直至得到收敛的解。这种方法的有效性通过典型算例和其他方法计算结果的对比得到验证。变换膜结构的矢跨比、初始预张力及风场平均风速,研究参数变化对流固耦合的影响,为膜结构抗风研究与工程实践提供参考。
Fluid-solid interaction can not be neglected in analysis of a membrane structure due to its sensitivity to wind.The wind flow was treated as incompressible and potential here.Firstly,the wind pressure on the structure was determined by means of the boundary element method(BEM).Afterwards,the structure deformation under the pressure of wind was calculated and then the shape of the membrane structure was modified.Subsequently,the BEM was used to calculate again the wind pressure,the deformation of the structure under the revised pressure was obtained.This procedure was repeated until the solution satisfied the convergence criterion.Typical examples were analyzed,they showed the efficiency and the accuracy of the method as compared with other numerical methods.The analysis of the wind-structure interaction was performed with the proposed method considering parameters,such as rise-span ratio,prestress and the wind velocity.The results are very useful for anti-wind study on membrane structures.
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第1期123-130,共8页
Journal of Vibration and Shock
基金
国家自然科学基金资助(项目编号:50678036)
关键词
张拉膜结构
流固耦合
边界元法
membrane structures
fluid-solid interaction
boundary element method(BEM)
