Dynamic response of water-hammer pressure wave and arch bridge composite structure of inverted siphon pipeline based on two-way fluid-structure coupling
When the pressure gate valve is closed in the large-span inverted siphon pipeline,it is usually accompanied by the phenomenon of water hammer.At the same time,the coupling effect of the fluid and the solid exists.In order to study the pressure wave under different valve closing time and the dynamic re-sponse of the structure with considering the coupling effect,the overall hydraulic calculation is carried out with taking the large-span inverted siphon pipeline and the arch bridge structure as the research objects.Based on the fluid-structure coupling analysis theory,the water hammer pressure wave calculated by the overall hydraulic model is used as the loading condition of the fluid part,and the two-way fluid-structure coupling analysis is carried out on the workbench platform to solve the displacement,internal force,and stress of the bridge structure.The results show that under different valve closing time conditions,the change trend of the water hammer pressure wave curve is roughly the same,and the displacement time his-tory curve of each monitoring point of the structure is basically consistent with the law of the water hammer pressure wave curve.When the valve is closed at a constant speed,increasing the closing time of the gate valve can be an effective measure to reduce the water hammer pressure;the water hammer force has the greatest effect on the bridge pipe,followed by the cover beam,and the arch ring is the smallest,and the dy-namic response of the structure mainly occurs along the bridge direction.
维普
万方数据
