Currently, the construction of salt cavern storages in China generally adopts solution mining technology with single-well convection and using a diesel cushion, however, leaching tubing is occasionally subjected to excessive bending and/or breaking during leaching process. Leaching tubing failure leads to the cavern shape being out of control or even scrapped. In this paper, regarding the leaching tubing as vertical hanging pipes conveying fluid, the dynamic equation of the leaching tubing with a Y-type manifold installed at the lower free end is established. The equation of motion is solved by means of Galerkin's truncation approximation method, and the dynamic response of the leaching tubing and the characteristics of the enhanced stability of the manifold are investigated. Since the downstream Y-type manifold has a select of the inclination angle, it is found through theoretical calculations that the flutter instability flow velocity of the fluid-conveying pipe can be conveniently controlled. The physical model experiment verifies that the Y-type manifold has a better enhancement effect on the stability of the leaching tubing. The proposed Y-type manifold may be helpful for the design and improvement of leaching tubing systems in the construction of salt cavern storage and salt mining.

目前，我国盐穴库建设普遍采用单井对流、柴油垫的溶液开采技术，但在浸出过程中有时会出现浸出管过度弯曲和/或断裂的情况。浸出油管故障导致溶洞形状失控甚至报废。本文将浸出管作为输送流体的垂直悬挂管道，建立了下自由端安装Y型管汇的浸出管动力学方程。采用伽辽金截断近似法求解运动方程，研究了浸出管的动态响应和管汇稳定性增强的特点。由于下游Y型管汇具有倾角的选择，通过理论计算发现，可以方便地控制流体输送管的颤振不稳定流速。物理模型实验验证了Y型管汇对浸出管稳定性有较好的增强作用。提出的 Y 型管汇可能有助于盐穴储存和盐矿建设中浸出管系统的设计和改进。