爆炸与冲击2023，Vol.43Issue(12)：54-67,14.DOI:10.11883/bzycj-2023-0113
水动力作用下流冰撞击闸墩的动力响应研究
Dynamic response of flowing ice colliding with a sluice pier under hydrodynamic action
摘要
Abstract
In frigid regions,the construction of sluice pier structures within river systems is confronted with considerable challenges arising from the presence of severe ice loads and ice-induced vibrations.The collision process between ice and sluice piers is further complicated due to the intricate hydrodynamic effects exerted by water.The arbitrary Lagrangian-Eulerian(ALE)fluid-structure interaction(FSI)method is employed in this research to meticulously account for the fluid forces acting upon both the ice and sluice pier surfaces.A comprehensive coupled model encompassing the interactions among water,ice,and sluice piers is established to thoroughly investigate the mechanical characteristics associated with ice-sluice pier collisions under highly unpredictable conditions.Corresponding ice-concrete collision tests are meticulously designed and conducted,revealing an exemplary concurrence between the simulated impact forces and the values obtained from experimental observations.Upon analyzing the fluid-structure interaction and hydrodynamic effects,the present study demonstrates that the water-ice-sluice pier coupled model adeptly captures the fluid characteristics inherent to water.During the approach of an ice mass towards a sluice pier,the initial hydrodynamic effects initiated by the water medium effectively augment the kinetic energy possessed by the ice.As the ice forcefully interacts with the sluice pier,the water medium swiftly generates a transient high-pressure field,thereby establishing a phenomenon colloquially referred to as the water cushion effect.This effect is manifested by absorbing a portion of the ice's kinetic energy,effectively dampening its movement.Distinctive scenarios characterized by varying ice volumes and compression strengths elucidate that the ice forces exerted upon the sluice pier structure directly correlate with the magnitude of the ice volume,while the influence of ice compression strength on said forces is relatively negligible.The consequential damages inflicted upon the ice and the response exhibited by the sluice pier structure primarily manifest within the contact area at the moment of collision.Consequently,the collisions between ice and the sluice pier structure induce vibrations that are uniquely attributed to ice-related factors.The volume of ice significantly influences the acceleration of sluice pier vibrations.Furthermore,under the condition of maintaining a consistent ice volumes,an increase in compression strength yields only marginal discrepancies in vibration amplitude.This finding convincingly substantiates the critical role played by ice volume as the paramount parameter governing ice-sluice pier collisions.关键词
流固耦合/水动力/闸墩/撞击力/冰激振动Key words
fluid-structure interaction/hydrodynamic/sluice pier/collision forces/ice-induced vibration分类
数理科学引用本文复制引用
杨腾腾,贡力,董洲全,杜云飞,崔越..水动力作用下流冰撞击闸墩的动力响应研究[J].爆炸与冲击,2023,43(12):54-67,14.基金项目
国家自然科学基金(51969011) （51969011）
甘肃省科技计划资助项目(21JR7RA301) （21JR7RA301）
甘肃省黄河水环境重点实验室开放基金(21YRWEK003) （21YRWEK003）
甘肃省教育厅优秀研究生"创新之星"项目(2023CXZX-600) （2023CXZX-600）
