Finite Element Simulation And Analysis For Spur Crashed By Drift Ice Based On LS-dyna

While winter alternates with spring,the dikes dam damaged very much due to the impact of ice mass along the water current.This has caused considerable problems in the process of waterway dredging.Therefore,it is very important to analyze the dynamic response of hydraulic structures such as groin and ice-impact,analyze the stress and strain caused by the collision.At the beginning of this paper,the current research on ice disasters at home and abroad is introduced firstly.Some basic physical properties and stress characteristics of ice are described.The software ANSYA-LS-Dyna is studied in detail.The application and calculation knowledge of LS-Dyna software was mastered.Accurately simulate the complex non-linear process of ice impinging on the spur,so as to obtain the accurate analysis result of the dynamic impact.This will provide a convenient reference for anti-icing impact of other hydraulic structures in the future.The main conclusions of this paper are as follows:(1)During the process of impacting the buttocks,the ice flows through the impact of each other,and various stress curves are obtained,from which it can be analyzed where the maximum stress is absorbed and the most unfavorable position is found in the normal collision state,The reinforcement and construction design,have provided a reference value.(2)When the ice and the dike are colliding with each other,the displacements of the various parts of the dike are as follows: the head of the dam,the contact position of the ice and the dyke,and the tail of the dam and the fixed end.Therefore,the dam head and dam body contact position should be well protected to prevent shear damage.(3)When the flow ice is fixed with length and width,the flow velocity of ice is fixed,and the impact of the flow of ice with different thickness of the dam,the ice force generated by ice flow increases with the increase of the thickness.When the size of ice flow is fixed,the ice dam of different speed is hit by ice flow,and the ice ice ice force increases with the increase of velocity.(4)Through this numerical simulation,when the flow of ice from the Sanxing Shoal is impacted with spur,the flow ice with a size greater than 600cm×500cm×30cm and the flow ice with a small size but fast flow velocity such as 400cm×400cm×30cm are greater than 2.0m/s.When the speed is flowing,the optimal ice-breaking method is adopted,and use rocket shaped ice breaking can be broken by breaking ice to protect the hydraulic buildings,so as to achieve the purpose of preventing the disaster.