Finite Element Analysis On The Stability Of A Bridge Drilling Platform

In civil engineering,drilling platform is a kind of temporary constructions which used in water.Trestle usually used to transport materials,equipment,personnel and connect drilling platform and land.It's a very important part of bridge engineering.In view of the importance of trestle and drilling platform in construction and its special temporariness,the design needs to consider both the bearing capacity of the structure and the economy of the dismantling and the stability of drilling platform.Based on the existing design theory and methods,this paper briefly introduces the methods of legislation,stability theory and modal analysis,combined with finite element knowledge and finite element software Midas,the static performance and some dynamic performance of the platform of the steel bridge and drilling under heavy load are analyzed in detail in engineering practice.The main work of this paper is as follows:(1)This paper introduces a large number of papers and drawings,and introduces the design method and calculation theory of steel bridge,including allowable stress method,stability theory and modal analysis method.And made a brief introduction of the construction of steel bridge and heavy duty drilling platform in engineering practice.(2)The strength and stability of steel trestle bridge are analyzed by finite element method and finite element analysis software Midas.The principle and analysis process of the finite element analysis method are described in detail by an example of simply supported beam.Combined with steel trestle construction information,the steel bridge modeling,load values,the selection of boundary conditions are introduced briefly in engineering practice.Finally,the strength and stability of the steel trestle are analyzed according to the finite element calculation results,and the reinforcement measures of the steel trestle are put forward for the relatively weak structure.(3)The finite element analysis method and finite element analysis software Midas were used to analyze the static analysis of the drilling platform,the stability analysis of the platform and the influence of the lateral linkage system on the rigidity of the platform in engineering practice.The static analysis is used to check whether the bearing capacity and use requirements are satisfied.The eigenvalue analysis is used to understand the dynamic characteristics of the platform;And the influence of transverse linkage system on the whole rigidity of the platform is analyzed by setting up a variety of different transverse joint system schemes,it can help to obtain The optimal horizontal connection scheme and to optimize the design of the platform.