The Structural Design And Finite Element Analysis Of Offshore Basin Bottom

This paper relies on the university marine engineering projects the offshore basin bottom.At present,the large offshore basin is rare in China,and other domestic and international marine engineering design can not meet the pool bottom pool site requirements of the university.In this case,independent design of lifting materials has become an important part of the whole project,and The scale of the offshore basin bottom is relatively large,the design and analysis of steel structure,also has certain reference value to the same type of large steel structure.The structure of offshore basin bottom is discussed in detail,and combining with the mechanics theory of steel structure,finite element analysis,modal analysis,fluid solid coupling analysis method for offshore basin bottom steel structure system are analyzed,and the guiding column in the wave load conditions are simulated and analyzed..First,according to the design parameters and technological requirements,we design the system structure of the offshore basin bottom under the conditions of meeting the experimental requirements and manufacturing and installation process.Secondly,establish the mathematical model of the main steel structure and some important parts of the use of ANYSYS software,without affecting the structure and the performance of the whole,the model of the simplified structure,according to the actual stress constraint and loading,according to the results of finite element calculation for mechanical analysis,analysis results show that the materials of steel structure and related the structural strength and stiffness can meet the design criterion of steel structure and related requirements of the actual working conditions.Then,on the bottom of steel structure modal analysis is carried out to calculate the natural frequency of the external excitation frequency according to the calculated results and comparative analysis,results show that the excitation frequency of the main structure and the bottom wave driving motor and wave machine to produce swing type less in the resonance range,will not cause resonance,that bottom steel structure is reliable the stable.Finally,the research orientation and response analysis of false bottom under wave loads,analyzed in the bottom wave alternating load deformation and strength,and wave impact on the guide column,the results show that the wave loads under the bottom and a guide column stress and strain are allowed to design requirements within the scope of.This paper through offshore basin bottom of steel structure on the design of marine engineering pool,provides valuable experience for the domestic engineering design of the pool,while considering the complexity of large type and environment offshore basin bottom,offshore basin design and calculation of the pool to provide theoretical basis and calculation experience.