Vibration Characteristics of Crude Oil Pipeline Considering Fluid-solid Coupling Effect

To find out the influence mechanism of fluid-solid coupling effect on the vibration characteristics of crude oil pipeline and improve the calculation speed of fluid-solid coupling method for solving the dynamic problems of oil pipeline, a finite element calculation theory and method based on the coupling of crude oil fluid sound field and pipeline solid field are proposed. Taking the crude oil pipeline as the research object, the dynamic finite element calculation model structure based on the acoustic-solid coupling method is established, and the pipeline as the physical field and the crude oil as the calculation parameters of the acoustic field are determined. The simulation analysis of 11 working conditions under different pipeline lengths is carried out, and the first six natural frequencies and vibration modes of the acoustic-solid coupling finite element model structure are obtained, and the results are compared with those of the traditional fluid-solid coupling calculation. The research shows that the sound-solid coupling method can ensure the correctness of the calculation results by solving the dynamic characteristics of the crude oil pipeline considering the fluid-solid coupling effect. Compared with the traditional calculation method of fluid-solid coupling, the calculation speed is greatly improved, and the occupation of computer memory is reduced.