Finite Element Analysis on Vibration of Lifting Pipeline

According to the theory of wave and current, the load of deep-sea mining lifting pipeline suffered in ocean environment is analyzed. Mechanical model of lifting pipeline is established by adopting Finite Element software of ANSYS, the stress of the first section of pipeline below sea level under combined effect of hydrostatic pressure, wave and current and plane stress of lifting pipeline at different water depth of 2000 m, 3000 m, 4000 m, 5000 m are studied in details, mode analysis of lifting pipeline of 5000 m length is also researched, and the first ten order natural frequency and modal shape are attained. Analytic results have an important significance on the design, check and choose of lifting pipeline, and it also provides some references for the further study on vibration mechanism and reduction.