A Fast Algorithm for Changeable Streamer Towed System of Seismic Survey Vessel Based on Generalized-α Method

摘要

This paper presents a motion mathematical model of seismic towed system with changeable length of streamer in a uniform flow by adding the virtual mass point. To solve the problem that calculating the tension of changeable cable has perturbations by using finite difference method, a new numerical scheme which disperses the dynamic equations of streamer with generalized-α method and disperses the dynamic equations of tail buoy with finite difference box method is presented. The theoretical analysis and simulation prove that this scheme can filter high-frequency perturbation effectively and has faster computing speed and better convergence than finite difference method.