Abstract
A deep-towed seismic system is an effective tool for exploring minerals in strata. Because the exploration accuracy is closely related to the towing depth and array cable shape, a computational framework based on the flexible multi-body dynamics system is proposed to analyze the dynamic characteristics of the deep-towed seismic system caused by the mothership motion and sea current. The towing cable and seismic array cable are modeled using the absolute nodal coordinate formulation (ANCF), and several classical towing cases are designed to systematically analyze the influences of the mothership motion and current. The results indicate that the axial motion of the mothership along the towing cable is approximately rigidly transmitted, and the phase difference is related to the curvature distribution of the towing cable. In addition, currents parallel to the towing speed significantly change the towing depth. These dynamic characteristics can inform the design of array cable arrangements and control algorithms.
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