The Finite Element Simulation Analysis and Modeling Method of the Influence of Cable Pretension Force on the Vibration of Marine Winches

Abstract

Marine winches are prone to vibration issues in dynamic marine environments due to the mechanical behavior of cables, which can affect the stability and safety of the equipment. This study, based on finite element simulation technology, proposes a refined modeling method for the cable-winching system. It employs cable elements (Cable280 elements) to simulate the large deformation and nonlinear mechanical behavior of cables. By combining static and harmonic response analyses, the research systematically investigates the dynamic response characteristics of winch vibrations under different pre-tension force conditions. The findings reveal that flexible cables can experience displacement reaching 10%-20% of their length under load, necessitating large deformation analysis. Stress is concentrated on the drum and distributed in an annular pattern. Harmonic response analysis indicates that pre-stress significantly influences high-frequency vibrations (6000-8000Hz), and the mechanism by which pre-tension force affects vibration characteristics is analyzed. The research results provide theoretical basis and technical support for the structural optimization, vibration suppression, and pre-tension parameter design of marine winches.