基于有限元法对自升式船舶进行受迫振动响应分析，建立某自升式船舶三维有限元模型，对整船模态及固有频率与激振频率进行分析，并在加载激励载荷后用模态叠加的有限元方法进行全船振动响应求解。研究该自升式船舶结构振动性能是否满足强度要求，全船固有频率储备系数及所关心区域的振动响应峰值是否满足规范要求。分析了响应峰值不在激励频率附近的原因，为振动预测及控制提供了参考。
Based on the finite element analysis method for forced vibration response analysis of jack-up ship, a three-dimensional finite element models of jack-up ship is established to analyse the whole ship modes and the natural and excitation frequencies, and the whole ship vibration response is solved by the finite element method with modal superposition after loading the excitation loads. The calculation results show that the vibration performance of the jack-up ship structure is good, the whole ship′s natural frequency reserve coefficient and all the areas of interest can meet the specification requirements. The reason why the response peak is not near the excitation frequency is analyzed, providing a reference for vibration prediction and control.
2025,47(3): 1-5 收稿日期：2024-3-12
DOI：10.3404/j.issn.1672-7649.2025.03.001
分类号：U661
基金项目：江苏省自然科学基金面上项目（BK20231255）
作者简介：谷家扬(1979-),男,博士,教授,研究方向为船舶与海洋工程总体设计
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