Abstract: This article focuses on the vibration characteristics of the radar mast of a bulk carrier and the corresponding vibration reduction design. The finite element model of the radar mast is established according to the structure and layout drawings of the radar mast based on the finite element model of the whole ship. It is found that there is a resonance risk between the radar mast and the frequency pulsation pressure of the propeller blade through the modal analysis and vibration response analysis of the radar mast. After communicating with outfitting, electrical and other relevant fields, three vibration reduction schemes are proposed including reducing the height of the radar mast platform, strengthening the braced structure and increasing the counterweight block. The best scheme is selected according to the calculation results for final vibration reduction design of the radar mast, avoiding the vibration risk of the radar mast during the detailed design stage.

Key words: radar mast, finite element vibration analysis, vibration reduction design

摘要： 文章重点研究了某散货船雷达桅杆的振动特性及其相应的减振设计,在全船有限元模型的基础上,根据雷达桅杆结构及布置图纸建立雷达桅杆有限元模型。通过对雷达桅杆的模态分析和振动响应分析,发现雷达桅杆与螺旋桨叶频脉动压力存在共振风险;在与舾装、电气等相关专业沟通后,提出降低雷达桅杆平台高度、斜撑结构加强及增加配重块这3种减振方案,并根据计算结果选择最佳方案,最终实现雷达桅杆的减振设计,在详细设计阶段规避了该船雷达桅杆的振动风险。

关键词: 雷达桅杆, 振动有限元分析, 减振设计