大尺度分段船模低频模态试验方法研究  

Research on low frequency modal test methods for large scale segmented ship model

作　　者：周庆云[1,2] 司海龙 陆晔[1] 王君翔[1] 朱世革 陆天奇 ZHOU Qingyun;SI Hailong;LU Ye;WANG Junxiang;ZHU Shige;LU Tianqi(China Ship Scientific Research Center,Wuxi 214082,China;Taihu Laboratory of Deep Sea Technological Science Lianyungang Center,Lianyungang 222000,China;Shanghai Branch,China Ship Scientific Research Center,Shanghai 200023,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]深海技术科学太湖实验室连云港中心,江苏连云港222000 [3]中国船舶科学研究中心上海分部,上海200023

出　　处：《舰船科学技术》2025年第8期8-12,共5页Ship Science and Technology

基　　金：高技术船舶科研项目(工信部联装函[2016]25号)。

摘　　要：针对某大尺度分段船舶模型,进行低频模态试验方法研究。在船模干模态试验中,通过试验分析悬挂刚度、悬挂位置等对模态试验结果的影响,并进行船模垂向弯曲干模态的测试和计算比较。试验研究表明,大尺度船模悬挂点的位置与低频干模态测量的准确性有关,为减少悬挂对低频模态结果的影响,应将弹性绳悬挂在振动模态节点位置。该试验模态与有限元计算模态结果比较后确认真实有效,该试验方法能大大提高低频模态的测试精度。A low-frequency modal test method was studied for a large-scale segmented ship model.The influence of suspension stiffness,suspension position,etc.on the modal test results was experimentally compared in the ship model dry modal test.And conducted tests and computational comparisons on the vertical bending dry mode of the ship model.Experimental studies have shown that the position of suspension points for large-scale ship models is related to the accuracy of lowfrequency dry mode measurements.To reduce the impact of suspension on low-frequency mode results,elastic ropes should be suspended at the vibration mode node position.After comparing the experimental mode with the finite element calculation mode results,it was confirmed to be true and effective.This experimental method can greatly improve the testing accuracy of low-frequency mode.

关 键 词：船舶模型 模态试验 低频模态 模态参数 

分 类 号：O329[理学—一般力学与力学基础] TB535.1[理学—力学]