桨-轴系-船体耦合振动频响函数子结构综合建模方法验证与分析  

Analysis and Validation of Dynamic Modeling of Propeller-shafting-hull Coupled Vibration Using FRF-based Substructure Method

作　　者：范凯[1] 黄修长[2] 李江涛[3] 刘见华[3] FAN Kai;HUANG Xiuchang;LI Jiangtao;LIU Jianhua(Military Representative Bureau in Shanghai Area of Naval Armament Department,Shanghai 201206,China;Institute of Vibration,Shock and Noise,State Key Laboratory of Mechanical System and Vibration,Shanghai Jiaotong University,Shanghai 200240,China;Marine Design and Research Institute of China,Shanghai 200011,China)

机构地区：[1]海军装备部驻上海地区军事代表局,上海201206 [2]上海交通大学振动冲击噪声研究所机械系统与振动国家重点试验室,上海200240 [3]中国船舶及海洋工程设计研究院,上海200011

出　　处：《噪声与振动控制》2021年第1期16-20,共5页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51875336);上海市青年科技启明星计划资助项目(18QA1402000)。

摘　　要：提出桨-轴系-船体耦合系统振动响应的频响函数子结构综合建模方法。搭建基于减振降噪设计的桨-轴系-船体耦合振动测试的实尺度试验台,开展轴系运转状态下的振动传递测试。利用测试结果,验证频响函数子结构综合建模方法的最大幅值误差在主要频率点处不大于2.0 dB;并对结合数值模拟对测试得到的传递特性进行分析,得到结论为:低频主要峰值为模拟桨的同相振动、模拟桨和轴系耦合1阶纵振模态;推力轴承是模拟桨和轴系耦合1阶纵振模态的有效传递通道。FRF-based substructure method is proposed for dynamic modeling of vibration transmission of a propellershafting-hull coupled system.A real-scale test rig for the propeller-shafting-hull coupled system testing is built.Vibration transmission test is carried out on this test rig for the shafting system operating at different rotational speeds.Based on the measured results,the accuracy of the FRF-based substructure method is validated.It is shown that the maximum error to predict the peak responses is less than 2.0 dB.Vibration transmission characteristics of the propeller-shafting-hull coupled system are reported based on the numerical simulation and measured results.It is concluded that the characteristic modes in the low frequency range are the in-phase modes of the propeller and the first longitudinal mode of the coupled propeller-shafting system.The thrust bearing is the principle transfer path of the first longitudinal mode transmission.

关 键 词：振动与波 桨-轴-船体耦合系统 频响函数综合 子结构模态 传递特性 

分 类 号：TB123[理学—工程力学] TH113.1[理学—力学]