摘要
将结构声强法引入卫星振动传递分析领域,研究飞轮扰动下卫星舱体结构的振动能量传递规律,辨识主导传递路径和波形。根据等效板理论对舱体结构蜂窝板等效并建立有限元模型,通过测力平台获取飞轮扰动力和力矩进行激励加载,结合命令流进行数据提取,利用结构声强法获得振动能量并将其传递过程以流线云图方式呈现,实验也验证了蜂窝耦合结构振动能量流计算的正确性。通过对模型上能量流动分析,对振源到相机安装区域的传递路径进行划分,对比各路径不同波形的净传递比及振动总能量,分析不同路径上波形参与能量传递情况,确定主要传递路径及波形。结果表明:从左隔板传递到相机区域的总能量最大;4条路径中纵波的净传递比均大于0.68,为参与能量传递的主要波形;振源及相机安装区的弯曲波能量最大,纵波、剪切波起到能量传递及转化的作用。
Structural sound intensity method is introduced into the field of satellite vibration transmission analysis in this paper,in order to study the vibration energy transmission law of the satellite cabin structure under the disturbance of the flywheel,and to identify the dominant transmission path and waveform.According to the equivalent plate theory,the cabin structure honeycomb panel can be equivalent and its finite element model is established.The flywheel disturbance force and torque are obtained through the force measurement platform for excitation loading,combined with the command stream for data extraction.Then,the structure sound intensity method is used to obtain the vibration energy and transfer it to the process.So,the streamline cloud diagram can be presented,and the correctness of the calculation of the vibration energy flow of the honeycomb coupling structure is verified by experiments.Through the analysis of the energy flow on the model,the transmission path from the vibration source to the camera installation area is divided.Moreover,the net transmission ratios of the different waveforms of each path and the total vibration energy are compared,and the waveform participating in the energy transmission on the different paths is analyzed,to determine the main transmission path and waveform.The results show that the total energy transmitted from the left partition to the camera area is the largest.Furthermore,the net transmission ratios of longitudinal waves in the four paths are all greater than 0.68,which are the main waveforms involved in energy transmission.In addition,the bending wave energy of the vibration source and the camera installation area is the largest,longitudinal waves,shear waves play a role in energy transfer and transformation.
作者
崔征
徐洋
申妍
尹显波
CUI Zheng;XU Yang;SHEN Yan;YIN Xianbo(School of Mechanical Engineering,Donghua University Shanghai,201620,China)
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2024年第1期60-66,197,共8页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金天文联合基金资助项目(U1831123)。
关键词
卫星舱体
振动能量
结构声强
传递路径
振动波
satellite module
vibration energy
structural sound intensity
transmission path
vibration wave
作者简介
第一作者:崔征,男,1996年1月生,硕士生。主要研究方向为卫星振动传递规律。E-mail:cuizhengdhu@163.com;通信作者:徐洋,女,1977年8月生,博士、教授、博士生导师。主要研究方向为大型复杂机械耦合系统建模及振动控制。E-mail:xuyang@dhu.edu.cn。
