虚拟力计算方法的实验分析  

Experimental Analysis of Virtual-force Computation Method

作　　者：卢丁丁[1,2] 何琳[1,2] 徐荣武[1,2] 

机构地区：[1]海军工程大学振动与噪声研究所,武汉430033 [2]船舶振动噪声重点实验室,武汉430033

出　　处：《噪声与振动控制》2014年第1期16-18,66,共4页Noise and Vibration Control

基　　金：国家自然科学基金(51209214);国防科技重点实验室基金(SYSZC2012006)

摘　　要：在船舶振动传递路径分析和结构响应监测的研究中,往往需要实时了解设备的激励力特性。由于已安装在船体中设备及安装结构的复杂性,实时测量方法的实施变得非常困难。在结构响应和设备激励力存在固有联系的基础上,可以利用与真实激励力等效的虚拟力,重构出与设备运行时一致的结构响应。为解决虚拟力求解过程中存在的导纳矩阵病态问题,在前人虚拟力模型的基础上引入分部优化正则化方法。通过船舶水泵验证实验结果可以看出,经过正则化处理后的虚拟力能够有效降低结构响应的重构误差。In the analysis of ship vibration- transfer path and monitoring of structure response, the characteristics ofequipment’s excitation-force are always necessary. Due to the inherent complexity of the equipment and its infrastructure,the real- time measurement becomes very difficult. On the basis of the inherent relation between structural response andexciting force, the real exciting forces can be replaced by virtual-forces, which can exactly reproduce the structural responsecaused by the equipment operation. In this paper a regularization technique based on partial optimization is introduced intothe virtual-force model to solve the ill-condition problem of the admittance matrix in the process for solution. An experimentis carried out on a pump of the ship. The results show that the errors of the structural response reconstruction with the partialregularization method are effectively reduced.

关 键 词：振动与波 虚拟力 分部优化正则化 病态问题 实验 

分 类 号：TB52[理学—物理]