An Experimental Identification Method for the Nonlinear Vibration Isolator with Unsymmetrical Dynamic Characteristics
Zhang C B1, Zhang X X2, Song H W1
1. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China2. Department of Mechanics and Engineering Science, Fudan University, Shanghai 200433, China
Abstract：When the vibration isolator stays in a biased situation induced by gravity, assembly stress etc., there will be a complex dynamic phenomenon with unsymmetrical characteristic in the concrete as rigid drift. Besides, this kind of drift has intimate relationship both with external exciting frequency and its amplitude. On the other hand, the vibration sensors mainly suit for the measurement of dynamic signals. Therefore, they have some deficiencies like blunt sensitivity and low accuracy in the measurement of constant and slowly varying signals. When these sensors are applied to the experiment of the unsymmetrical systems mentioned above, the rigid drift data will be measured inaccurately or even lost, which can cause great difficulty to the system’s parameter identification. According to this problem, a simple iteration algorithm based on the principle of harmonic balance is constructed for the parameter identification of unsymmetrical dynamic systems so that it is still efficient in the case of the losing of the rigid drift information. After the demonstration of a numerical simulation, this algorithm is successfully applied to the parameter identification of a real vibration isolator. The results show that the identified parameters have satisfying coincidence with the isolator’s experimental dynamic character.
张呈波 张晓旭 宋汉文. 一类具有非对称特性的隔振装置结构参数实验辨识方法[J]. , 2013, 32(6): 18-23.
Zhang C B;Zhang X X;Song H W. An Experimental Identification Method for the Nonlinear Vibration Isolator with Unsymmetrical Dynamic Characteristics. , 2013, 32(6): 18-23.
2013, Vol. 32 
