Research on Measurement of Loss Factor based on Transient State Decay Method

2nd International Conference on Mechanical Engineering and Applied Composite Materials

机械制造;材料工程

Peng, Dewei^1 ; Wang, Na^2 ; Li, Guonan^3 ; Huo, Ruidong^1

College of Shipbuilding Engineering, Harbin Engineering University, Harbin

150001, China^1

chn, Yantai

264001, Yantai^2

chn, Beijing

100192, Beijing^3

关键词: Damping characteristics;    Experimental models;    High frequency HF;    Low-frequency;    Measurement of loss;    Statistical energy analysis;    Transient state;    Variation characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/544/1/012049/pdf
DOI  :  10.1088/1757-899X/544/1/012049

来源: IOP

【 摘 要 】

As an important parameter in application of the Statistical Energy Analysis (SEA), loss factor can measure damping characteristics of a system and determine the ability of vibration energy dissipation. First, the experimental models of steel plate structures are established. And then, the loss factor test is carried out based on transient state decay method. Finally, the variation characteristics of loss factor with medium, thickness and size of structures are explored. The results show that: (1) The loss factor of steel plates has the characteristics that larger at low frequency and small at high frequency, it decreases gradually with the increase of frequency. (2) For the same structure, the loss factor tested in water is greater than the loss factor tested in air. (3) The loss factor increases with the raise of thickness of plates when its cross-sectional dimension is constant.