Experimental study of loss factors for train carriage body in white
The train carriage body in white (BIW), with the length of 7 meters, is divided into 6 subsystems. Based on the energy balance equation, the interrelation of total loss factor, internal loss factor and coupling loss factor of subsystems can be determined. Therefore, Internal loss factor and coupling loss factor can be calculated by using experimental results of total loss factor and the energy ratio. In order to improve the accuracy of experimental results of total loss factor, a method of Hilbert transform, in which input power does not need to be measured, is introduced to calculate logarithmic decrement of transient response. Parameter results of loss factors can be used for building up statistical energy analysis(SEA) model of high speed railway carriage.
1. University of Chinese Academy of Sciences, Beijing, 100190;
2.Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100190
Abstract：The train carriage body in white (BIW), with the length of 7 meters, is divided into 6 subsystems. Based on the energy balance equation, the interrelation of total loss factor, internal loss factor and coupling loss factor of subsystems can be determined. Therefore, Internal loss factor and coupling loss factor can be calculated by using experimental results of total loss factor and the energy ratio. In order to improve the accuracy of experimental results of total loss factor, a method of Hilbert transform, in which input power does not need to be measured, is introduced to calculate logarithmic decrement of transient response. Parameter results of loss factors can be used for building up statistical energy analysis(SEA) model of high speed railway carriage.
欧阳山1,2，鲁帆2，伍先俊2，隋富生2. 列车白车身损耗因子试验研究[J]. 振动与冲击, 2015, 34(5): 20-25.
Ouyang shan1,2 Lu fan2 Wu xianjun2 Sui Fusheng2. Experimental study of loss factors for train carriage body in white. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(5): 20-25.
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