列车白车身损耗因子试验研究

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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.

Key words： body in white (BIW) statistical energy analysis(SEA) total loss factor internal loss factor coupling loss factor Hilbert transform

Received: 26 January 2014 Published: 15 March 2015

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2015/V34/I5/20

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