215 Vibration Control and Modal Analysis Technology of Scaled Carbody * Bingrong Miao a , Ying Zhang, and Xujuan Li State Key Lab of Traction Power, Southwest Jiaotong University, Chengdu, 610031, China E-mail: a brmiao@163.com www.swjtu.edu.cn In order to study the high speed railway vehicle carbody dynamic property and vibration control problems, 1/8 scaled carbody rig has been designed and manufactured. Firstly, the scaled test rig is built and performed an experimental modal test technology. Secondly, finite elements computational modal analysis has been carried out to determine the structural dynamics behavior of the realized model compared the field modal test results. Finally, the achieved results verify the predicted dense lying carbody eigenvalues frequencies between these two kinds of method. The accomplished experimental modal analysis provides a sophisticated basis to improve dynamic property of scaled carbody structure for vibration control. The results are shown that scaled carbody test rig design and modal analysis technology can be effectively used to predict objectively the carbody comfort and bending vibration. Keywords: Railway; scaled carbody; high speed train; modal analysis; finite element method. 1. Introduction The lightweight railway vehicle carbody structures require additional control measures to overcome the drawback of increased structural vibrations and fatigue resistance weakens. During the last decade years, many vibration control approaches for suppression of the structure vibration theory were proposed [1, 2]. On the one hand, railway carbody structure vibration control and modal analysis technology were studied during these years. In reference [3] and [4], the 1/10 scaled carbody test rig is built to compare different concepts for suppressing metro carbody structural vibrations. On the other hand, the increasing operational speeds and huge number passenger demands require focusing on the carbody vibration control requirements of railway vehicles. Furthermore, it seems that classical railway vehicles material are being replaced * This work is supported by National Natural Science Foundation of China (Grant No. 51375405). Computer Science and Engineering Technology (CSET2015), Medical Science and Biological Engineering (MSBE2015) Downloaded from www.worldscientific.com by Dr. BING-RONG MIAO on 12/20/15. For personal use only.