Vibration measurement and structural optimization simulation of a boom type tunneller

In this paper, the method of vibration measurements and structural optimization simulation of AM50 tunneller are presented. The vibrations of the tunneller were measured in real time when it was used for cutting a man-made coal bed as well as cutting a real coal bed. The measured results indicate that in these two kinds of working conditions the vibration characteristics are quite similar, that is, the man-mad coal bed can be used in research on the vibrations of AM50 tunneller instead of the real one. A modal model of the machine was then established, and the intrinsic vibration characteristics of AM50 tunneller were investigated by means of the method of experimental modal analysis. Besides, the vibration response simulation under a set of measured loading spectra and the structural dynamics modification are also carried out with the help of structural analysis software. The results can not only facilitate the structural dynamics modification of AM50 tunneller but also provide the foundation for the optimal design of new types of tunneling machines‥