Abstract: The model of the tunneling machine cutting portion was established by ANSYS. The modal analysis was also carried out and the first three order natural frequency and vibration mode of the tunneling machine was obtained. At the same time, the modal test of the tunneling machine cutting portion was carried out by the method of single-point incentive and multi-point response and the first three order natural frequency and vibration mode of the tunneling machine was obtained. Then the simulation model was revised through the contrastive analysis of the test results and simulation results. These conclusions laid solid foundation of the firm-soft coupling model establishing of the tunneling machine and to promote the digitized of the tunneling machine.

Key words: boring machine, free modal, finite element, modal experiment, Natural frequency