Modal Analysis of the Surface Grinding Machine Structure through FEM and Experimental Test

Abstract

Machine tool vibrations have great impact on machining process. In this paper the dynamic behavior and modal parameters of surface grinding machine is presented. For this purpose, the CAD (computer aided design) model of the surface grinding machine structure is provided in catia and then Natural frequencies and mode shapes of the machine tool structure are carried out through FEM (finite element method) modal analysis under ansys. The model is evaluated and corrected with experimental results by modal testing on surface grinding machine. Finally, the natural frequencies and mode shapes obtained by both experimental and FEM modal analysis are compared. The results of two methods are in widely agreement.

Modal analysis of the vertical moving table of 4-DOF parallel machine tool by FEM and experimental test

“…However, some considerable advanced methods have been achieved in the development of experimental methods for determination of the mode shapes of machine tool structures as well as parallel kinematic mechanisms. Several researchers have studied the vibration analysis of the machine tool structures involved in machining system using their stiffness measurements and modal analysis [2][3][4].…”

“…Moreover, several modal analysis have been reported in the literature [11,12] to extract the vibration frequencies and modes of various industrial structures such as rotor system, aerospace structures and etc. Pakzad et al [3] and Pedrammehr et al [13,14] have studied the dynamic parameters of different types of the grinding and milling machines using experimental modal analysis and the results are compared by the finite element study. Mahboubkhah et al [15] utilized modal analysis of the hexapod table to investigate the proper machining conditions of different configurations.…”