Research on Dynamic Modeling and Application of Kinetic Contact Interface in Machine Tool

Table 2

The first-six-order frequencies and modes of machine tool computed by FEM method.

Order	Frequency of FEM model (Hz)	Modes	Reasons
1	27.5	Crossbeam bends around the horizontal axis	Junction plate and longeron’s guideway pitching vibration
2	53.7	Crossbeam vibrating up and down. Sliding box bends around the horizontal axis	Crossbeam vibrates, sliding box, and crossbeam guideway’s rolling vibration
3	55.1	Longeron and crossbeam wagging	Longeron’s flexural vibration
4	78.7	Junction Plate’s small amplitudes pitching vibration. Sliding box’s guideway pitching vibration	Junction plate guideway and sliding box guideway’s pitching vibration
5	83.0	Crossbeam bends around axis. Sliding box rolls around axis	Crossbeam’s flexural vibration
6	115.7	Crossbeam’s pitching vibration around axis	Junction plate guideway’s pitching vibration