Abstract
Beam is an important component of CNC double column vertical lathe, its structural design and static and dynamic characteristics have direct influence on the machining accuracy and service life of the machine tool. The test object is a machine tool beam provided by the Heng-sheng machine tool plant, using test method of single-point excitation provided by hammer force and mobile acceleration sensor. The paper employs Poly-Max, the most widely used modal parameter identification method, to analyze the measured frequency response function data so as to derive the modal parameters, including intrinsic frequency, damping ratio and mode of vibration. Beams of the modal test of beam model is set up, collecting data and setting parameters. By analyzing the intrinsic characteristics of structure, beam structure optimization strategy can be developed. The paper provides a theoretical basis for the structural optimization design and manufacturing of similar components and parts.
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