Dynamic Analysis and Multiparameters Optimization of Hydrostatic Supported Worktable System

The natural frequency at lower orders for hydrostatic supported worktable system may easily give rise to vibration as in resonance with excitation frequency. This paper is concerned with the geometrical optimum design and dynamic modal analysis for system with hydrostatic oil fluid and worktable simultaneously. The variations of eigenfrequency, respect to oil film thickness, outer radius of worktable, recess shape and number, were discussed. The results show that, under linear increment/decrement of geometry dimension, frequency increase/decrease but in nonlinear regularity. Therefore there exists an optimum dimension resulting the optimum frequency that deviate from the rotary frequency at work and its multiple ones. Then two-phase optimization strategy was effectively programmed to get involved with finite element analysis software. It is theoretically critical to get the optimum parameter of hydrostatic supported worktable on how and practically important to guide the design in engineering.