Investigation on the fluid–structure interaction effect of an aerostatic spindle and the influence of structural dimensions on its performance

Abstract

The performances of aerostatic spindle are highly affected by the fluid–structure interaction between air film and solid structure. This paper proposes a comprehensive two-way fluid–structure interaction model to analyze the fluid–structure interaction effect of an aerostatic spindle. The structure deformation induced by air film pressure is considered to predict the actual performance of aerostatic spindle. Furthermore, to provide theoretical basis for the structure parameters design, the influence of structural dimensions (such as the thickness of thrust plate) on its performance is investigated, and optimal structural parameters are acquired. The stiffness of aerostatic spindle with varying thrust plate thickness is tested to verify the reliability of simulation results.

Keywords

Aerostatic spindle stiffness fluid–structure interaction ultra-precision machining optimization

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