微造型对平行表面应力影响的流固耦合分析

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基于CFD的流固耦合技术，研究了微造型对平行表面应力分布规律的影响。分别建立了具有单个及多球冠状微造型的平行表面流固耦合有限元模型，着重分析微造型表面上应力变化。计算结果表明：微造型表面的最大应力会随微造型长度增加而增大；微造型深度的增加会造成微造型表面应力的波动；微造型布置方向、距离及其相互间干涉均能显著改变微造型表面的应力幅值和分布。 The effect of dimples on the slress of parallel surfaces is studied by the fluid-structure interaction technology of CFD. Finite element models for single and multiple spherical cap dimples are separately established. The variation of stress on the dimpled surface is analyzed. Numerical results show that the maximum stress of the dimpled surface increases significantly with increasing dimple length. The increase in dimple depth results in an obvious stress fluctuation. The peak value and distribution of the stress depend largely on the dimple layout direction, the distance and interaction between dimples.