压气机盘片榫连结构接触特性分析

以某压气机燕尾形榫连盘片结构为研究对象,压气机盘片模型共有38个叶片,基于ANSYS有限元软件,选取整盘的1/38进行有限元建模.并考虑了旋转导致的离心力的作用,分析了榫头-榫槽之间的摩擦系数、榫头的安装角和接触面积对接触压力、接触滑移距离的影响.在计算时拉格朗日乘子算法被应用于榫头-榫槽之间的接触计算.研究结果表明:最大接触压力及最大滑移距离随着摩擦系数的增加而逐渐减小;最大接触压力随着榫头安装角的增大而增大,而最大滑移距离没有发生明显的变化;最大接触压力及最大滑移距离随着接触面积的增加而逐渐减小.

Contact Characteristic Analysis of a Compressor Disc Dovetail Structure

Focusing on the compressor disc dovetail structure， where the compressor disc model consisted of 38 blades， the finite element model of 1/38 of the whole plate was established based on ANSYS software. Considering centrifugal force caused by rotation， the effects of friction coefficient， dovetail installation angle and contact area of interface on contact pressure and contact slip distance were studied. The Lagrange multiplier was applied to calculate the contact responses between dovetail and groove. The results show that the maximum contact pressure and maximum slide distance decrease gradually with the increasing of friction coefficient; the maximum contact pressure increases and the maximum slide distance almost keep constant with the increasing of dovetail installation angle; the maximum contact pressure and maximum slide distance of interface gradually decrease with the increasing of contact area.