基于Workbench的缩套式超高压缸体优化设计

Optimum Design Based on Workbench for Shrink Sleeve Type Ultrahigh Pressure Cylinder

某设备的缩套式超高压缸体存在内壁始终为应力最大位置,且缸体应力分布相当不均匀的问题。为满足缸体最大等效应力小于缸体材料的屈服极限,以内外缸体内壁剪应力相等为约束条件,结合过盈配合及设计要求,利用响应面法对缩套式超高压缸体进行优化设计。结果表明,缸体的过盈量从优化前的0.30 mm减小到优化后的0.2662 mm,降低了内外缸安装套合时的工作难度;内缸内壁到外缸内壁的等效应力的变化率从优化前的0.787 MPa/mm降为0.0568 MPa/mm,缸体的应力分布不均匀性较优化前有了较大的改观。

The internal wall of tlie sleeve type ultrahigh pressure cylinder of a certain gest stress position, and the cylinder stress distribution is quite uneven. Under tlie conditions quivalent stress of cylinder is less than the yield limit of cylinder material and the shear stresses of internal walls ofinner and outer cylinders are equal, combining wit!i the interference fit and the design requirements, we use the re-sponse surface met!iod to optimize the design. The results show that the interference of cylinder decreases from 0. 30 mm before optimization to 0. 2662 mm after optimization, which reduces the dificulty cylinders. The change rate of t!ie equivalent stress from the inner wall of inner tubder is reduced from 0. 787 MPa/mm to 0. 0568 MPa/mm after optimization, and the stress distrilDution heterogeneity of cylinder is greatly improved compared wit!i that before optimization. The study can provide a reference for the op-timal design and the improvement of t!ie stress distrilDution of sleeve type ultrahigh pressure cylinder.