【摘要】 应力集中现象经常出现在结构的设计中,为有效的降低应力集中保证结构部件的力学性能与寿命,针对主轴结构提出了基于DOE的方法优化设计主轴部件,建立了以最大应力最小化为目标,倒圆角半径和凸台厚度为设计变量的优化模型并进行求解。结果表明,在工程许可条件下尽可能增大圆角半径或者凸台厚度,能有效地减少应力集中;且圆角半径对最大应力影响较大,圆角半径从0.5mm增大到2mm,最大应力下降48%,因此,加工中应确保其加工精度。该方法对主轴零部件的设计加工具有一定的指导意义。更多还原

【Abstract】 To avoid or reduce the stress concentration on the mechanical design,optimization method based on the DOE(Design of Experiment)is proposed;the mathematic model is built and solved,with minimizing the maximum stress as objective and the radius of round corner and thickness of convex plate as design variables.As the results show,stress concentration can be reduced by enlarging the value of the round radius or the thickness of the convex plate,with the engineering requirements,and the effect of the radius on the maximum stress is much larger than that of the thickness of the convex plate,with the radius from 0.5mm to 2mm,and the maximum stress is reduced by 48%.Thus the precision of the manufacturing of the round corner is more important.The presented method is applicable to the design and manufacturing of the components of the axis system.更多还原