针对抬底千斤顶导向轴断裂现象,研究了其断裂的原因,并采用Matlab中的非线性函数fmincon对导向轴中部截面进行优化设计。结果表明:导向轴中部开有互相垂直的通孔是造成断裂的原因所在。提高材质和优化截面尺寸均可加强导向轴强度,在取相同安全系数1.5的前提下,提高材质方法需要Q690以上的板材;优化截面尺寸方法,导向轴中部需要组焊同材质厚度为的加强板。比较两种方案,优化截面尺寸更能节省成本。 Aiming at the rupture of the guide shaft of the jacking jacker, the reason of the rupture was studied. The mid section of the guide shaft was optimized by the fmincon nonlinear function in Matlab. The results show that: the middle of the guide shaft to open mutually perpendicular through-hole is the cause of the fracture. Improve the material and optimize the cross-section size can enhance the strength of the guide shaft, taking the same safety factor of 1.5 under the premise of improving the material method requires more than Q690 plate; optimization of cross-section size method, . Compare two kinds of schemes, optimize the sectional size more and save the cost.