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针对传统设计中球形岔管安全系数偏大造成体形笨重及加工制作困难的问题,结合某高水头电站,在合理的几何约束和强度约束条件下建立了球形岔管的数学模型,利用ANSYS一阶优化方法对该数学模型进行优化求解得到最优方案,并对优化前后的岔管结构进行三维有限元计算分析。结果表明,优化后球形岔管在整体应力分布及变形控制等方面均优于原设计方案,减小了偏心受力引起的变形和应力集中现象,不仅减少了钢材用量,且降低了制造成本和难度。
Aiming at the problem of heavy bulky shape and difficult fabrication in spherical ball bifurcation in traditional design, a mathematic model of spherical bifurcation tube was built under the constraint of reasonable geometric constraint and strength by using a high-head hydropower station. Using ANSYS first-order Optimization method to optimize the mathematical model to get the optimal solution, and to optimize the bifurcated structure before and after the three-dimensional finite element analysis. The results show that the optimized spherical bifurcated pipe is superior to the original design in terms of overall stress distribution and deformation control, reducing the deformation and stress concentration caused by eccentric stress, which not only reduces the amount of steel used, but also reduces the manufacturing cost and Difficulty.