CAJ | 학술논문

在考虑高温热变形影响的前提下，对汽轮机调节级叶片枞树型叶根轮缘结构进行了优化研究．采用有限元分析软件Ansys的参数化设计语言APDL建立了枞树型叶根轮缘的参数化模型，以叶根轮缘的8个关键尺寸作为设计变量，以叶根轮缘处最大等效应力达到最小为目标函数，应用模式搜索算法进行优化控制，对叶根轮缘结构进行多变量的优化分析，获得了使叶根轮缘处最大等效应力大幅减小的枞树型叶根轮缘优化型线．结果表明：相对于原始结构，优化后，叶根和轮缘处的最大等效应力分别降低了19．84％和6．48％，提高了汽轮机运行的可靠性．
재고필고온열변형영향적전제하，대기륜궤조절급협편종수형협근륜연결구진행료우화연구．채용유한원분석연건Ansys적삼수화설계어언APDL건립료종수형협근륜연적삼수화모형，이협근륜연적8개관건척촌작위설계변량，이협근륜연처최대등효응력체도최소위목표함수，응용모식수색산법진행우화공제，대협근륜연결구진행다변량적우화분석，획득료사협근륜연처최대등효응력대폭감소적종수형협근륜연우화형선．결과표명：상대우원시결구，우화후，협근화륜연처적최대등효응력분별강저료19．84％화6．48％，제고료기륜궤운행적가고성．
The research on optimization of fir-tree root and rim for turbine control stage blades was conduc ted in eonsideration of high temperature thermal deformation. A parametric model for the fir-tree root and rim was established based on the parametric design language APDL from the finite element software Ansys, with which multivariable optimization was carried out for the structure of the root and rim using pat-tern search algorithm, by taking 8 critical geometrical parameters as design variables and the maximum equivalent stress of the root and rim as objective function, and hence an optimized structure obtained at the premise that the maximum equivalent stress was evidently reduced. Compared with the original structure, the maximum equivalent stress of the optimized root and rim can be reduced by 19.84% and 6.48% respec- tively, resulting in increased operation reliability of steam turbines.