CAJ | 학술논문

针对目前月牙肋岔管设计过程较复杂繁琐和初始设计方案不明确等问题，提出了高效的月牙肋岔管三维参数化设计方法，采用FORTRAN程序语言依据《水电站压力钢管设计规范》( SL 281-2003)形成岔管初始设计方案，据此将岔管相关设计参数导入CATIA设计平台中，进行三维参数化设计，结合有限元分析平台进行结构分析和优化，并开展了结构响应影响因素及其规律研究。为提高岔管结构分析计算精度及获得具有良好安全性和经济性的设计方案，根据研究结果提出以下建议：①主管和支管端部均可取轴向约束，计算模型范围需取5倍公切球半径以上；②岔管分岔角可取75°~80°，月牙肋厚度可取至管壁厚度2倍以下。
침대목전월아륵차관설계과정교복잡번쇄화초시설계방안불명학등문제，제출료고효적월아륵차관삼유삼수화설계방법，채용FORTRAN정서어언의거《수전참압력강관설계규범》( SL 281-2003)형성차관초시설계방안，거차장차관상관설계삼수도입CATIA설계평태중，진행삼유삼수화설계，결합유한원분석평태진행결구분석화우화，병개전료결구향응영향인소급기규률연구。위제고차관결구분석계산정도급획득구유량호안전성화경제성적설계방안，근거연구결과제출이하건의：①주관화지관단부균가취축향약속，계산모형범위수취5배공절구반경이상；②차관분차각가취75°~80°，월아륵후도가취지관벽후도2배이하。
In order to overcome the problems of complexity and indeterminacy of preliminary scheme in present design methods for crescent-rib reinforced branch pipe, a 3D parametric design method is proposed. The FORTRAN language is utilized to generate the preliminary scheme according to the Design Specifications for Steel Penstocks of Hydroelectirc Stations ( SL 281-2003 ) . The design pa-rameters are then imported into the CATIA for conducting parametric design. The finite element a-nalysis software is then used to perform structural analysis and optimization. Moreover, the influence factors of structural response and its law are investigated. In order to improve the accuracy of struc-tural response, and to provide a structural scheme with good security and economy, suggestions are given as follows:( a) Axial restraint could be utilized to the ends of pipes, and a range of at least 5 times of radius of public sphere need to be employed for the calculation model;and ( b) bifurcation angle of 75 ° to 80 ° is a satisfactory selection and a thickness below 2 times of that of pipe can be ac-cepted for crescent-rib.