CAJ | 학술논문

为了研究和解决大跨越输电塔的优化设计问题,以结构截面、根开和腰部尺寸为设计变量,以结构质量为经济性优化目标,以结构各构件应力比差的平方和为等强度优化目标,提出了经济性等强度优化设计方案,建立了优化目标函数,并采用APDL语言编制了相应的优化程序,利用基于共轭梯度法的一阶优化算法对优化目标函数进行了求解.优化计算结果表明,经济性优化设计方案侧重于节省钢材,等强度优化设计方案则侧重于结构的等可靠性,而经济性等强度优化设计方案既可以满足工程的经济性要求,又可以适当提高结构的整体安全性.
위료연구화해결대과월수전탑적우화설계문제,이결구절면、근개화요부척촌위설계변량,이결구질량위경제성우화목표,이결구각구건응력비차적평방화위등강도우화목표,제출료경제성등강도우화설계방안,건립료우화목표함수,병채용APDL어언편제료상응적우화정서,이용기우공액제도법적일계우화산법대우화목표함수진행료구해.우화계산결과표명,경제성우화설계방안측중우절성강재,등강도우화설계방안칙측중우결구적등가고성,이경제성등강도우화설계방안기가이만족공정적경제성요구,우가이괄당제고결구적정체안전성.
For the structural optimization of large-scale transmission towers, the dimensions of rods, bases and waists were regarded as the design variables, the structural mass was considered the objective of the economic optimization, and the quadratic sum of stress ratio differences of various structural components was regarded as the objective of equal-strength optimization. Accordingly, an equal-strength improved method based on the economic optimization model was proposed, and the relevant optimum objective function was established. The corresponding optimum program was compiled using the ANSYS parametric design language (APDL), and the optimum objective function was solved by the first order algorithm based on the conjugate gradient method. The calculated results indicate that the economic optimum design scheme highlights saving of steels, and the equal-strength optimum design scheme emphasizes the equal reliability of structures. The proposed equal-strength improved method based on the economic optimization model can satisfy the economic requirements of projects and improve the safety and reliability of structures.