Three Different Methods for Approximate Analysis of Bar Structures

سال انتشار: 1399
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 369

فایل این مقاله در 8 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

JR_IJE-33-1_006

تاریخ نمایه سازی: 25 خرداد 1399

چکیده مقاله:

In this paper, modified solutions were compared through utilizing three different approximate methods for bar structures. The modifications considered various changes in the initial design. To authors best of knowledge, the studies have carried out on this matter so far are not broad enough and have considerred the simeltaneous variations of size, geometry and topology on the bar structures. In this study, three well-known methods, including combined approximation, rational approximation and the approximate inversion of stiffness matrix methods are formulated. A large variety of problems will be performed with different characteristics to compare the ability of these approaches in determining the suitable approximate modified displacements. Cross sectional properties and nodal coordinates are considered as design variables. Displacement errors and computational efforts of the processes considered as comparison factors. It is shown that the approximate inversion of the stiffness matrix method cannot solve the problems, which requires the modification of structural geometry. Furthermore, the combined approximation and rational approximation methods have the ability of reaching displacements with suitable quality in the problems with a moderate size.

نویسندگان

M. Rezaiee-Pajand

Department of Civil Engineering, Ferdowsi University of Mashhad, Iran

Mehran Momenipour

Department of Civil Engineering, Toos Institute of Higher Education, Mashhad, Iran

Seyed Mojtaba Hozhabrossadati

Department of Civil Engineering, Toos Institute of Higher Education, Mashhad, Iran