کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
297596 511762 2011 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimal design of the positions of the hoops for a hydraulic pipelines system
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Optimal design of the positions of the hoops for a hydraulic pipelines system
چکیده انگلیسی

This paper focuses on decreasing the vibration and improving the dynamics performances for a hydraulic pipelines system. The parametric model of the hydraulic pipelines system under the random excitations is constructed and the dynamics characteristics are obtained by the finite element analysis, then an optimization model is presented to reduce the vibration by rationally designing the positions of the hoops in the pipelines system. The dimensions determining the locations of the hoops are defined as design variables, and the dynamics performances, such as the maximum displacement, the maximum axial stress, the maximum shear stress, the maximum axial strain, the maximum hoop strain, the maximum shear strain and the failure probability of the first passage are regarded as nonlinear constraints whereas the failure probability of cumulative fatigue damage is viewed as an optimization objective. The results show that the dynamics performances of the hydraulic pipelines system are distinctly improved by the optimization procedure, such as, the maximum displacement and velocity are reduced by 67.5% and 58.6%, respectively, and the maximum axial stress and strain are both decreased by 61.5% while the maximum shear stress and strain are reduced by 66.1%, and the failure probability of the first passage and cumulative fatigue damage are allayed by more than 99%, etc.


► The parametric model of the hydraulic pipelines system is constructed by ANASYS.
► The above parametric model can be called by MATLAB.
► An optimization model for the positions of the hoops is established.
► An optimization for the positions of the hoops is performed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Design - Volume 241, Issue 12, December 2011, Pages 4840–4855
نویسندگان
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