کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7374534 1480062 2018 34 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Vibration and instability analysis of flow-conveying carbon nanotubes in the presence of material uncertainties
ترجمه فارسی عنوان
تجزیه و تحلیل لرزش و بی ثباتی نانولوله های کربنی جریان انتقال در حضور عدم قطعیت مواد
کلمات کلیدی
نانولوله کربنی، جریان انتقال، لرزش، بی ثباتی، نا معلوم،
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
چکیده انگلیسی
This paper aims to present an interval analysis method to reveal the vibration and instability behaviors of flow-conveying CNTs under uncertain material properties. Based on the nonlocal Timoshenko beam theory, the governing equation of a flow-conveying CNT surrounded by a Pasternak-type elastic medium is derived. Firstly, the deterministic parametric analysis is performed to highlight the influence of the material properties on the critical flow velocity and fundamental frequency of the system. Then, these material parameters are all defined as uncertain-but-bounded variables, and the critical flow velocity and the upper and lower bounds of the fundamental frequency of the system are examined correspondingly by using the surrogate model-based interval analysis method. Finally, the effects of elastic medium, nonlocal coefficient and uncertain level on the critical flow velocity and bounds of the fundamental frequency are discussed in detail. In addition, the verification of the proposed method is confirmed by probabilistic method and Monte Carlo simulation. Conclusions obtained in this paper can provide helpful guidelines for the precise control of the flow-conveying CNTs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 511, 1 December 2018, Pages 85-103
نویسندگان
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