کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6714941 1428738 2018 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An explicit periodic nonlinear model for evaluating dynamic response of damaged slab track involving material nonlinearity of damage in high speed railway
ترجمه فارسی عنوان
یک مدل غیر خطی صحیح دوره ای برای ارزیابی پاسخ دینامیکی ریل های آسیب دیده، شامل ناپایداری مواد آسیب در راه آهن های با سرعت بالا
کلمات کلیدی
راه آهن با سرعت بالا، رد اسلب، خسارت، روش طیفی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
For evaluating the vibration response of the damaged slab track efficiently, a novel explicit periodic nonlinear model for the damaged slab track in high speed railway involving material nonlinearity of damage is presented based on the theory of continuum damage mechanics and the constitutive relationship of concrete under uniaxial tension, where the infinite periodically supported composite beam for the track on the elastic foundation is truncated into a beam section with the length of a single vehicle by introducing periodic boundary conditions. The vibration equations of the nonlinear model are discretized into ordinary differential equations (ODEs) in space domain by the periodic spectral method, and then by applying the explicit central difference method these ODEs are solved with time-domain difference ultimately. The validity of the model is verified by the comparison of the results from the periodic model, finite element method (FEM) and the field test, and the reasonable values of the key computational parameters are recommended. Moreover, the influence of track structural parameters on the vibration response and damage evolution of CRTS II slab track of China's high speed railway is investigated with the periodic nonlinear model. And some practical conclusions for design and construction are acquired.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 168, 20 April 2018, Pages 606-621
نویسندگان
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