کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5469199 1519226 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analytical solutions for fixed-free beam dynamics in thin rib machining
ترجمه فارسی عنوان
راه حل های تحلیلی برای دینامیک پرتوهای ثابت بدون محدودیت در ماشینکاری
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی
Two different analytical approaches for predicting thin rib, fixed-free beam dynamics with varying geometries are presented. The first approach uses the Rayleigh method to determine the effective mass for the fundamental bending mode of the stepped thickness beams and Castigliano's theorem to calculate the stiffness both at the beam's free end and at the change in thickness. The second method uses receptance coupling substructure analysis (RCSA) to predict the beam receptances (or frequency response functions) at the same two locations by rigidly connecting receptances that describe the individual stepped beam sections, where the receptances are derived from the Timoshenko beam model. Comparisons with finite element calculations are completed to verify the two techniques. It is observed that the RCSA predictions agree more closely with finite element results. Experiments are also performed, where the stepped beam thickness is changed by multiple machining passes, and receptance measurements are carried out between passes. The RCSA predictions are compared to experimental results for natural frequency and stiffness. Agreement in natural frequency to within a few percent is reported.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Manufacturing Processes - Volume 30, December 2017, Pages 41-50
نویسندگان
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