On the Combined Asymptotic-Tolerance Modelling of Dynamic Problems for Thin Biperiodic Cylindrical Shells
2018
artykuł naukowy
angielski
- micro-periodic cylindrical shells
- dynamics
- tolerance modelling
- length-scale effect
EN The objects of consideration are thin linearly elastic Kirchhoff-Love-type circular cylindrical shells having a periodically microheterogeneous structure in circumferential and axial directions (biperiodic shells). The aim of this contribution is to formulate and discuss a new averaged general asymptotic-tolerance model for the analysis of selected dynamic problems for the shells under consideration. This model is derived by applying the combined modelling which includes two techniques: the asymptotic modelling procedure and a certain extended version of the known tolerance non-asymptotic modelling technique based on a new notion of weakly slowly-varying function. Contrary to the starting exact shell equations with highly oscillating, non-continuous and periodic coefficients, governing equations of the averaged combined model have constant coefficients depending also on a cell size. The differences between the general combined model proposed here and the corresponding known standard combined model derived by means of the more restrictive concept of slowly-varying functions are discussed.
2018020-1 - 2018020-9
CC BY (uznanie autorstwa)
publiczny
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