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Продольные волны деформации в нелинейно ÑƒÐ¿Ñ€ÑƒÐ³Ð¸Ñ Ð²Ð¾Ð»Ð½Ð¾Ð²Ð¾Ð´Ð°Ñ

выпускная квалификационная работа магистра

Продольные волны деформации в нелинейно ÑƒÐ¿Ñ€ÑƒÐ³Ð¸Ñ Ð²Ð¾Ð»Ð½Ð¾Ð²Ð¾Ð´Ð°Ñ

Abstract

Выведены две новые асимптотические модели типа Буссинеска, описывающие длинные нелинейные продольные волны деформации в стержнях круглого сечения. Эти модели обобщены на случай ненулевой осесимметричной нагрузки на боковой поверхности, а также на случай предварительно растянутого стержня. Проведено сравнение дисперсионных свойств и солитонных решений новых моделей с моделями, полученными в прежних работах. Применён псевдоспектральный метод для численного моделирования полных трёхмерных уравнений, описывающих динамику нелинейно упругого стержня. Проведена серия численных экспериментов по возбуждению и сравнению солитонов в рамках модели типа Буссинеска и полной трёхмерной модели.

Two new Boussinesq-type models describing long nonlinear longitudinal strain waves in elastic rods of circular cross section derived. These models extended to include axially symmetric loading on the lateral surface and longitudinal pre-stretch. The dispersive properties and solitary wave solutions of these models compared with the ones of existing models. A pseudospectral method applied to perform numerical simulation of the full three-dimensional equations of motion in nonlinearly elastic rod. A series of numerical experiments is conducted in order to excite and compare solitons of Boussinesq-type model and the full model.

Keywords

Солитоны, Стержни, Численные методы, Упругости теория, псевдоспектральный метод, Волны нелинейные, модель типа буссинеска, объёмные волны деформации

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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