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Математическое моделирование динамики тоннелей и трубопроводов мелкого заложения

Математическое моделирование динамики тоннелей и трубопроводов мелкого заложения

Abstract

Рассматривается модельная транспортная задача динамики упругого полупространства с цилиндрической полостью, подкрепленной упругой цилиндрической оболочкой, ось которой параллельна границе полупространства, при действии транспортной нагрузки, движущейся вдоль тоннеля с постоянной скоростью. На основе метода неполного разделения переменных получено аналитическое решение задачи при дозвуковых и сверхзвуковых скоростях движения транспортной нагрузки и проведена его программная реализация в дозвуковом случае. Проведены численные эксперименты по определению напряженно-деформированного состояния упругой оболочки и окружающей среды при разных скоростях движения. Изучено влияние параметров оболочки, контактных условий и скорости движения на напряженно-деформированное состояние массива и свободной поверхности. Проведен анализ дисперсионных кривых для случаев скользящего и жесткого контактов оболочки с окружающей средой, определена критическая скорость движения нагрузки, при которой в тоннелях возникают резонансные явления.

The model transport problem of the dynamics of an elastic half-space with a cylindrical cavity is considered. Along the cavity, which is supported by an elastic cylindrical shell, the transport load is moving with constant velocity. Using the method of incomplete division of variables, analytical solutions are obtained for subsonic and supersonic velocities of the transport loads and its computer realization is carried out for the subsonic case. The stressed-strained state of an elastic shell and of the surrounding medium for various motion velocities is determined using numerical experiments. The effect of the parameters of the shell, of the contact conditions and velocities of the motion on the stressed-strained state of the array and the free surface is studied. The dispersion curves are analyzed for the cases of slipping and strong contact of the shell with the surrounding medium; the critical velocity of the displacement of the load, for which the resonance phenomena in tunnels appear, is determined.

Keywords

ТОННЕЛЬ, УПРУГОСТЬ, ОБОЛОЧКА, УПРУГОЕ ПОЛУПРОСТРАНСТВО, ТРАНСПОРТНАЯ НАГРУЗКА, ЧИСЛА МАХА, ПОТЕНЦИАЛЫ ЛАМЕ, РЯДЫ ФУРЬЕ, ИНТЕГРАЛЫ ФУРЬЕ, MACH''S NUMBERS

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selected citations
These citations are derived from selected sources.
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
bronze