Vol. 9, no.2, 2017
РусскийEnglish
INFORMATION TECHNOLOGIES
NUMERICAL MODELING OF THE PROCESS OF DETECTION OF KARST CAVITIES IN RAILWAY EMBANKMENTS BY A GRID-CHARACTERISTIC METHOD
1Vladimir S. Egiyan, 1,2Alina V. Favorskaya, 1Aram A. Mkrtchyan, 1,2Igor B. Petrov, 1,2Nikolay I. Khokhlov, 1,2Vasiliy I. Golubev
1Moscow Institute of Physics and Technology, http://mipt.ru
Dolgoprudny, Moscow region 141700, Russian Federation
2Scientific Research Institute of System Development of RAS, https://www.niisi.ru
Moscow 117218, Russian Federation
vladimir.yeghiyan@phystech.edu, aleanera@yandex.ru, aramaram94@mail.ru, petrov@mipt.ru, k_h@inbox.ru, w.golubev@mail.ru
Abstract. Over the past 160 years, railways are one of the main elements of the top track structure throughout the world. They serve to direct the wheels when they move and directly perceive and transmit pressure to the underlying elements. Despite all the efforts of engineers, karst cavities can form under the rails due to severe operating conditions. One of the priority tasks is the development of methods for their detection in railway embankments by solving a series of direct problems. The purpose of this paper is to study the propagation of elastic waves in a railway embankment. We used a grid-characteristic method on curvilinear structural grids, which makes it possible to efficiently solve the tasks of monitoring the state of the railway embankment and paths, including taking into account the large number of integrity violations, to take into account the dynamic interactions in the system of rolling stock - the path, to obtain a complete wave pattern. A comparative analysis of calculations of a series of calculations with a variable geometry of the computational domain was carried out. Comparison of the propagation processes of elastic waves in the presence and absence of karst inclusions in the soil under the embankment is made, comparison of signals diagnosed in these cases from rails is given.
Keywords: computer simulation, grid-characteristic method, structural hexahedral grids, railway transport safety, karst cavities
UDC 519.63
Bibliography – 10 references
Received 14.11.2017
RENSIT, 2017, 9(1):215-220 DOI: 10.17725/rensit.2017.09.215
Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/219/9(2)215-220e.pdf