Efficient Inter-process Communication in Parallel Implementation of Grid-Characteristic Method

Ivanov, Andrey M.; Хохлов, Н. И.

doi:10.1007/978-3-030-06228-6_9

Cited by 15 publications

(6 citation statements)

References 13 publications

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“…At this stage, we made all the calculations one after the other. Later on, the calculations will become faster with the help of parallelization, for example, using the MPI technology [20]. Figures 1, 2, 3 depict wave patterns of the seismic impulse spread (namely, the normal component of the stress tensor σ xx ).…”

Section: Resultsmentioning

confidence: 99%

Modeling Vertical Fractures Using the Schoenberg Model on Structured Grids by Grid-Characteristic Method

Stognii¹,

Хохлов²,

Petrov³

2019

RENSIT

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Seismiс prospecting is one of the most popular methods of revealing oil and gas reservoirs in the North seas. Geological media, which contain hydrocarbon layers, often include different heterogeneities, for example, fractures. Many scientific works are devoted to modelling fractures and ways of considering them in various mathematical problems, but the Linear Slip model, known as Schoenberg model of fracture, is still the most actual, though this model was developed at the end of the last century. This model is characterized by the presence of an additional parameterso called fracture opening parameter, describing fractures. In this work, we present the algorithm of introducing the Schoenberg fracture model in the grid-characteristic method. The fracture is organized to be parallel to the boundaries of the modelling grid. The fracture is situated on the border of the two media with the same characterizing parameters. We describe in detail the algorithm of computing the meanings of velocity and stress tensor in the points on the border with the fracture. In order to verify the correctness of the developed approach to modelling a fracture using the Schoeberg fracture model, we carry out the test calculations of sesmic waves spread in a homogeneous media with the vertical extremely thin fracture, described by the not equal to null normal component of the fracture opening coefficient and with the equal to null tangential component of the fracture opening coefficient.

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Section: Resultsmentioning

confidence: 99%

Modeling Vertical Fractures Using the Schoenberg Model on Structured Grids by Grid-Characteristic Method

Stognii¹,

Хохлов²,

Petrov³

2019

RENSIT

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“…At the contact boundaries between subdomains with structured and unstructured computational grids and subdomains with various parameters of the media, the contact condition of complete adhesion was used for system (1), (2): (7) and system 3, 4:…”

Section: Models and Methodsmentioning

confidence: 99%

“…The grid-characteristic method was proposed in [5]. Recently, new modifications of this method [6] and the corresponding computational algorithms for high-performance computer systems [7] are being developed. The grid-characteristic method has been successfully applied to solve direct [8][9][10] and inverse [11] seismic prospecting problems.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Seismic Resistance of Various Structures Using the Grid-Characteristic Method

Favorskaya¹,

Petrov²

2019

RENSIT

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Building in earthquake-prone regions requires the development of new methods for computer simulation in order to assess the safety of exploitation of constructed structures and design new structures. In this paper, we propose to use the grid-characteristic method on structured curvilinear grids to calculate the elastic and acoustic wave fields in the structure under consideration, containing the geological massif and surrounding water bodies. Then, based on the calculated field of the Cauchy stress tensor, the possible damaged regions are determined. To highlight the complex shape of the boundaries, multiple contacting separate computational grids are used, between which the contact condition of continuity of speed and traction is used. Test calculations of the earthquake resistance of a multi-story residential building, metro station, footbridge with elevator shaft and dam of hydroelectric power station were carried out. The used grid-characteristic method allows us to accurately solve the boundary-value problem of elastic and acoustic wave equations in the integration domain of complex shape.

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“…Для работы в системах с распределенной памятью программный комплекс распараллелен с использованием технологии MPI [16]. При распараллеливании использовались стандартные алгоритмы декомпозиции расчетной области и обмена приграничными ячейками, широко применяемые для явных сеточных методов [17][18][19][20]. Поскольку в данной реализации сеточно-характеристического решателя используются регулярные сетки, узлы могут храниться в 2D/3D массивах (в памяти они хранятся в виде непрерывных одномерных массивов).…”

Section: распараллеливание Mpiunclassified

Application of the grid-characteristic method for solving the problems of the propagation of dynamic wave disturbances in high-performance computing systems

Хохлов¹,

Petrov²

2019

Proceedings of ISP RAS

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Efficient Inter-process Communication in Parallel Implementation of Grid-Characteristic Method

Cited by 15 publications

References 13 publications

Modeling Vertical Fractures Using the Schoenberg Model on Structured Grids by Grid-Characteristic Method

Modeling Vertical Fractures Using the Schoenberg Model on Structured Grids by Grid-Characteristic Method

Calculation of Seismic Resistance of Various Structures Using the Grid-Characteristic Method

Application of the grid-characteristic method for solving the problems of the propagation of dynamic wave disturbances in high-performance computing systems

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