Numerical simulation of wave processes in elastic-acoustic problems using discontinuous Galerkin method on triangle unstructured meshes
Wave propagation through coupled elastic-acoustic media for marine seismology, comparison of reflected waves in fluid-filled and infinite thin crack model and underwater objects detection are simulated using discontinuous Galerkin method on triangle unstructured meshes.
1. Ландау Л. Д., Лифшиц Е. М. Теоретическая физика. М., 1987. Т. 7.
2. Käser M., Dumbser M. Highly. Accurate discontinuous Galerkin method for complex interfaces between solids and moving fluids...
Numerical solution of elastic-acoustic problems with the help of grid-characteristic method
Wave processes in elastic-acoustic problems are simulated with the help of grid-characteristic method, in particular, for the offshore seismic prospecting. We consider systems of water-soil-hydrocarbon-bearing layer and ice-water-soil-hydrocarbon-bearing layer
1. Etter P. C. Underwater acoustic modelling and simulation. L., 2003.
2. Куликовский А. Г., Погорелов Н. В., Семенов А. Ю. Математические вопросы численного решения гиперболических...
On Fire. Dissertation for the Master’s Degree. Translation from the Latin into Russian, Preface and Notes by S. V. Lugovoy
The text of Kant’s first dissertation is a translation from Latin from an academic publication of a collection of Kant’s works: Kant, I. Meditationum quarundam de igne succincta delineatio... In: Königlich Preußischen Akademie der Wissenschaften, ed., 1910. Kants Gesammelte Schriften. 1. Abhandling: Werke. Band I: Vorkritische Schriften I, 1747-1756. Berlin: Georg Reimer, 1910, pp. 369-384. The publication is available at https://korpora.zim.uni-duisburg- essen.de/kant/aa01/ [Accessed 10 March...
Joint modeling of elastic and acoustic waves in the Arctic
Numerical solutions of seismic prospecting problems in the Arctic is presented. Results of numerical modeling of the explosive impact on the iceberg and earthquake impact on the oil storage are considered as well. The complete system of equations describing the state elastic body and a system of equations describing the acoustic field are solved using grid-characteristic method, the contact condition between the liquid and the solid is used on the border
1. Etter P. C. Underwater acoustic modelling...
The image of Russia as a result of a political conjuncture, or The Metamorphosis of Abbé de Pradt
The focus of the article, written within the framework of the imagological approach, is the reconstruction of the image of Russia in France during the years of the Restoration. The article is based on the analysis of the views of the famous French diplomat and politician Abbé D. de Pradt (1759–1837). The relationship between the image of Russia in France and the current political situation is revealed by the example of the journalistic works of Abbé de Pradt. The article sees Russophobia as a...
Kant’s Dissertation for the Master’s Degree On Fire and the Transformations of his Ideas of Ethereal Matter
Kant’s dissertation for the Master’s degree Succinct Exposition of Some Meditations on Fire was written in Latin in 1755 as a sample (specimen) preceding a Master’s exam, but its first printing did not appear until 1838. What is the relevance of this Master’s dissertation for historical and philosophical studies? To answer this question I analyse the structure and give a brief summary of the dissertation, look at the history of its writing and try to identify the place of this work among...
Numerical modeling of wave processes in 3D fractured media
Seismic response from the cluster of vertical oriented cracks is simulated using grid-characteristic method on parallelepiped structured meshes. Synthetic seismograms and wave fields are calculated. The structure of the response including dependency on type of saturator (gas, fluid) is analyzed. Numerical experiments showed the effect of high-frequency daisy-chain wave’s generation from 3D periodic structures.
1. Волож Ю. А., Дмитриевский А. Н., Леонов Ю. Г. и др...
Body elastic impact about oblique surface
The restoration factor is experimentally defined at blow of ball about a motionless oblique surface. It is shown that the restoration factor is function of an angle of slope.
1. Великанов Н. Л., Наумов В. А., Примак Л. В. и др. Совершенствование предпроектных расчетов по ударному разрушению строительных конструкций // Механизация строительства. 2011. № 9. С. 29—32...