Sokolov A.,Krylov State Research Center
INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control | Year: 2014
One of the main hydraulic elements to reduce noise and vibration of pipelines is a rubber-cord hose, which consists of a composite shell and attachment flanges. Within the frames of a beam model dynamic behavior of pipeline elements is described with impedance matrix 14x14, which can be determined by calculation or experiment. In the current paper a theoretical beam model of fluid-filled hose is introduced, taking into account with orthotropic and viscoelastic properties of composite shell. Expressions for impedance matrix elements are presented in analytical form. Some elements are measured and good agreement between predicted and measured characteristics is shown.
Pyshin A.,Krylov State Research Center
20th International Congress on Sound and Vibration 2013, ICSV 2013 | Year: 2013
In hermetically closed compartments of navy ships there is a fire-fighting system. As a rule this system works on the principle of chemical Volumetric influence on burning points. The flame arrester works as retarding agent of burning reaction up to its full stopping. Freon is used as stopping agent or fire inhibitor. This method is quite effective. It guarantees extinguishing at any stage of burning process during 60 seconds at normal atmospheric pressure. Unfortunately this method is very dangerous for ship crew and demands special breathing apparatus. The new crew safety method of fire-fighting with the same effectiveness is based on reduetion of oxygen concentration in closed compartment by addition of large quantity of nitrogen. This system does not required special breathing apparatus. Highly compressed nitrogen rapidly comes into compartment through few sprayers. Extremely high level noise accompanies this process. Sound level exceeds 140 dB. The construetion of new sprayer was proposed. Noise of gas jet was reduced up to 30 dB.
Valdman N.A.,Krylov State Research Center
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE | Year: 2013
The results of conceptual design of safety system elements for exploitation of offshore platforms, off-loading berths and terminals of liquid hydrocarbon in the Russian shelf seas are considered in the paper. The methodical approaches used at substantiation of technical decisions on storage, offloading and liquid hydrocarbon transportation on objects of marine transport-technological systems (MTTS) are presented. The results of development of both a complex of measures on decrease of accident risk and using of safety criteria and factors are given. Copyright © 2013 by ASME.
Krasnov I.P.,Krylov State Research Center
Proceedings of the International Conference Days on Diffraction 2013, DD 2013 | Year: 2013
Peculiar solutions examined herein are characterized by the fact that vectors corresponding to them and describing electromagnetic field are equal to zero in free space points, i.e. beyond restricted area V, occupied with a substance, at the same time electromagnetic potentials of the field are different from zero within the whole space. The paper demonstrates that Maxwell equation solutions will be peculiar if electric current density j, polarization P and magnetization J considered as electromagnetic field sources represent gradients of smooth finite functions in V domain, and also that variation of sources values in time instantly transferred to the field vectors, without delaying. © 2013 IEEE.
Korableva M.S.,Krylov State Research Center
Proceedings of the International Offshore and Polar Engineering Conference | Year: 2013
Methods of profit approach are referred to the methods most often used during evaluation and economic analysis of intangible assets, which are the design works of the ocean engineering facilities (OEF). Concerning general applicability of profit methods the analyst also should keep in mind that these methods can be adapted with reference to majority of categories or kinds of intangible assets. While methods of market driven approach and profit approach possess specific conditions of applicability to certain categories of intangible assets and intellectual property, the methods of profit approach as a whole can be used concerning practically all categories of these assets. This paper is devoted to application of profit approach for the cost estimation of the ocean engineering facilities design works. Example of the cost estimation for SPAR-platform design works by the method of discounting the costs saving of profit approach is performed in the paper. Copyright © 2013 by the International Society of Offshore and Polar Engineers (ISOPE).