Russian Academy of Sciences
Far Eastern Branch
Special Research Bureau for
Automation of Marine Researches
25, Gorkiy str., Yuzhno-Sakhalinsk, 693023, Russia,
email: SKB-SAMI@sakhalin.ru
fax: +7 (424-2) 55-49-66
2002
Yuzhno-Sakhalinsk
Special Research Bureau Automation of Marine Researches is a state science-technical institute in the Far Eastern Branch of Russian Academy of Sciences.
Since 1972 SRB will carry out a complex of scientific researches, equipment design and serial manufacturing of modern devices and systems of supervision behind hydroacoustic and hydrophysical conditions by the sea. Hydrophysical ranges near to Levenorna cape on an island Sakhalin and in a settlement the Rybaky on an Iturup island will form a stationary line for hydroacoustic researches in a Southern part of the Okhotsk sea.
Nowadays in the engineering building joint Russian-American College "Sakhalin-Alaska" is open which conducts preparation of the experts for oil projects of development of a Sakhalin shelf.
Director of SRB, Anatoly E. Malashenko, +7 (424-2) 55-49-66
Head of Saint-Petersburg department, doctor Mikhail L. Krasny,
Science mate Alexander A. Taboyakov, 55-02-14
Head of Computational Fluid Mechanics & Oceanography lab, Vasily N.
Khramushin, 55-03-27
3D tensor mathematics for the computational fluid mechanics
Mathematical and computational simulation of tidal and flow in Okhotsk sea
Compute aided system for duty oceanologist of the tsunami warning service
Navigator’s on board compute systems for the oil-rig steadfast and stability
Onboard seakeeping computer system
Storm seakeeping researching agreed the hull form and the ship architecture
Information complex for analysis of operative hydrometeorological environment at the sea
Cartography inquiry-information system
Seismic-hydro-acoustic system for continuous monitoring and sea environment control
Seismic and hydrophysical stations and hydroacoustical line “Sakhalin-Iturup”
The computational fluid mechanics experiments by using of a digital computers is based on a finite differences schemes, which applied hydrodynamic values by nodes of computation grid and the distance between item points is impossible to admit as infinitesimal ones, so approximation of hydrodynamic fields of computational schemes are not smooth and not continuous.
Designing of mathematical methods at the beginning oriented for solution to the fluid mechanics of the finite differentials, allows not only to analyze correctly the differential approximations properties for differential equations, but it is the foundation for complex researches of fluid reology as well and it can be used for problem establishment and practical realization of fluid mechanics computational experiments.
The stratification of computational
processes by the physical parameters is set into the tensor definition of fluidmechanics
laws basis, when external forces and reactions summoned by them should be defined by
different tensor bases (coordinate systems). Invariants and eigenvectors of such the
tensor of connection between the bases define the internal reological properties of liquid
particle and the accumulation factors (closing) inside of the external energy. Principles
of the computational operations within the tensor area are fundamental laws of mechanics
which give strict description of the reological and dynamics flow properties.
In particular within the fluid flow area where the degeneration of II-range tensor basis, is taking place – practically might be observed the vortex, free surface separation or cavity. Respectively control of a conditionality of the matrix which is forming the tensor of the fluid properties might allow as to provide the authenticity of computational experiments, so to carry out a opportune transfer to particular problems or others including empirical patterns.
It is interesting that using formal tensor laws which are applied for “viscous compressible either” it is easy to determine the elementary particles including ones which take part in dynamics of intranuclear substance reciprocity; by the same positions to define thermal, electromagnetic, mechanical and gravitational fields and reciprocity principles of the physical objects.
The instrument for tensor laws construction might be used for computational processes design of evident (canonic) form that might provide the parallel computational processes till the each of a single fluid particle and also it sets conditions for automatic reconstruction of computational schemes possibility, depending on the current fluid mechanics or flow reology properties.
Okhotsk sea is a large half-closed water area, and it is unique region for a natural and computational researching for the tidal and flow processes.
The target of the current project is
creation of mathematical models and realization of oceanological computational experiments
which is capable to simulate the real tidal and flow conditions in the Okhotsk sea and
also to predict simulate off storm surge and tsunami.
Project goals to study the numerical scheme properties, to analyze the empirical dependencies which are characterizing the bottom friction, surface strains from storm winds and other dynamic and algorithmic particularities of computational simulation for tidal and flow. As results of the performance mathematical models and their program realizations would be created and tested in which peculiarities of the fluid mechanics processes simulation in the Okhotsk sea would be taken into account, and procedures and criterion for the direct numerical simulation of the tidal modes within other half-closed seas would be elaborated.
The project was supported by Russian Foundation for Basic Researches, grant ¹ 97.05.66037
The tsunami is dangerous sea
phenomena, which admits the possibility to organize the actions for the peopling
evacuation with the lead time from a few minutes to hours.
Fluid mechanics of tsunami shall be defined as high-frequency long wave process, the direct numerical simulation of which requests the large computational resources to meet the approximation criterion.
The current project solves the problem for complex researches of special information systems and computational experiments which have to be adapted for operative information receiving from coastal hydrometeorological stations observation and to carry out in full accordance to operational tsunami warning service regulations.
Sakhalin Tsunami Warning Center catalogues:
State and perspectives of
development for the Sakhalin operative tsunami warning service
Tatiana N. Ivelskaya, Director of Sakhalin Tsunami Warning Center
The project was supported by Russian Foundation for Basic Researches,
grant ¹ 97.01.96010.
(Kamchatka)
Drilling on the
Sakhalin shelf perform during the summer navigation. In autumn oil-rigs returning to south
area of the Okhotsk sea and while they are going over a sea they risk to come upon the
force of the hurricane storms. When the storm rolling the oilrig captain has an optimal
solving from contradict conditions between decreasing of upper deck flooding and
minimization of rolling and angle acceleration on rolling and pitching
It is proposed to automatize all the navigator’s calculations related with estimations of loading, stability, rolling and rolling parameters of the oilrig. Navigator’s computer must be connect with the data units of wind velocity and direction, data from compass and inclinometer. Such the computer unit will allow in automatic mode to control the seakeeping and safety conditions on the storm ways, and will allow in a short time to estimate different options for rig loading, which will be promoting for decreasing of the dangerous effect of the storm wind and clean breach.
The analogous work modes of the navigator’s computer should provide the steady of oilrig being on the ground, when during the oil production process the loading modes as alternate, that the static steady of the rig might be broken under the effects of stream, storm and waving.
The navigator’s information
computational complex should include a computer which will receive the information from
navigational instruments: compass, velocity log, echo depth sounder, gyro-compass, GPS and
data units of main engines, from a weather system the water and air temperature, wind
direction and velocity, wave height characteristics. In that case with the help of
computational algorithms for the proper rolling and ship stability parameters might be
identified using previous records of storm navigating mode; the recommendations about
maximum speed achievement methods, minimizing of rolling and other seakeeping
characteristics required by duty navigator would be elaborating.
Such work has the most important fundamental value for researching the seaworthiness problems will allow to rise the level of navigation convenience and security, will allow to enlarge the ship operation efficiency during the storm sailing.
Seakeeping of the ship is a researches depend on the really marine practice and on the human experience based on the captain’s solving for a different seagoing conditions. Project concludes the following three parts:
1. The analysis of the historical
decisions at designing the most seaworthy form of the case of the ship, comparison to
modern experience of navigation and seafaring.
2. Complex of analytical researches and computing experiments, which make a theoretical basis of designing by best on seaworthy qualities of the form of the case of the ship;
3. Complex of seaworthy tests in the towing basin, when for an estimation of critical modes of navigation, in common with the special prepared experimental model the tests of base models were carried out, on which in the world literature there are extensive items of information. In conclusion of experiments the tests of modes of safe navigation were executed, in which the model was tested on the supercritical for a traditional vessel regimes of sailing and safety of emergency swimming without a course.
The work requires recurrence of all computing experiments with use of modern computer facilities, and also which contain in detailed study of experimental records on paper carriers, speed up and calibrate curves, indications of accelerometer, gyro-horizon and wavegraphs, complex tests, received at performance in the towing basin.
By results of computing experiments and towing tests the qualitative conclusions about an opportunity of essential improvement of seaworthy qualities of the ship adapted to navigation in a storm condition were received thus, practically in all modes of storm navigation the new model showed the essential superiority over the existing projects of the form of the case of the ship.
§ 1. Technician-history analysis of ship seakeeping
(c)85-98, Vasily N. Khramushin, Saint-Petersburg - Yuzhno-Sakhalinsk
The performance of
the current project is necessary for technical improvement of the tool facilities using in
the Sea Department, hydro-forecast services and in the Tsunami Warning Center of the
Sakhalin Hydrometeorology service.
The topicality of project is specified by the point that present services carry out using obsolete paper technologies which it is impossible to use for efficient solution to the operative problems related with the sea environment control.
During automation process of the routing tasks in sea departments of the Sakhalin Weather Service the formats of data and operative information should be developed which at further time might be used at performance the oceanological researches involving international projects.
Many scientific
researches on Sakhalin restrain by absence of the authentic information about a current
condition of an environment and impossibility of use of materials of researches of the
last years, which for a long time were not systematized and did not adapt under a modern
method of the analysis scientific information.
The purpose of the given project is the performance of large volume of routine works on "restoration" of archives of scientific researches and materials of supervision behind a condition of the sea and environment executed per the last years. The beginning of works on the given theme does not suffer delaying, as to destruction of Sakhalin scientific collectives there is an irrevocable loss of materials of scientific researches.
Sakhalin
shelf is the extremely complicated for developing one and that is conditioned by strong
currents, heavy wave environment during the winter period and also by ecological
defenselessness of south nature. For the purpose of provide the secure carrying out the
oil processing within the shelf especially during the winter period and the autumn-spring
gales periods and also for carrying out the continuous ecological control should be
carried out the continuous operative monitoring of hydro-physical parameters (periodicity
and intensity of the surface and deep water waves, ice fields dynamics, currents, shelf
waves and storm surge, and ecological parameters of sea conditions (presence of the
hydrocarbons and other admixtures, dynamics of their propagation). One of the most
efficient methods for such a control is the seismic-hydroacoustical tomography.
In practice such a system might be generated using three ground hydroacoustical transceivers which shall interchange by acoustical impulses on specified frequency and echo signal duration. Using measurement of the intensity and transition time of the direct and reflected signals and also the mathematical processing of the frequency conditions exchanges for acoustic sending (echo and reverberation) it possible to discover the Doppler's and the three-dimensional field design for current velocity and to display and register the suspended admixtures.
If the large volume of information from hydroacoustic data units is receiving to the drilling platforms of shore observing station so in that case it is possible to organize the complex observation for the sea environment conditions when the system would either provide environmental conditions observation, so the marine hazard events warning. In this case the cable station shall be provided by additional recording devices like the three component seismographs and sounders for the transsonic speed, pressure and temperature, etc.
Using autonomic mode the hydroacoustical monitoring data should be writing to internal memory of the measuring devices, it that case it is possible to perform works for standard recording of the current fields, thickness and moving speed of ice fields and other measurements including the traditional hydrophysical data units utilization.
The seismic submarine
acoustical and hydro-physical researches on the station near Levenorn cape of the Sakhalin
island carry out from 1973 year and include long-term observations for the hydro-acoustic
environment which are performing using the offshore transceiving complexes and the complex
trails by regular using the scientific researching navy. The station of the Iturup island
commissioned in 1986 year and from that time were started the regular experimental
researches on the long (340 km) submarine acoustical routing Sakhalin island – Iturup
island. The hydro-acoustical and hydro-physical investigations use unique equipment
including ones developed by the SRB.
Both the stations might be involved like the experimental grounds for seismic, hydro-physical, submarine acoustical and hydro-biological researches. Taking into account the geographical location of the underwater acoustic routing conditioned by the high seismic and hydro-meteorological activity and by the presence of ice fields during winter seasons, the route might to cultivate the most interesting for world sciences testing area.
In particular there are experiences for creations of the Levenorn Cape experimental base for the ecological researches, for using the available there submarine acoustical station like a testing area for seismic underwater acoustic investigations for the purpose to study the seismic activity and early tsunami warning. In the design and industrial departments of the SRB developed, tested and commissioned a number of generations for autonomous ground submarine acoustic systems which might be using for the purpose of continuous monitoring both at the available stations and at the other sea areas of Sakhalin Region.
By the SRB were collected large volumes of archive records in analog type on the paper and magnetic storage medium and the contemporary processing of them will allow to retrieve the long-term dynamics of the hydro-physical and hydro-meteorological events unsteadiness in Okhotsk sea south part, to design the identification indications of the earthquake, tsunami and animal migration (seal, cetaceous, crabs). Those materials have to provide the involving of the SRB submarine acoustical routing into the international programs like ATOC and to extend investigations with outlet to the Pacific area of the Kurile islands.
The fine structure of the spectral maxima of variations of sea level, air pressure and air temperature for periods from several days to several months
(c)98, E.V. Ivanova, Moscow State University, Moscow, Russia, V.V.Ivanov, Institute of Marine Geology & Geophysics, Yuzhno-Sakhalinsk, Russia.