Is considered non-stationary axisymmetric problem for fine round bimorph plate under the action of the top end surface of the normal stresses, being an arbitrary function of radial coordi-nates and time. On the basis of the theory of Tymoshenko by the method of finite integral transformations built a a new solution for the electroelasticity system stepwise  variable thickness and stiffness. The obtained relations allow to investigate the stress-strain state and the potential difference between external electrodes bimorph elements.  

Keywords: task reverse piezoelectric effect, thin bimorph plate, axially symmetric dynamic load

Information about authors of issue №4 (2013)

Keywords: authors

Article is devoted to aspects of management, aimed at investigating the nature of organizational conflict in order to identify the causes and possible management. Relevance of the topic emphasized by the fact that the study of conflict, its causes, and the methods and means of management emerged relatively recently and now, when the Russian economy is going through a stage of radical reform, this aspect of management is of interest for many researchers. Since the conflict in terms of joint activities of people are able to reduce labor productivity, it is necessary as soon as possible to anticipate. Particularly noteworthy are the management of organizational conflicts, as in the current economic development organization is a key participant in the economic relations and the conflicts that arise in this subject in need of early detection and effective management.

Keywords: organizational conflict resolution, management, conflict management, the concept

The article is devoted to the resistance accounts composite structures. The basis of the position of women variational energy principle. Considered potential energy flanging to calculate the stress-strain state of construction, consisting of a base of the form of hexagonal plates, rigidly connected to the base of circular cylindrical shells, the upper end of which is enhanced by the hexagonal crimping.

Keywords: plate, shell, variation-energy principle, the strength, the composite structure

The article is devoted to the resistance accounts composite structures. We consider the output resolution of the system of equations for determining the stress-strain state of construction, consisting of a base in the form of hexagonal plates, rigidly connected to the base of a circular cylindrical shell.

Keywords: plate, shell, the strength, the composite structure.

The article is devoted to the resistance accounts composite structures. Examine the work of the external forces acting on the structure, consisting of a base in the form of hexagonal plates, rigidly connected to the base of a circular cylindrical shell.

Keywords: plate, shell, the strength, the composite structure.

Method of successive approximations was used to solve the problem of optimization of multispan continuous beam. Cross section of a beam was a welded I-beam.  By the variation of the width of the shelf we ensured that the maximum equivalent stress for energy theory of strength in each section is the same throughout. The solution is made numerically using complex MatLab. Bearing capacity of beams with variable stiffness along the length increased in 2 times in comparison with the beam with constant stiffness and the same mass. The proposed method can be applied to frames, taking into account the contribution of longitudinal forces in the equal stresses. Another effective way to change stiffness is to change the height of the wall of I-beam. In practice curvilinear shape of beams or shelves are not used because of complexity of manufacturing. They are replaced by the discrete form of cross section.

Keywords: multispan beams, work method, optimization, uniform strength, welded I-beam, variable stiffness

The article gets application multi-element piezoelectric transducers for ultrasonic high-speed flaw  detection on railway tracks. The processing algorithm of echo-signals from multi-element piezoelectric transducers was offered to get additional information about defect location to apply solution considering risk level more validly and to increase crack detection probability. The obtained algorithm was realized as software package. A set of experiments was completed for fourth-elements inclined piezoelectric transducer on a standard pattern for various positions to verify the processing algorithm. The experiment has shown that the echo-signals behavior allows to use the obtained algorithm for multi-element transducers at the high-speed flaw detection. Also it has emerged that the echo-signal shape at one element of piezoelectric transducer strongly depends on refracting prism geometry and relation position elements on prism.

Keywords: multielement piezoelectric transducers; ultrasonic methods; echo-signal; high-speed flaw detection

To study complex sonar systems, the method of decomposition was suggested. The peculiarities of the method applied to the sonar systems were considered. A four-level hierarchy of decomposition subsystems is proposed. A scheme of the first level of semantic decomposition was presented. Controlled modules allowed to build adaptive systems were described.

Keywords: decomposition, hydro speaker systems, hierarchy of subsystems

  Mediation as a modern legal option of the conflict’s resolving is a complex phenomenon in the system of the legal practice. Contemporary conflicts mostly arise in the circumstances when they face a qualitatively different understanding of law and order, maintenance of law and mechanism of its realization, which requires a search of the psychological mechanisms to ensure the human security. It is necessary in mediation procedures application process, which helps to make a mutually acceptable decision, to achieve a psychological orientation on the decision’s search for and preservation of normal relations in the future.

Keywords: Сonciliations, mediation, psychology, security, the causes of conflicts

  Now nanotechnologies are one of perspective methods of diagnostics in medical practice. Nanoparticles can be used as contrast agents for medical ultrasonic introscopy due to their adhesion to tumor cells and bacteria. The mathematical model of the laser excitation of acoustic signals in a liquid medium with the presence of the nanotubes was developed and numerically studied. Increasing of the level of photo acoustic signal was shown.

Keywords: Opt acoustic effect, nanotubes, and model

  This paper discusses the problem of controlling the characteristics of sonar multibeam receiver antennas. Hydro acoustic means, such as side-scan sonar, profiler, sonar, multibeam sonar, are used extensively for remote determination of the parameters of media for environmental management. In the article the technique of controlling the phase-frequency characteristics of the receiving antennas multibeam echoes sounders. The study method allows the measurement of the phase-frequency characteristics of antennas in a hydro acoustic tank which size is less than length of a near field of the reception aerial.

Keywords: Conservancy, multibeam echo-sounder, seabed research, underwater acoustic

In this paper a form of expression in the matrix to determine the unknown ratios in double rows, appoksimiruyuschih displacement of a point of the middle surface of the shell, which is used in calculating the shell variation-energy method  

Keywords: envelope variation-energy method, the minimum total potential energy of the system, movement, deformation.

  Analysis and evaluation of geological and hydrogeological risks is a special kind of design and survey activities aimed to provide public safety, economyfacilities and the environment within the areas exposed to dangerous geological and engineering-geological processes. The article deals withreduce environmental risksmeasures in case of dangerous geological processes. A variant of engineering-geological zoning of the urban area, depending on the state and properties of the geological environment.

Keywords: ecology, geology, risk

  Analysis and evaluation of geological and hydrogeological risks is a special kind of design and survey activities aimed to provide public safety, economyfacilities and the environment within the areas exposed to dangerous geological and engineering-geological processes. The article deals withreduce environmental risksmeasures in case of dangerous geological processes. A variant of engineering-geological zoning of the urban area, depending on the state and properties of the geological environment.

Keywords: ecology, geology, risk.