Formation of Thermocline in the Equatorial Zone of the Oceans

Boguslavskii, S. G.; Kuznetsov, A. S.; Boguslavskii, A. S.; Ivashchenko, I. K.

doi:10.1007/s11110-005-0020-7

Cited by 4 publications

(4 citation statements)

References 1 publication

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“…To account for rigidity diagonal rod elements must be introduced for the shift of the side rod panels of model hexagons (Fig. 2, b is not shown), the parameters of which, at the choice of the calculator, are accepted according to the recommendations [22] given in Table. N q a b = + ( ) ( )…”

Section: The Core Interpretation Of the Continuous Shells Of The Port...mentioning

confidence: 99%

The KPP 16/32t transshipment crane finite element model for transshipment of goods in river and sea ports

Dulger,

Korablin

2023

Vestnik of Astrakhan State Technical University. Series: Marine Engineering and Technologies

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Transshipment cranes of the checkpoint of the Lenpodyemtransmash plant are widely used in river and sea ports, at industrial enterprises for grappling transshipment of bulk cargo and for working with piece loads or containers, as well as for transshipment of scrap metal and rolled metal using lifting electromagnets. It is proposed to eliminate the uncertainties caused by the incompatibility of one-dimensional (rod) and two-dimensional (plate) finite elements having a different number of degrees of freedom, 12 and 20, when developing digital twins of portal cranes of the Lenpodyemtransmash plant on the example of the CHECKPOINT 16/32t crane by approximating axisymmetric shells of the portal head with rod finite elements. The method is based on the equality of the potential shear energy of the finite element model of the plate and the potential energy of the approximating rod model, the elements of which work on tension/compression, which made it possible to move from the finite element model of the GEARBOX 16/32t reloading crane, built on the basic finite elements of Kirchhoff plates, to the finite element model of the crane based on the core base finite elements. A mathematical model of a matrix equation of static equilibrium with many degrees of freedom is proposed, the numerical solution of which by the Gauss method allows us to proceed to six-component internal forces in each finite element due to the corresponding vector of external loads reduced to the degrees of freedom of the calculated finite element model. The possibility of inter-pretation of bearing elements of spatial metal structures of portal cranes by both one-dimensional rod and two-dimensional plate finite elements is investigated, a re-evaluation of traditional views on the computational analysis of the stress-strain state of metal structures of portal cranes in the field of reliable determination of their bearing capacity during operation in ports, especially in the field of assessing post-repair risk analysis and the resource of reloading cranes is proposed, those who have completed the standard service life in the port and have undergone capital repairs. A calculated rod finite element idealized model of a PPC 16/32t gantry crane for transshipment of cargo in river and sea ports is constructed, demonstrating the transition from a real design to a calculation model based on geometric principles of discretization of both rod and continuum elements by the basic rod end elements of the crane, as a result of which the digital calculation model should be detailed and complex, like a system with many degrees of freedom. The algorithm of application of the digital calculation model of the crane is given on the example of static finite element calculation analysis of the KPP 16/32t crane.

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Section: The Core Interpretation Of the Continuous Shells Of The Port...mentioning

confidence: 99%

The KPP 16/32t transshipment crane finite element model for transshipment of goods in river and sea ports

Dulger,

Korablin

2023

Vestnik of Astrakhan State Technical University. Series: Marine Engineering and Technologies

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“…There are three major theories regarding the mechanism of ultrasonic atomization: (1) a theory based on cavitation phenomena, 13) (2) a theory based on surface acoustic waves called capillary waves, 14,15) and (3) a theory that is a combination of the first and second theories. 16) However, there is still no conclusive evidence of which mechanism is responsible for atomization.…”

Section: Introductionmentioning

confidence: 99%

Relation between thresholds of free radical generation and atomization under ultrasound exposure

Aikawa

Kudo

2021

Jpn. J. Appl. Phys.

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The relationship between thresholds of free radical generation and atomization under ultrasound exposure was investigated to elucidate the mechanisms of ultrasonic atomization. In the experiments to gradually increase the transducer driving voltage, the free radical generation, a quick transition of the water surface shape from a protuberance to a fountain, and atomization had the same threshold. The experiments using the acoustic loading conditions with the different water surface shapes also confirmed this fact. Furthermore, a focused shadowgram of the ultrasound field taken using a small container that mimics the protuberance visualized the generation of spotty-shaped high-intensity nodes inside and near the boundary of the protuberance. These results indicate that the induction of cavitation promoted by the high-intensity nodes triggers the appearance of the fountain that leads to the creation of atomization.

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“…18) Water particles generated by ultrasonic atomization are very fine, and they can raise humidity quickly without wetting the work field. [19][20][21][22] However, the amount of saturated water vapor in the air is changed by the temperature (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Utilization of ultrasonic atomization for dust control in underground mining

Okawa

Nishi

Kawamura

et al. 2017

Jpn. J. Appl. Phys.

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This study examined dust suppression using water particles generated by ultrasonic atomization (2.4 MHz) at low temperature (10 °C). Green tuff (4 µm), green tuff (6 µm), kaolin, and silica were used as dust samples. Even though ultrasonic atomization makes fine water particles, raising relative air humidity immediately was difficult at low temperature. However, remaining water particles that did not change to water vapor contributed to suppression of dust dispersion. Additionally, the effect of water vapor amount (absolute humidity) and water particles generated by ultrasonic atomization on the amount of dust dispersion was investigated using experimental data at temperatures of 10, 20, and 30 °C. Utilization of ultrasound atomization at low temperature has the advantages of low humidity increments in the working space and water particles remaining stable even with low relative air humidity.

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Formation of Thermocline in the Equatorial Zone of the Oceans

Cited by 4 publications

References 1 publication

The KPP 16/32t transshipment crane finite element model for transshipment of goods in river and sea ports

The KPP 16/32t transshipment crane finite element model for transshipment of goods in river and sea ports

Relation between thresholds of free radical generation and atomization under ultrasound exposure

Utilization of ultrasonic atomization for dust control in underground mining

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