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Prototype investigations of dynamics of a triple-rib of a plane gate of the dam of the XXII Congress CPSU Volga Hes

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Hydrotechnical Construction Aims and scope

Conclusions

  1. 1.

    The frequency of free vibrations of ribbed gates in the air and the magnitude of the affected water mass when the gate is immersed in water are amenable to quite simple and sufficiently accurate calculations. For gates similar to those discussed it is permissible to determine ν0 as for a beam supported at the ends with shear deformation taken into account. It is recommended that the affected water mass be computed by Eq. (1) and a coefficient K=0.4.

  2. 2.

    Gates with clearly expressed ribbing (i. e., such in which almost the entire mass and rigidity are concentrated in several planes-planes of widely separated ribs connected with transverse ties of slanting type) are characterized by independent dynamic operation of the ribs as independent vibrating systems. The hypothesis of geometrically unchanging transverse ties is confirmed in static calculation: its application in dynamic computation when the determining role is played by inertial forces does not reflect the physics of the actual process. Having determined the natural frequencies of each of the ribs one can consider the average value as the natural frequency of the gate.

  3. 3.

    As a result of the investigation it was found that owing to the presence of a reverse relation between the pulsation of pressure and pulsation of the bar the system of the gate in water exhibits a tendency toward hydroelastic autovibration processes of natural frequency. Therefore, the determination of inherent vibration characteristics of the gate becomes of special importance in its design.

Because of its complexity, the mechanism of arising of autovibration is as yet not fully clear and investigations in this direction must continue.

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Literature Cited

  1. M. A. Rudyk, V. A. Palyunas, and P. E. Lysenko, On the design of plane high head, deep gates, Izv. AS i ASSR No. 4 (1962).

  2. A. S. Abelev, “Investigation of pulsation of hydrodynamic loads acting on gates of hydroaulic structures and development of some practical means of combating gate vibration”, Trudy Koordinatsionnykh Soveshchanii po Gidravlike, No. 7. Gosénergoizdat (1963).

  3. A. S. Abelev, “Relationship between pressure pulsation at individual points of a gate and pulsation of the entire hydrodynamic load acting on the gate”. Izv. VNIIG.69 (1963).

  4. A. S. Abelev, “Determination of pulsation of the total hydrodynamic load acting on plane deep gates”, Izv. VNIIG,68 (1961).

  5. V. I. Petrashen’, “On vibration and frequencies of free fluctuations of hydraulic gates”, Izv. VNIIG,70 (1962).

  6. V. I. Petrashen’, “On fluctuations of a ribbed gate”, Gidrotekh. Stroitel’, No. 6 (1962).

  7. V. A. Palyunas, “On the problem of modeling vibrations of hydrotechnical gates,”, VNII VODGEO, Scientific Communications, Gidrotekhnika (1961).

  8. P. P. Kul’mach, “On the effect of liquid on the fluctuation of a rigid bar”, Trudy VTU VMU, No. 35 (1956).

  9. L. S. Maksimov and L. A. Goncharov, “Vibration of gates of water-carrying galleries and locks”, Tr. Koord. Sov. po Gidrot, No. 7. Gosénergoizdat (1963).

  10. L. S. Maksimov, “Pulsation of pressure on the apron and fluctuations of spillways”, Tr. Gidroproekt sbornik, No. 7 (1962).

  11. E. Allersma, “The virtual mass of a submerged sluice gate”, IAHR, 8th congress, Montreal (1959).

  12. E. Moullin and A. D. Brown, “On the periods of a free-free bar immersed in water”, Proceedings of the Cambridge Phil. Soc.218, part 1, Jan. (1928).

  13. M. A. Rudyk, A. A. Davydov, and N. V. Klingert, “Prototype investigations of a flat surface gate of the dam of XXII Congress KPSU Volga HES,”, Gidrotekh. Stroitel, No. 6 (1964).

  14. D. A. Kharin and M. S. Fomichev, “Vibration of hydrotechnical structures and pulsation of hydrotechnical pressure,” Tr. Geof. Inst. AN SSSR143 No. 16 (1952).

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Authors
  1. M. A. Rudyk
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  2. A. R. Freishist
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  3. A. A. Davydov
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  4. N. V. Klingert
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Additional information

Deceased

Translated from Gidrotekhnicheskoe Stroitel’stvo, No. 2, pp. 30–34, February, 1968.

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Rudyk, M.A., Freishist, A.R., Davydov, A.A. et al. Prototype investigations of dynamics of a triple-rib of a plane gate of the dam of the XXII Congress CPSU Volga Hes. Hydrotechnical Construction 2, 134–140 (1968). https://doi.org/10.1007/BF02376281

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