Damper as a Rigid Insert for Rigid Bus Structures Oscillation Damping

Abstract:

One of the main problems in a design of rigid bus structures in open switchgears devices is a structural stabilization under the influence of various dynamic loads. The implementation of rigid bus structures with large spans of pipe-bus showed a real danger of the wind resonance for cylindrical pipe-bus structures (aeroelastic oscillations). This phenomenon is dangerous in that at low wind speeds there are intense pipe's oscillations in vertical plane, adding to the static loads an essential dynamic component. Its level is comparable with the loads from the weight of the structures and can, in combination with the rest loads, cause stresses close to the maximum admissible for the 1^st group of limit states. The problem of reducing the level of structural oscillations in many cases is associated with the need to increase the rigidity and reduce the material consumption, but it's important to meet the technological requirements imposed by operating conditions and protect people from harmful vibration. In a paper are considering a new method for damping oscillations for rigid bus structures under the action of a wind vortex excitation – damper as a rigid insert. Is presented a mathematical model of the joint work of the rigid bus structure with the damper as the rigid insert. Have carried out analytical researches of the joint work of the rigid bus structure with the damper as the rigid insert.

• Periodical: Materials Science Forum (Volume 931)
• Pages: 14-18
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.931.14
• Online since: September 2018
• Authors: Serafim A. Fomenko, Igor M. Garanzha*, Anton V. Tanasoglo
• Keywords: Differential Equations of Transverse Oscillations, Eddy Excitation of Wind, Oscillation Damper, Rigid Bus

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