scholarly journals Estimation of efficiency of damping parameters in seismic insulation systems

2012 ◽  
Vol 27 (1) ◽  
pp. 37-43 ◽  
Author(s):  
N.V. Kovaleva ◽  
Yu.L. Rutman
Keyword(s):  
Insulation Systems ◽  
Seismic Insulation

scholarly journals Criteria for damping parameters optimization in seismic isolated structures

2020 ◽  
Vol 17 (5) ◽  
pp. 94-100
Author(s):  
N. V. Ostrovskaya ◽  
◽  
D. E. Bondarev ◽  
Keyword(s):  
Optimization Criterion ◽  
Parameters Optimization ◽  
Optimal Damping ◽  
Insulation Systems ◽  
Seismic Insulation ◽  
Isolated Structures ◽  
Selection Of

All kinds of seismic insulation systems are widely used to protect various structures and buildings, including unique ones, against earthquakes. The efficiency of such systems depends significantly on the competent selection of damping parameters. The article considers a general approach to selecting optimal damping parameters, both by the criterion of absolute accelerations and by the kinematic criterion. The optimization criterion for unique structures is also proposed.

Seismic Protection of an Over-Ground Parking Lot over the Dambovita River Using the Basic Insulation Method

2020 ◽  
Vol 896 ◽  
pp. 337-346
Author(s):  
Edward Rășchitor ◽  
Carmen Elisabeta Radu ◽  
Iosif Tempea
Keyword(s):  
Seismic Protection ◽  
Seismic Action ◽  
Tectonic Plates ◽  
Structure Deformation ◽  
Oscillatory Movement ◽  
Parking Lot ◽  
Insulation Systems ◽  
Seismic Insulation ◽  
The Impact ◽  
Operational Modes

Earthquakes cause rapid variations of direction, speed and acceleration. Vibrations are generated either by the moves of the tectonic plates, or by the volcanic activity, or by the collapse of the geological layers. The foundation conveys the maintained oscillatory movement and executes free cushioned oscillations. Due to the seismic action, an energy balance is created that contains: the energy induced into the structure, the energy absorbed by the structure and the energy returned to the ground. All these forms of energy constitute the capable energy of the structure. This energy reflects the possibilities of elastic structure deformation but also the elastoplastic deformation capacity. The seismic insulation systems are intended to reduce the impact of earthquakes on buildings by means of special devices. One uses two types of seismic systems: active and passive. The insulation of the propping base of the structure aims at inserting a smaller amount of energy into the superstructure. The protection of the structures exposed to the risk of earthquake is based on the three fundamental operational modes: insulation, connection, dissipation of energy. Connectors. Insulators and seismic dampers. The centrically braced metallic frames provide resilience, rigidity and ductility, being thus ideal for the bracing of the seismic systems.

INSULATION SYSTEMS ENGINEERING

1984 ◽  
Vol 45 (C1) ◽  
pp. C1-615-C1-617
Author(s):  
H. Becker ◽  
P. G. Marston
Keyword(s):  
Systems Engineering ◽  
Insulation Systems

The influence of ultrasound signal parameters on sonoluminescence light intensity

2013 ◽  
Vol 62 (4) ◽  
pp. 605-612
Author(s):  
Marek Szmechta ◽  
Tomasz Boczar ◽  
Dariusz Zmarzły
Keyword(s):  
Acoustic Emission ◽  
Acoustic Waves ◽  
Power Transformer ◽  
Electrical Power ◽  
Partial Discharges ◽  
Research Project ◽  
Insulation Systems ◽  
Secondary Phenomenon ◽  
New Research ◽  
The Relationship

Abstract Topics of this article concern the study of the fundamental nature of the sonoluminescence phenomenon occurring in liquids. At the Institute of Electrical Power Engineering at Opole University of Technology the interest in that phenomenon known as secondary phenomenon of cavitation caused by ultrasound became the genesis of a research project concerning acoustic cavitation in mineral insulation oils in which a number of additional experiments performed in the laboratory aimed to determine the influence of a number of acoustic parameters on the process of the studied phenomenona. The main purpose of scientific research subject undertaken was to determine the relationship between the generation of partial discharges in high-voltage power transformer insulation systems, the issue of gas bubbles in transformer oils and the generated acoustic emission signals. It should be noted that currently in the standard approach, the phenomenon of generation of acoustic waves accompanying the occurrence of partial discharges is generally treated as a secondary phenomenon, but it can also be a source of many other related phenomena. Based on our review of the literature data on those referred subjects taken, it must be noted, that this problem has not been clearly resolved, and the description of the relationship between these phenomena is still an open question. This study doesn’t prove all in line with the objective of the study, but can be an inspiration for new research project in the future in this topic. Solution of this problem could be a step forward in the diagnostics of insulation systems for electrical power devices based on non-invasive acoustic emission method.

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