Analytical Evaluation of a Seismic Capability of Actual LNG Tank Under Severe Seismic Excitation

2002 ◽  
Author(s):  
Hideyuki Tazuke ◽  
Satoru Yamaguchi ◽  
Hiroshi Akiyama ◽  
Tomoki Sakurai ◽  
Toshio Chiba
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Fem Analysis ◽  
Seismic Excitation ◽  
Analytical Evaluation ◽  
Analysis Methods ◽  
Earthquake Resistant ◽  
Lng Tank ◽  
Vibration Tests

The Hyogoken-Nanbu Earthquake in 1995 has recognized us the importance of the resistance capability against earthquakes on the thermal power plant. In this respect, seismic proving tests on the equipment of the thermal power plant have been planned and carried out. Vibration tests and FEM analysis were performed to demonstrate the earthquake resistant property of the tank. FEM analysis was adopted for analyzing lateral slipping and elephant foot bulge (EFB). To verify the validity of the FEM analysis, the results of tests were compared with those of analysis. Using these analysis methods, we estimate the seismic capability of the LNG tank under severe seismic excitation. As the results, we confirmed that lateral slipping and EFB did not occurred at severe seismic excitation.

An Experimental Study of EFB Behavior of Large Model Tank

2002 ◽  
Author(s):  
Hideyuki Tazuke ◽  
Satoru Yamaguchi ◽  
Hiroshi Akiyama ◽  
Tomoki Sakurai ◽  
Toshio Chiba
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Large Scale ◽  
Thermal Power ◽  
Fem Analysis ◽  
Scale Model ◽  
Nonlinear Phenomena ◽  
Large Tank ◽  
Lng Tank ◽  
Vibration Tests

We recognized the importance of the seismic capability against earthquakes of the thermal power plant on the occurrence of the Hyogoken-Nanbu Earthquake in 1995. In this respect, seismic proving tests on the equipment of the thermal power plant had been planned and carried out. Vibration tests and FEM analysis were performed to demonstrate the seismic capability of the equipment. A liquefied natural gas (LNG) tank was selected as one of the subjects. One of the remarkable nonlinear phenomena of an actual large tank was Elephant Foot Bulge (EFB). To investigate the EFB behavior of the tank, vibration test of the large scale model tank and FEM analysis were conducted. Then we estimated EFB behavior of the tank.

An Experimental Study of Slip Behavior of Large Scale Model Tank

2002 ◽  
Author(s):  
Hideyuki Tazuke ◽  
Satoru Yamaguchi ◽  
Hiroshi Akiyama ◽  
Tomoki Sakurai ◽  
Toshio Chiba
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Large Scale ◽  
Thermal Power ◽  
Fem Analysis ◽  
Seismic Excitation ◽  
Partial Slip ◽  
Scale Model ◽  
Nonlinear Phenomena ◽  
Large Scale Model

We recognized the importance of the seismic capability against earthquakes of the thermal power plant on the occurrence of the Hyogoken-Nanbu Earthquake in 1995. In this respect, seismic proving tests on the equipment of the thermal power plant had been planned and carried out. Vibration tests and FEM analysis were performed to demonstrate the seismic capability of the equipment. LNG tank was selected as one of the subjects. One of the remarkable nonlinear phenomena was lateral slip for an actual large tank. To investigate the slip behavior of the tank, vibration test of the large scale model tank and FEM analysis of actual tank were conducted. We estimated the slip behavior of the tank under severe seismic excitation. As the results, we confirmed that lateral slipping was mainly partial slip and total slip did not occur at severe seismic excitation.

Seismic Proving Test of Equipment and Structures in Thermal Conventional Power Plant

2002 ◽  
Vol 124 (2) ◽  
pp. 133-143 ◽  
Author(s):  
Hideyuki Tazuke ◽  
Satoru Yamaguchi ◽  
Kazuo Ishida ◽  
Tomoki Sakurai ◽  
Hiroshi Akiyama ◽  
...  
Keyword(s):  
Power Plant ◽  
Power Supply ◽  
Comprehensive Evaluation ◽  
Fem Analysis ◽  
Electric Power Supply ◽  
Power Failure ◽  
Earthquake Resistant ◽  
Lng Tank ◽  
Conventional Power Plant ◽  
Extended Power

The importance of ensuring uninterrupted electric power supply was reaffirmed on the occasion of the Hyogoken-Nanbu Earthquake in 1995, when the district was affected by extended power failure. The notice has been attached to the resistance of power generation facilities to severe earthquake. The seismic proving test of equipment and structures in thermal conventional power plant was conducted. Tests were performed to demonstrate the earthquake resistant property of the LNG tank and to verify the validity of the FEM analysis. It was adopted for analyzing lateral slipping and EFB. With the comprehensive evaluation of tests and analysis, the seismic capability of LNG tank was assessed.

Nonlinear Trend Analysis of Mill Fan System Vibrations for Predictive Maintenance and Diagnostics

2012 ◽  
Vol 58 (4) ◽  
pp. 351-356
Author(s):  
Mincho B. Hadjiski ◽  
Lyubka A. Doukovska ◽  
Stefan L. Kojnov
Keyword(s):  
Power Plant ◽  
Trend Analysis ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Balkan Peninsula ◽  
Predictive Maintenance ◽  
Nonlinear Trend ◽  
The Subject ◽  
The Given

Abstract Present paper considers nonlinear trend analysis for diagnostics and predictive maintenance. The subject is a device from Maritsa East 2 thermal power plant a mill fan. The choice of the given power plant is not occasional. This is the largest thermal power plant on the Balkan Peninsula. Mill fans are main part of the fuel preparation in the coal fired power plants. The possibility to predict eventual damages or wear out without switching off the device is significant for providing faultless and reliable work avoiding the losses caused by planned maintenance. This paper addresses the needs of the Maritsa East 2 Complex aiming to improve the ecological parameters of the electro energy production process.

FLY ASH FROM THERMAL POWER PLANT, RAW MATERIAL FOR GLASS-CERAMIC

2013 ◽  
Vol 12 (2) ◽  
pp. 337-342 ◽  
Author(s):  
Firuta Goga ◽  
Roxana Dudric ◽  
Calin Cormos ◽  
Florica Imre ◽  
Liliana Bizo ◽  
...  
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Glass Ceramic ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Raw Material ◽  
Plant Raw Material
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