Transformer rupture and impact on the reinforced blast wall
Transformer is one of vital equipment to provide stable and reliable electricity to the community. The capability to step up the voltage or vice versa, made transformer is main equipment to look after in the electricity industry. The transformer is quiet while in operation, therefore it is hardly to...
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| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/5860/ http://eprints.uthm.edu.my/5860/4/1_x.pdf |
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| Summary: | Transformer is one of vital equipment to provide stable and reliable electricity to
the community. The capability to step up the voltage or vice versa, made
transformer is main equipment to look after in the electricity industry. The
transformer is quiet while in operation, therefore it is hardly to realise if placed
inside the building. The price for one transformer can be up to few millions
Malaysian Ringgit. The worst of the transformer explosion may lead to the major
blackout. Transformer ruptures maybe due to, lack of maintenance or the
problems inside itself whilst in operation. In the past at substation, the transformers
were placed adjacent to each other and without a wall in between. Nowadays,
installing walls between transformers have become in practice to protect other
transformers if in any explosion events. In Malaysia, a reinforced wall is built for
the protection. The finite element method (FEM) is employed for the simulation
of the potential damage of reinforced blast wall. A FEM software is used due to
the capability of analysing and simulating reinforced concrete structures subjected
to high rate and short duration dynamic loading in the previous research works.
The simulation results clearly reveal that, the behaviour of the crack propagation
is almost identical for the different blast modes. After the impact load is applied,
the cracks start to occur at certain time instants at the bottom of the wall on the
transformer side. This follows later with the cracks on the other side at about one
third of the wall height. The propagations of the crack then continue to move
downwards in the curvy shape. The previous work and the field test provide
indirect evidence that the structural behaviour and the cracks patterns are
comprehended. |
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