Concrete Support Structure for Hydroelectric Generators Subjected to Rotor Dynamic Loads

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Fältnamn	Indikatorer	Metadata
000		02719naa a2200301 4500
001		oai:DiVA.org:kth-166765
003		SwePub
008		150515s2014 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1667652 URI
040		a (SwePub)kth
041		a engb eng
042		9 SwePub
072	7	a vet2 swepub-contenttype
072	7	a kon2 swepub-publicationtype
100	1	a Gasch, Tobiasu KTH,Betongbyggnad4 aut0 (Swepub:kth)u1vybvn3
245	1 0	a Concrete Support Structure for Hydroelectric Generators Subjected to Rotor Dynamic Loads
264	1	a Bali,c 2014
338		a print2 rdacarrier
500		a NV 201505128
520		a In earlier times, the generators of the hydropower plants ran more or less continuously, while nowadays there are many planned starts and stops. The hydropower stations are thereby, due to the new pattern of operation, subjected to loads that they were not originally designed for. The aim of this study is to understand the complex interaction between the power generating system and the supporting concrete structure, during this new operational pattern.During inspections, cracks were discovered in the concrete structure of the power house, near the stator and rotor spider supports, at several hydropower stations in Sweden. In a previous phase of this project it was shown that these cracks initiated due to the combined effect of drying shrinkage, mechanical loads and variations in temperature due to starts and stops. Cracking of the concrete structure reduces its stiffness, which may result in larger loads acting on the structure and vibrations exceeding the unit’s strict tolerance limits.In this part of the study, the behaviour of a concrete support structure subjected to rotor dynamic loads during normal operation has been studied. A detailed 3D numerical model has been developed which include hydropower unit. The results of this study show that a reduced structural stiffness of the concrete support structure, due to cracking, influences the behaviour of the rotating system.
650	7	a TEKNIK OCH TEKNOLOGIERx Samhällsbyggnadsteknikx Infrastrukturteknik0 (SwePub)201042 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Civil Engineeringx Infrastructure Engineering0 (SwePub)201042 hsv//eng
700	1	a Hansson, Håkanu KTH,Betongbyggnad4 aut0 (Swepub:kth)u1d2tps8
700	1	a Malm, Richardu KTH,Betongbyggnad4 aut0 (Swepub:kth)u1dqmemh
700	1	a Hassanzadeh, Manouchehru Vattenfall AB / Lund University4 aut
710	2	a KTHb Betongbyggnad4 org
773	0	t International Symposium on Dams in a Global Enviromental Challanged Bali
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166765

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Av författaren/redakt...: Gasch, Tobias; Hansson, Håkan; Malm, Richard; Hassanzadeh, Man ...

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