{"id":"https://openalex.org/W2139071343","doi":"https://doi.org/10.1109/tec.1986.4765782","title":"Measuring the Torsional Modal Frequencies of a 900 MW Turbogenerator","display_name":"Measuring the Torsional Modal Frequencies of a 900 MW Turbogenerator","publication_year":1986,"publication_date":"1986-12-01","ids":{"openalex":"https://openalex.org/W2139071343","doi":"https://doi.org/10.1109/tec.1986.4765782","mag":"2139071343"},"language":"en","primary_location":{"id":"doi:10.1109/tec.1986.4765782","doi":"https://doi.org/10.1109/tec.1986.4765782","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tec.1986.4765782","pdf_url":null,"source":{"id":"https://openalex.org/S64770346","display_name":"IEEE Transactions on Energy Conversion","issn_l":"0885-8969","issn":["0885-8969","1558-0059"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-b","jufo-2","norway-2","poland-140","russia-white-list-1"],"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Energy Conversion","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5028744232","display_name":"Roland BIGRET","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I36169673","display_name":"Alstom (France)","ror":"https://ror.org/00t4db855","country_code":"FR","type":"company","lineage":["https://openalex.org/I36169673"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"R Bigret","raw_affiliation_strings":["Alsthom-Atlantique, France"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Alsthom-Atlantique, France","institution_ids":["https://openalex.org/I36169673"]}]},{"author_position":"middle","author":{"id":null,"display_name":"C J Coetzee","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I64102629","display_name":"Eskom (South Africa)","ror":"https://ror.org/02g2syx91","country_code":"ZA","type":"company","lineage":["https://openalex.org/I64102629"]}],"countries":["ZA"],"is_corresponding":false,"raw_author_name":"C J Coetzee","raw_affiliation_strings":["ESCOM, Rep. of South Africa","ESCOM, Republic of South Africa"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"ESCOM, Rep. of South Africa","institution_ids":["https://openalex.org/I64102629"]},{"raw_affiliation_string":"ESCOM, Republic of South Africa","institution_ids":["https://openalex.org/I64102629"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5062521849","display_name":"David Levy","orcid":"https://orcid.org/0000-0002-2490-8318","observed_orcids":["https://orcid.org/0000-0002-2490-8318"]},"institutions":[{"id":"https://openalex.org/I95023434","display_name":"University of KwaZulu-Natal","ror":"https://ror.org/04qzfn040","country_code":"ZA","type":"education","lineage":["https://openalex.org/I95023434"]}],"countries":["ZA"],"is_corresponding":false,"raw_author_name":"D C Levy","raw_affiliation_strings":["University of Natal, King George V Avenue, Durban, Rep. of South Africa"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Natal, King George V Avenue, Durban, Rep. of South Africa","institution_ids":["https://openalex.org/I95023434"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5105356524","display_name":"Ronald G. Harley","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I95023434","display_name":"University of KwaZulu-Natal","ror":"https://ror.org/04qzfn040","country_code":"ZA","type":"education","lineage":["https://openalex.org/I95023434"]}],"countries":["ZA"],"is_corresponding":false,"raw_author_name":"R G Harley","raw_affiliation_strings":["University of Natal, King George V Avenue, Durban, Rep. of South Africa"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Natal, King George V Avenue, Durban, Rep. of South Africa","institution_ids":["https://openalex.org/I95023434"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":2645,"currency":"USD","value_usd":2645},"apc_paid":null,"fwci":1.7906,"has_fulltext":false,"cited_by_count":7,"citation_normalized_percentile":{"value":0.80095264,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":87,"max":93},"biblio":{"volume":"EC-1","issue":"4","first_page":"99","last_page":"107"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12435","display_name":"Bladed Disk Vibration Dynamics","score":0.2939000129699707,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T12435","display_name":"Bladed Disk Vibration Dynamics","score":0.2939000129699707,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10305","display_name":"Power System Optimization and Stability","score":0.20200000703334808,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13644","display_name":"Control Systems in Engineering","score":0.17249999940395355,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/steam-turbine-generator","display_name":"steam turbine generator","score":0.7929999828338623},{"id":"https://openalex.org/keywords/natural-modes","display_name":"natural modes","score":0.503000020980835},{"id":"https://openalex.org/keywords/damping-factor","display_name":"damping factor","score":0.6940000057220459},{"id":"https://openalex.org/keywords/transient-torque","display_name":"transient torque","score":0.4339999854564667},{"id":"https://openalex.org/keywords/rotor-dynamics","display_name":"rotor dynamics","score":0.5920000076293945},{"id":"https://openalex.org/keywords/modal-analysis","display_name":"modal analysis","score":0.7519999742507935},{"id":"https://openalex.org/keywords/turbine-blades","display_name":"turbine blades","score":0.6159999966621399},{"id":"https://openalex.org/keywords/rotor-vibration","display_name":"rotor vibration","score":0.40299999713897705}],"concepts":[{"id":"https://openalex.org/C104286136","wikidata":"https://www.wikidata.org/wiki/Q1416137","display_name":"Modal analysis","level":3,"score":0.5644234418869019},{"id":"https://openalex.org/C71139939","wikidata":"https://www.wikidata.org/wiki/Q910194","display_name":"Modal","level":2,"score":0.5293736457824707},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.4747893214225769},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.4390754699707031},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.42387324571609497},{"id":"https://openalex.org/C78519656","wikidata":"https://www.wikidata.org/wiki/Q101333","display_name":"Mechanical engineering","level":1,"score":0.4052310585975647},{"id":"https://openalex.org/C119599485","wikidata":"https://www.wikidata.org/wiki/Q43035","display_name":"Electrical engineering","level":1,"score":0.35978275537490845},{"id":"https://openalex.org/C66938386","wikidata":"https://www.wikidata.org/wiki/Q633538","display_name":"Structural engineering","level":1,"score":0.34380418062210083},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.334281861782074},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.30238544940948486},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.27693700790405273},{"id":"https://openalex.org/C198394728","wikidata":"https://www.wikidata.org/wiki/Q3695508","display_name":"Vibration","level":2,"score":0.26307398080825806},{"id":"https://openalex.org/C188027245","wikidata":"https://www.wikidata.org/wiki/Q750446","display_name":"Polymer chemistry","level":1,"score":0.0},{"id":"https://openalex.org/C2775924081","wikidata":"https://www.wikidata.org/wiki/Q55608371","display_name":"Control (management)","level":2,"score":0.0},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tec.1986.4765782","doi":"https://doi.org/10.1109/tec.1986.4765782","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tec.1986.4765782","pdf_url":null,"source":{"id":"https://openalex.org/S64770346","display_name":"IEEE Transactions on Energy Conversion","issn_l":"0885-8969","issn":["0885-8969","1558-0059"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-b","jufo-2","norway-2","poland-140","russia-white-list-1"],"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Energy Conversion","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.4153999984264374,"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":2,"referenced_works":["https://openalex.org/W2045819134","https://openalex.org/W7034111076"],"related_works":["https://openalex.org/W2130358884","https://openalex.org/W4387144266","https://openalex.org/W2357827076","https://openalex.org/W2057613260","https://openalex.org/W2168074919","https://openalex.org/W2139284847","https://openalex.org/W1520619917","https://openalex.org/W4246539113","https://openalex.org/W2349944672","https://openalex.org/W1552150164"],"abstract_inverted_index":{"Transient":[0],"torques":[1,84,96],"exerted":[2],"on":[3,109,113],"the":[4,19,23,43,65,76,78,87,110,127,142,146,154,157,161,166],"rotors":[5],"of":[6,22,25,42,48,64,97,145,156],"turbine":[7,30,116],"generators":[8],"can":[9],"produce":[10],"high":[11],"stresses.":[12],"This":[13],"paper":[14],"describes":[15],"an":[16],"investigation":[17],"into":[18],"torsional":[20],"properties":[21],"shaft":[24,44,111],"a":[26,102],"1500":[27],"rpm":[28],"steam":[29],"generator":[31],"rated":[32],"900":[33],"MW":[34],"and":[35,45,53,60,70,72,112,135],"includes":[36],"1.":[37],"prediction,":[38],"by":[39,58,82,86,93,101,107,132,136,165],"theoretical":[40,133,143],"model":[41],"rotor":[46,79,147],"structure,":[47],"its":[49],"undamped":[50],"natural":[51,54,67,73,158],"vibrations":[52,68],"modes;":[55],"2.":[56],"determination,":[57],"measurements":[59,77],"subsequent":[61],"modal":[62,119,138,168],"analysis,":[63],"complex":[66],"(free":[69],"damped)":[71],"modes.":[74],"For":[75],"was":[80],"torqued":[81],"shock":[83],"applied":[85,100],"turning":[88],"gear,":[89],"as":[90,92],"well":[91],"harmonic":[94],"sinusoidal":[95],"variable":[98],"frequency":[99],"shaker.":[103],"Vibrations":[104],"were":[105,123],"measured":[106,137,164],"accelerometers":[108],"some":[114],"selected":[115],"blades.":[117],"Two":[118],"analysis":[120,139],"computer":[121],"programs":[122,169],"used":[124],"to":[125],"process":[126],"signals.":[128],"The":[129],"results":[130],"obtained":[131],"predictions":[134],"verify":[140],"that":[141],"characterization":[144],"structure":[148],"is":[149],"indeed":[150],"valid":[151],"for":[152],"calculating":[153],"values":[155],"frequencies.":[159],"However,":[160],"damping":[162],"factors":[163],"two":[167],"differ":[170],"significantly.":[171]},"counts_by_year":[{"year":2021,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}
