{"id":165619,"date":"2023-03-17T09:00:48","date_gmt":"2023-03-17T09:00:48","guid":{"rendered":"\/knowledge\/forums\/topic\/why-does-it-take-large-run-times-for-cqc-and-rose-methods-for-large-mode-shape-in-spectrum-analysis\/"},"modified":"2023-07-31T12:31:37","modified_gmt":"2023-07-31T12:31:37","slug":"why-does-it-take-large-run-times-for-cqc-and-rose-methods-for-large-mode-shape-in-spectrum-analysis","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/why-does-it-take-large-run-times-for-cqc-and-rose-methods-for-large-mode-shape-in-spectrum-analysis\/","title":{"rendered":"Why does it take large run times for CQC and ROSE Methods for large mode shape in spectrum analysis"},"content":{"rendered":"<p>If the number of modes in the required range are more the combination takes large run times, for examples if there are 50 modes in required range, the possible number of combinations are 50C2 i.e.,1225 combinations. When we do the modal superposition by SRSS method, the lcoper operations needed are 50, whereas CQC and ROSE require 1225 operations, hence it takes large time<\/p>\n","protected":false},"template":"","class_list":["post-165619","topic","type-topic","status-publish","hentry","topic-tag-2019-r3","topic-tag-mechanical","topic-tag-response-spectrum","topic-tag-structural-dynamics","topic-tag-structural-mechanics"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"If the number of modes in the required range are more the combination takes large run times, for examples if there are 50 modes in required range, the possible number of combinations are 50C2 i.e.,1225 combinations. When we do the modal superposition by SRSS method, the lcoper operations needed are 50, whereas CQC and ROSE\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/why-does-it-take-large-run-times-for-cqc-and-rose-methods-for-large-mode-shape-in-spectrum-analysis\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Knowledge | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Why does it take large run times for CQC and ROSE Methods for large mode shape in spectrum analysis | Ansys Knowledge\" \/>\n\t\t<meta property=\"og:description\" content=\"If the number of modes in the required range are more the combination takes large run times, for examples if there are 50 modes in required range, the possible number of combinations are 50C2 i.e.,1225 combinations. 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