{"id":351,"date":"2023-06-29T13:15:57","date_gmt":"2023-06-29T13:15:57","guid":{"rendered":"https:\/\/akustikdoktorn.se\/?page_id=351"},"modified":"2025-04-30T07:50:21","modified_gmt":"2025-04-30T07:50:21","slug":"measure","status":"publish","type":"page","link":"https:\/\/akustikdoktorn.se\/en\/measure\/","title":{"rendered":"M\u00e4tningar och ber\u00e4kningar"},"content":{"rendered":"
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Calculated sound and vibration levels in\u00a0 rail vehicle interior<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Simulation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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In modern product development time to market is key. Well set-up simulation schemes can provide design guidance before prototypes are available. Akustikdoktorn has expert experience from virtual CAE tools such as Finite Element (FE)<\/a>, Statistical Energy Analys (SEA)<\/a> as well as RayTracing and Transfer matrix methods (TMM)<\/a>. Dr. Orrenius lectures in energy methods and general noise control at University of Genua and has long experience using simulation tools, e.g for optimization of noise control measures with comparative studies of different designs.<\/p>

Akustikdoktorn has access to state-of-the-art CAE calculation tools using e.g. coupled SEA-FEM for transmission in vehicle structures including structure-borne sound, as well as TMM tools for assessing complex partitions such as aircraft fuselage structures, building structures and noise barriers. We also have software for sound propagation in channels and silencer systems. Through our partnership with Akustix, we can also offer qualified analyses of community noise with SoundPLAN.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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In-situ sound reduction testing of rail-car floor<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Pass-by noise tests for EU project Acoutrain<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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\"When you can measure you know\" (Lord Kelvin)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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L\u00f6sningen till bullerproblem kan vara r\u00e4ttfram; en fl\u00e4kt g\u00e5r kanske att varvtalsstyra med v\u00e4sentligt l\u00e4gre ljudniv\u00e5er som resultat. Men ofta kr\u00e4vs en djupare f\u00f6rst\u00e5else f\u00f6r problemet: vilka k\u00e4llor och transmissionsv\u00e4gar dominerar?  Hur blir det efter planerad \u00e5tg\u00e4rd<\/a>?  Denna f\u00f6rst\u00e5else kan uppn\u00e5s genom en genomt\u00e4nkt analysstrategi som innefattar s\u00e5v\u00e4l unders\u00f6kande m\u00e4tningar som ber\u00e4kningar. Annars finns en klar risk att man \u00e5tg\u00e4rdar fel problem.<\/p>\n

Akustikdoktorn har erfarenheten och det teoretiska kunnandet f\u00f6r att skr\u00e4ddarsy analysarbetet efter behoven och f\u00f6ruts\u00e4ttningarna f\u00f6r att n\u00e5 effektiva \u00e5tg\u00e4rder. F\u00f6r att tysta en bullrig kompressor en trappa ner kan det kr\u00e4vas s\u00e5v\u00e4l f\u00f6rb\u00e4ttrad vibrationsisolering som en ljudf\u00e4lla i en ventilationskanal. Unders\u00f6kande m\u00e4tningar ger svaret.<\/a><\/p>\n

Ljudreduktionsindex f\u00f6r en v\u00e4gg eller ett golv och ljudeffekten f\u00f6r en bullrig maskin best\u00e4ms med ISO standarder.<\/a> Men f\u00f6r att f\u00f6rst\u00e5 vilka buller\u00e5tg\u00e4rder som \u00e4r mest effektiva, eller hur vikten p\u00e5 en konstruktion b\u00e4st kan minskas, kan mer avancerade metoder kr\u00e4vas som intensitetsskanning och experimentell TPA (Transfer Path Analysis). Akustikdoktorn kan genomf\u00f6ra s\u00e5dana tester och tillsammans med era konstrukt\u00f6rer ta fram f\u00f6rslag p\u00e5 l\u00e4mpliga konstruktions\u00e4ndringar.  <\/p>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

Calculated sound and vibration levels in\u00a0 rail vehicle interior Ber\u00e4kningar Dagens produktutveckling kr\u00e4ver korta ledtider till marknad. Simuleringar med ett tydligt m\u00e5l att finna smarta och effektiva konstruktionsl\u00f6sningar,\u00a0 kortar ner ledtider och ger relevant beslutsunderlag innan prototyper finns tillg\u00e4ngliga. Akustikdoktorn har expertkunnande och erfarenhet av att anv\u00e4nda virtuella CAE verktyg som Finita Element (FE), Statistisk …<\/p>\n

M\u00e4tningar och ber\u00e4kningar<\/span> Read More »<\/a><\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"class_list":["post-351","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/akustikdoktorn.se\/en\/wp-json\/wp\/v2\/pages\/351","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/akustikdoktorn.se\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/akustikdoktorn.se\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/akustikdoktorn.se\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/akustikdoktorn.se\/en\/wp-json\/wp\/v2\/comments?post=351"}],"version-history":[{"count":79,"href":"https:\/\/akustikdoktorn.se\/en\/wp-json\/wp\/v2\/pages\/351\/revisions"}],"predecessor-version":[{"id":1528,"href":"https:\/\/akustikdoktorn.se\/en\/wp-json\/wp\/v2\/pages\/351\/revisions\/1528"}],"wp:attachment":[{"href":"https:\/\/akustikdoktorn.se\/en\/wp-json\/wp\/v2\/media?parent=351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}