{"id":30282,"date":"2018-09-04T05:29:41","date_gmt":"2018-09-04T05:29:41","guid":{"rendered":"\/forum\/forums\/topic\/aerodynamic-damping-normalization\/"},"modified":"2018-09-04T05:29:41","modified_gmt":"2018-09-04T05:29:41","slug":"aerodynamic-damping-normalization","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/aerodynamic-damping-normalization\/","title":{"rendered":"aerodynamic damping normalization"},"content":{"rendered":"<p><span style=\"color: #222222; font-size: small;\">&nbsp;I can calculate aerodynamic damping as a function of ib phase angle in CFX for imported&nbsp;<\/span>modeshapes<span style=\"color: #222222; font-size: small;\">. Those are work done by the fluid on the blades in units of Joule per vibration cycle.&nbsp;I have trouble in proper normalization of this damping for ANSYS forced response analyses. In the attached picture file, there are snapshots from 2 publications. There are two different normalizations, which are applied to ANSYS aeromechanics (harmonic balance analysis for forced response). The difference is actually a factor of&nbsp; &#8220;2*pi&#8221; as one defines mode frequency as rad\/sec, and another defines it as 1\/s. Which one is true for the specific forced response analyses implemented in ANSYS?<\/span><\/p>\n<p><\/p>\n<p><span style=\"color: #222222; font-size: small;\"><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/30f31251-8aef-4e4b-a7b2-a9510055ff68\/79a23dad-9243-46b8-943b-a951005a4bdb_damping-normalization.jpg?width=690&amp;upscale=false\" alt=\"\"><\/span><\/p>\n","protected":false},"template":"","class_list":["post-30282","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["2451"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0","0","0","0"],"_btv_view_count":["1202"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["30282"],"_bbp_forum_id":["27792"],"_bbp_engagement":["7915","158625","175276"],"_bbp_voice_count":["3"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["110088"],"_bbp_last_active_id":["110088"],"_bbp_last_active_time":["2020-04-03 15:13:43"]},"test":"tayyip"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/30282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/30282\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=30282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}