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<\/p>\nHello<\/p>\n
<\/p>\n
i am trying to model simplified model of tympanic membrane. I would like to model 2D sectorial annulus membrane according to followin fig. <\/p>\n
<\/p>\n
My goal is to find natural freq. of this membrane. The parameters i would like to use: <\/p>\n Firstly i used ASYS Design modeler for creating geometry. I created surface with thicknes 0,1mm Thanks<\/p>\n","protected":false},"template":"","class_list":["post-32379","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["4551"],"_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":["747"],"_bbp_subscription":["236794"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["32379"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","158123"],"_bbp_voice_count":["2"],"_bbp_reply_count":["10"],"_bbp_last_reply_id":["73618"],"_bbp_last_active_id":["73618"],"_bbp_last_active_time":["2019-01-02 20:56:48"]},"test":"kravky"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/32379","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\/32379\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=32379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
R1=0,5mm (inner radius)
R2=4,5mm (outer radius)
alfa=20deg
E=33MPa
Poissonous ratio = 0,3
density=1200kg\/m^3
thicknes=0,1mm
T=35N\/mm^2 = 35000000Pa (uniform tension in membrane)<\/strong><\/p>\n
Next i defined material properties and boundary conditions in ansys mechanical (fixed inner and outer radius), however i cannot define tension. I need to set T=35MPa in order to achieve pre-stress in structural analysis and then i could go onto modal analysis.
The problem is i cannot apply pressure to edge.
How could i apply uniform tension T=35MPa to entire membrane ? (membrane is considered as prestressed)
Am I doing something worng when applying boundary condition?<\/p>\n