{"id":28487,"date":"2017-12-12T13:41:55","date_gmt":"2017-12-12T13:41:55","guid":{"rendered":"\/forum\/forums\/topic\/material-damping-and-modal-analysis\/"},"modified":"2023-07-18T08:33:01","modified_gmt":"2023-07-18T08:33:01","slug":"material-damping-and-modal-analysis","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/material-damping-and-modal-analysis\/","title":{"rendered":"material damping and modal analysis"},"content":{"rendered":"

Hi everybody,<\/p>\n

<\/p>\n

I’m Domenico and I’m new in the forum.<\/p>\n

<\/p>\n

I need to solve a trouble with Ansys WB 18.0. I have to do a damped modal analysis, and so I need to set the damping values somewhere. I read in an official Ansys guide referred to 15.0 version, that it is possible to set alpha and beta damping values in the material editor (in this case different values can be assigned to different materials), or in the analysis setting options (in this case is a global damping value). However, if I try with the first option, an error message is generated:<\/p>\n

<\/p>\n

“Material alpha and\/or material beta damping coefficient defined in Engineering data are not contributing to modal damping calculation” <\/p>\n

<\/p>\n

How can I solve the problem? <\/p>\n

<\/p>\n

Moreover, how can I introduce directly the Damping coefficient ratio (that is funcion of alpha and beta coefficients)?<\/p>\n

<\/p>\n

Thank you <\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

p.s. screenshorts are desirables.<\/p>\n","protected":false},"template":"","class_list":["post-28487","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t