Error in eigen value analysis

[lutfulla_aeam]

Hi
during eigen value analysis the period is decreasing with the increase of subdivision of the same element which is not desired for infrmFB. In case of infrmFB the period should remain same whatever may be the no of subdivision.

[zenginse]

Hi lutfulla_aeam,

I had been through the same errors. If you tell us what kind of structure that you are analyzing I can, personally, give you some advices.

But you can change analysis type in settings/eigenvalue from Lanczos to Ritz transformation.

Thx.

[z.gronti]

Dear Lutfulla,

This issue has been already answered in the topic that you have created http://www.seismosoft.com/forum/topic.asp?TOPIC_ID=1893

Please don't write the same issues in different topics.

[lutfulla_aeam]

I am working on bridge pier.quote:Originally posted by zenginse

Hi lutfulla_aeam,

I had been through the same errors. If you tell us what kind of structure that you are analyzing I can, personally, give you some advices.

But you can change analysis type in settings/eigenvalue from Lanczos to Ritz transformation.

Thx.