![\"\"](\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/1050afe6-7769-403a-bf0a-aa7700765420\/b956fe4a-d89e-4c6c-a69a-aaa900c9d2a7_20190814-210904.jpg?width=690&upscale=false\")
<\/p>\nhello <\/p>\n
<\/p>\n
I am doing some modal analysis for simple beam <\/p>\n
<\/p>\n
11 beams in a row and it has same material and stiffness.<\/p>\n
<\/p>\n
total 22 modes for 1st mode(x,z dir) <\/p>\n
<\/p>\n
but only 12 modes for 2nd mode <\/p>\n
<\/p>\n
I do not understand why it has only 12 mode it should be 22 modes for 2nd mode<\/p>\n
<\/p>\n
top and bottom are fixed all <\/p>\n
<\/p>\n
could you explain this?<\/p>\n
<\/p>\n
here is my model and results<\/p>\n
<\/p>\n
<\/p>\n
<\/p>\n
*** FREQUENCIES FROM BLOCK LANCZOS ITERATION ***<\/p>\n
<\/p>\n
<\/p>\n
<\/p>\n
MODE FREQUENCY (HERTZ) <\/p>\n
<\/p>\n
<\/p>\n
<\/p>\n
<\/p>\n
<\/p>\n
1 2.202637444537 <\/p>\n
<\/p>\n
2 2.202637444537 <\/p>\n
<\/p>\n
3 2.202637444537 <\/p>\n
<\/p>\n
4 2.202637444537 <\/p>\n
<\/p>\n
5 2.202637444537 <\/p>\n
<\/p>\n
6 2.202637444537 <\/p>\n
<\/p>\n
7 2.202637444537 <\/p>\n
<\/p>\n
8 2.202637444537 <\/p>\n
<\/p>\n
9 2.202637444538 <\/p>\n
<\/p>\n
10 2.202637444538 <\/p>\n
<\/p>\n
11 2.202637444538 <\/p>\n
<\/p>\n
12 2.202637444538 <\/p>\n
<\/p>\n
13 2.202637444538 <\/p>\n
<\/p>\n
14 2.202637444538 <\/p>\n
<\/p>\n
15 2.202637444538 <\/p>\n
<\/p>\n
16 2.202637444538 <\/p>\n
<\/p>\n
17 2.202637444538 <\/p>\n
<\/p>\n
18 2.202637444538 <\/p>\n
<\/p>\n
19 2.202637444538 <\/p>\n
<\/p>\n
20 2.202637444538 <\/p>\n
<\/p>\n
21 2.202637444538 <\/p>\n
<\/p>\n
22 2.202637444538 <\/p>\n
<\/p>\n
23 4.962273009864 <\/p>\n
<\/p>\n
24 4.962273009864 <\/p>\n
<\/p>\n
25 4.962273009864 <\/p>\n
<\/p>\n
26 4.962273009864 <\/p>\n
<\/p>\n
27 4.962273009864 <\/p>\n
<\/p>\n
28 4.962273009864 <\/p>\n
<\/p>\n
29 4.962273009864 <\/p>\n
<\/p>\n
30 4.962273009864 <\/p>\n
<\/p>\n
31 4.962273009864 <\/p>\n
<\/p>\n
32 4.962273009864 <\/p>\n
<\/p>\n
33 4.962273009864 <\/p>\n
<\/p>\n
34 4.962273009865 <\/p>\n
<\/p>\n
35 11.90362864830 <\/p>\n
<\/p>\n
36 11.90362864830 <\/p>\n
<\/p>\n
37 11.90362864830 <\/p>\n
<\/p>\n
38 11.90362864830 <\/p>\n
<\/p>\n
39 11.90362864830 <\/p>\n
<\/p>\n
40 11.90362864830 <\/p>\n
<\/p>\n
41 11.90362864830 <\/p>\n
<\/p>\n
42 11.90362864830 <\/p>\n
<\/p>\n
43 11.90362864830 <\/p>\n
<\/p>\n
44 11.90362864830 <\/p>\n
<\/p>\n
45 11.90362864830 <\/p>\n
<\/p>\n
46 11.90362864830 <\/p>\n
<\/p>\n
47 11.90362864830 <\/p>\n
<\/p>\n
48 11.90362864830 <\/p>\n
<\/p>\n
49 11.90362864830 <\/p>\n
<\/p>\n
50 11.90362864830 <\/p>\n
<\/p>\n
51 11.90362864830 <\/p>\n
<\/p>\n
52 11.90362864830 <\/p>\n
<\/p>\n
<\/p>\n","protected":false},"template":"","class_list":["post-37149","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["9324"],"_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"],"_btv_view_count":["306"],"_bbp_subscription":["240951"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["37149"],"_bbp_forum_id":["27791"],"_bbp_engagement":["160648","166282"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["92600"],"_bbp_last_active_id":["92600"],"_bbp_last_active_time":["2019-08-21 05:44:18"]},"test":"byungchun"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/37149","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\/37149\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=37149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}