||
Figure 1 Lumped Parameter Model used to Generate Calibration Data Set
mass = diag(m1, m2, m3, m4, m5, m6);
stiff = [
k1+k2+k7+k8 | -k2 | 0 | 0 | -k7 | -k8 |
-k2 | k2+k3+k4+k9 | -k3 | -k4 | 0 | -k9 |
0 | -k3 | k3+k5 | 0 | 0 | 0 |
0 | -k4 | 0 | k4+k6 | 0 | 0 |
-k7 | 0 | 0 | 0 | k7+k10 | -k10 |
-k8 | -k9 | 0 | 0 | -k10 | k8+k9+k10 |
]
damp = [
c1+c2+c7+c8 | -c2 | 0 | 0 | -c7 | -c8 |
-c2 | c2+c3+c4+c9 | -c3 | -c4 | 0 | -c9 |
0 | -c3 | c3+c5 | 0 | 0 | 0 |
0 | -c4 | 0 | c4+c6 | 0 | 0 |
-c7 | 0 | 0 | 0 | c7+c10 | -c10 |
-c8 | -c9 | 0 | 0 | -c10 | c8+c9+c10 |
]
lambda_1~6:
-0.0492616110375208 + 22.0279321327432i
-0.0845676257681802 + 34.5158711852899i
-0.106538823989626 + 40.3827330585276i
-0.13757393163934 + 47.4495490621046i
-0.163873722953553 + 52.701495277419i
-0.340406506833205 + 79.4230083797601i
对应的6阶模态频率,模态阻尼为:
Order | modal freq. / Hz | damping ratio / % |
1 | 3.5058630516571 | 0.223631921320655 |
2 | 5.49338800267742 | 0.245010104146867 |
3 | 6.42713394891434 | 0.263821799948802 |
4 | 7.55186202236046 | 0.289936060751063 |
5 | 8.38774403116875 | 0.31094550518008 |
6 | 12.6406804802832 | 0.428595424966676 |
对应的6阶模态振型为:
非比例阻尼情形,见下面日志链接:
http://home.chinavib.com/blog-190415-20711.html
GMT+8, 2024-5-9 23:10 , Processed in 0.042251 second(s), 17 queries , Gzip On.
Powered by Discuz! X3.4
Copyright © 2001-2021, Tencent Cloud.