Search found 5 matches

by leedward
Wed Jul 30, 2008 2:18 am
Forum: Ambient vibration techniques
Topic: One question about Capon's method!
Replies: 2
Views: 7633

One question about Capon's method!

Hi, Marc, I have one question about Capon's method. I used three f-k beamformers to analyze the field testing data. They are conventional FDBF, Capon's and MUSIC methods. But Capon's method gave more scattered dispersion curves. Have you had this problem? The details can be seen in the attachment. L...
by leedward
Tue Oct 02, 2007 11:43 pm
Forum: Dinver usage
Topic: several simple questions about denotion in dinver.
Replies: 1
Views: 4029

several simple questions about denotion in dinver.

Hi, Marc, When I loaded one dispersion target, I opened the 'Import Ascii file' window. In the Y column part, I don't know exactly what 'error' and 'weight' are refered to? The f-k procedure I used is somewhat different from yours. So I can't get the variation of the dispersion curve like you did. I...
by leedward
Tue Oct 02, 2007 11:27 pm
Forum: Dinver usage
Topic: Can Dinver deal with this kind of dispersion curve?
Replies: 3
Views: 5549

I am very interested in specifying more than one mode for a particular branch of a dispersion curve. Because I have gotten some dispersion curves with big jump to higer mode. So how can I do to define this part as the higer mode and the rest as the fundamental mode? Thanks
by leedward
Fri Sep 14, 2007 4:23 pm
Forum: Dinver usage
Topic: Can Dinver deal with this kind of dispersion curve?
Replies: 3
Views: 5549

Can Dinver deal with this kind of dispersion curve?

Hi, Marc,

Can Dinver deal with the dispersion curve with dominant higher mode? Thanks.
by leedward
Thu Sep 13, 2007 3:13 pm
Forum: Ambient vibration techniques
Topic: one question about FK passive measurement!
Replies: 1
Views: 5923

one question about FK passive measurement!

I am reading the paper named " Array performances for ambient vibrations on a shallow structure and consequences over Vs inversion (Marc Wathelet, et. al)". I got one question. In the Figure 5 and 6, you have shown that the calculated dispersion curves will deviate from the theorectical on...

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