w*******m
发帖数: 137 | 1 The structure have two parts. However, can the vibration of each part be
obtained or not? Thanks. |
D*****I
发帖数: 8268 | 2 fix one part and excite the other one...
【在 w*******m 的大作中提到】
: The structure have two parts. However, can the vibration of each part be
: obtained or not? Thanks.
|
w*******m
发帖数: 137 | 3 Thanks.
The situation is that the two can not be separated. However, I need the
signals to be separated.
【在 D*****I 的大作中提到】
: fix one part and excite the other one...
|
D*****I
发帖数: 8268 | 4 if you can't mechanically separate them, then the test is meaningless...
【在 w*******m 的大作中提到】
: Thanks.
: The situation is that the two can not be separated. However, I need the
: signals to be separated.
|
w*******m
发帖数: 137 | 5 I am only interested into one part of the structure. It is kind of
increasing the signal-noise ratio.
【在 D*****I 的大作中提到】
: if you can't mechanically separate them, then the test is meaningless...
|
h****g
发帖数: 74 | 6
【在 w*******m 的大作中提到】
: I am only interested into one part of the structure. It is kind of
: increasing the signal-noise ratio.
|
h****g
发帖数: 74 | 7 Is there has any mechanism connection between the two parts. |
w*******m
发帖数: 137 | 8 They are welded into each other. However, the materials are different. I am
not worried about the base. I do care the functional part. Thanks.
【在 h****g 的大作中提到】
: Is there has any mechanism connection between the two parts.
|
D*****I
发帖数: 8268 | 9 try add a big mass to the part that you don't want
you should still be able to excite most of the modes of the part you want to
measure
am
【在 w*******m 的大作中提到】
: They are welded into each other. However, the materials are different. I am
: not worried about the base. I do care the functional part. Thanks.
|
w*******m
发帖数: 137 | 10 It is a big mass of the base part. However, the modes of the very little
mass in the functional part will behave like noises for the total structure.
I do not know how to solve it. Thanks.
to
【在 D*****I 的大作中提到】
: try add a big mass to the part that you don't want
: you should still be able to excite most of the modes of the part you want to
: measure
:
: am
|
D*****I
发帖数: 8268 | 11 how do you excite it now? just hammer it?
you need to change the tip so you can get to the high frequency region
or try to use chirp signal
structure.
【在 w*******m 的大作中提到】
: It is a big mass of the base part. However, the modes of the very little
: mass in the functional part will behave like noises for the total structure.
: I do not know how to solve it. Thanks.
:
: to
|
w*******m
发帖数: 137 | 12 I use chirp signal.
【在 D*****I 的大作中提到】
: how do you excite it now? just hammer it?
: you need to change the tip so you can get to the high frequency region
: or try to use chirp signal
:
: structure.
|
b*********4
发帖数: 3542 | 13 try to measure the base and the functional part and subtract them to get the
clear mode of the functional part. There is a method called Ritzs method
might be helpful |
