Frequency of Timoshenko beam with crack
Frequency of Timoshenko beam with crack
(OP)
Hello people,
I am new here. I want to define crack in Timoshenko beam and obtain natural frequency (first mode or many).
1. So I need to set properties of the beam?
2. To put the crack somewhere in the beam?
3. To obtain the frequencies for free vibration without damping?
Regards!!!
I am new here. I want to define crack in Timoshenko beam and obtain natural frequency (first mode or many).
1. So I need to set properties of the beam?
2. To put the crack somewhere in the beam?
3. To obtain the frequencies for free vibration without damping?
Regards!!!





RE: Frequency of Timoshenko beam with crack
what FEA are you using ? does it analyze cracks ?
i'd start with looking at the manual for a dynamic example problem. see how that's done, and what you need to specify (yes, you'll need to define a set of properties).
then look for how it models cracks. you might siply dupicate some nodes (so that adjacent elements don't share common nodes).
oh, and put on your asbestos under-wear, i think you're about to get flamed.
RE: Frequency of Timoshenko beam with crack
RE: Frequency of Timoshenko beam with crack
have you tried googling ?
is this a student post ??
RE: Frequency of Timoshenko beam with crack
RE: Frequency of Timoshenko beam with crack
ht
//signed//
Christopher K. Hubley
Mechanical Engineer
Sunpower Incorporated
Athens, Ohio
--
http://engineeringliberty.wordpress.com
RE: Frequency of Timoshenko beam with crack
RE: Frequency of Timoshenko beam with crack
I don't have a canned answer for a beam with a crack problem; the non-linearity of the opening and closing of the crack cannot be captured with a simple linear modal analysis. You'll have to use a more complex approach: Perhaps you could use a similar approach to that which is discussed in the paper above?
//signed//
Christopher K. Hubley
Mechanical Engineer
Sunpower Incorporated
Athens, Ohio
--
http://engineeringliberty.wordpress.com