hi, guys, i need to do free vibration of the natural frequency of the structure and my structure i need to create a lumped mass in top of the structure i solve it can anyone from technical people can review and say what i have done is right or wrong here?
100MCONCTOWER QUASI(FREQUENCY)1STD.STD
Hi there,
I think you are asking the wrong question. The people in this forum is here to provide guidance rather than to tell someone is right or wrong. I think you should be the one asking the question yourself. Since at the end of the day, you will be the one who will take responsibility for the results.
if you are unsure how to model something, you should perhaps read the help, try the verification manual, run simple examples in order to gain confidence on what you are trying to model.
Perhaps you could try to run a simple model like the one in the webpage and check the Staad results against the analytical equation below.
take a look at http://vlab.amrita.edu/?sub=3&brch=175&sim=1080&cnt=1
Good luck
ok i know mr.silva whether u have any reference model how to do lumped mass in staad so that i can work out accordingly
here is a simple example based on the webpage I provided earlier.
Cantilever Tower Frequency.STD
thanks for sharing the std and now my question why u consider y as -1 (because of self wt ) or either some other reason and my case i need to do lumped mass on top (250 ton) so kindly suggest for that
2. mass participation is lesser than 80% in that std file