Input a time disprgenized varying function
Input a time disprgenized varying function
(OP)
Hi everybody
I would be grateful if someone could tell how I should input a force funcrion that differs with time with no special function. The value of force at time points( t=1,1.2,1.4,1.6,...(seconds)) are known.
Another related question is that can we enter these forces from a file(foe example a note pad or excel file) the way we do in Siesmosignal program. I have an earthquake record that the values are known in every 0.02(s) time interval. The record lasts for 30 seconds and this is needs huge input. What shall I do?
Thanks for help
I would be grateful if someone could tell how I should input a force funcrion that differs with time with no special function. The value of force at time points( t=1,1.2,1.4,1.6,...(seconds)) are known.
Another related question is that can we enter these forces from a file(foe example a note pad or excel file) the way we do in Siesmosignal program. I have an earthquake record that the values are known in every 0.02(s) time interval. The record lasts for 30 seconds and this is needs huge input. What shall I do?
Thanks for help





RE: Input a time disprgenized varying function
Have you done the relevant tutorial?
try
File -> Import -> DAC/RPC III
You will need to convert your file to rsp or rpc III
Alternatively create a spline using your data - that is only 1500 elements, not actually very much.
Then you need to use that to drive your model.
Do the tutorial.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Input a time disprgenized varying function
Thank you so much for answering my question. yes. I am using view. Unfortunately I have found no related tutorial to what I want to do. do you know where I can find it? how can I change my file to rsp? and finally I know how to make a spline with my data. I do it and set units to forc-time. but when I want to use them as a force function in function-builder there is an error with this concept: your function is not a time run one.Also when I push plot botton in function builder(I can see the function but program can not accept this as a runtime function) time steps are changed. Do you know how I should solve this?
Again I appreciate your answer and apologize for asking too many question and my english. I am a beginer and english is not my native language.
Regards.
RE: Input a time disprgenized varying function
C:\MSC.Software\MSC.ADAMS\2005r2\help\mergedProjects\view_hlp\examples\view_gs.pdf
If not then I suggest you do it.
So far as data formats look at
C:\MSC.Software\MSC.ADAMS\2005r2\help\mergedProjects\view_hlp\exchange\file_formats.htm
or the equivalent on your system
also for splines
C:\MSC.Software\MSC.ADAMS\2005r2\help\mergedProjects\view_hlp\examples\spline.pdf
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Input a time disprgenized varying function
I have studied the latch and spline tutorial before. I have problem with spline tutorial. I can import a excel file as a spline and measure. And when I enter my chart as a measur I can even see the plot in postprocessing menu as a function of time. But the problem is that function builder does not accept from me, neither measur nor spline imported values, as a function of time. I choose custom for force type and go to function builder. then I choose 'all objects' from 'getting objects data' and then choose all,browse,and related spline respectively. But there is a error that says it is not a time function. The tutorial has done a kind of similar approach to make a nonlinear spring but it is too vague. It hasn,t explained how we should deal with this error. Applogize me for asking to many questions. I really need this.
Regards
RE: Input a time disprgenized varying function
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Input a time disprgenized varying function
bye