Here is a simple example of running racron. The program reads
ASCII data from the file specified on the command line, or from standard
input if no file or - is specified. The data is numbers
separated by whitespace. An example `datafile' would be:
0 0.5665 0.30 0.012 -0.23 0.5623
Suppose that the above values represent an external force at a 0.1 seconds time-step, acting on a linear SDOF system with a 0.6 seconds natural period and 0.32 kg mass. To calculate its response with the default integration method, you could do:
racron datafile -i 0.1 -p 0.6 -m 0.32
The result you would get with the above command is:
TIME, RD, RV
----, --, --
0.0000, 0.000000e+00, 0.000000e+00
0.1000, -1.072402e+00, -2.144803e+01
0.2000, -3.914776e+00, -3.539947e+01
0.3000, -5.581327e+00, 2.068456e+00
0.4000, -2.645944e+00, 5.663920e+01
0.5000, 2.218572e+00, 4.065113e+01
0.6000, 3.353678e+00, -1.794902e+01
0.7000, 5.479004e-01, -3.816654e+01
0.8000, -2.631062e+00, -2.541272e+01
0.9000, -3.479361e+00, 8.446758e+00
1.0000, -1.354081e+00, 3.405883e+01
1.1000, 1.849025e+00, 3.000329e+01
1.2000, 3.382874e+00, 6.736932e-01
1.3000, 2.002672e+00, -2.827773e+01
1.4000, -1.028647e+00, -3.234866e+01
1.5000, -3.090919e+00, -8.896767e+00
1.6000, -2.469261e+00, 2.132993e+01
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