GGSD Program Details for SPECTR

SPECTR

Category	Dynamics (behaviour and earthquake)
Platform	DOS
Status	Public domain
Description	Spectra Response Analysis. SPECTR evaluates dynamic response spectra at various periods and presents the results as a log-log plot. On the basis of a given time-acceleration record, the program numerically integrates the normal convolution time integral for various natural periods and desired damping ratios. Relative displacements, relative and pseudo-relative velocities, absolute and pseudo-absolute accelerations are computed for natural periods from .01 seconds to 100 seconds. The program provides tables of displacement, velocity, and acceleration values with three measures of spectral intensity. A printer plot of desired damping ratios of the pseudo-relative velocity vs. natural period is presented on a 2 inch by 2 inch log-log grid.
Cost	Free on WWW
Data formats supported	None stated
Supplier in United States of America	NISEE - University of California, Berkeley