Shock Response Spectrum

The most widely used algorithm for the Shock Response Spectrum (SRS) calculation for base excitation is the ramp invariant digital recursive filtering relationship given in: David O. Smallwood, An Improved Recursive Formula for Calculating Shock Response Spectra, Shock and Vibration Bulletin, No. 51, May 1981.  The link is:  DS_SRS1.pdf Smallwood duly gave the resulting filtering [...]

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BLAS Update

It appears GotoBLAS2 has been deprecated (i.e. orphaned). The new standard is OpenBLAS. OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version. OpenBLAS is an open source project supported by Lab of Parallel Software and Computational Science, Institute of Software Chinese Academy of Sciences (ISCAS).   -Tom Irvine

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Modal Transient Analysis Numerical Engine

Modal Transient Analysis of a System Subjected to an Applied Force via a Ramp Invariant Digital Recursive Filtering Relationship: force_ramp_invariant.pdf Reference Papers: Smallwood Irvine General Coordinate Irvine Impulse Response Function 1 Irvine Impulse Response Function 2 Irvine SRS * * * * * * * * * * * SDOF Matlab Script: arbit_force.m MDOF Matlab Script: mdof_modal_arbit_force_ri.m Matlab [...]

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