admin Slides & Video: webinar_47_SRS_synthesis_special_topics.pptx A high-range Cummins Generator in a Seismic Shaker Test.mp4 Topics: 1. Shaker Table Seismic Testing of Equipment using Historical Strong Motion Data Scaled to Satisfy a Shock Response Spectrum 2. Temporal Moments * * * Matlab script: Vibrationdata Signal Analysis Package… Read more
Slides: webinar_46_two_dof_multipoint.pptx * * * Matlab script: Vibrationdata Signal Analysis Package * * * Reference Paper: two_dof_enforced_motion_multipoint.pdf * * * See also: Two-degree-of-freedom Systems * * * – Tom Irvine .
Temporal moments are sometimes used for shock analysis. Here is a Matlab script: temporal_moments.m References: Hemez & Doebling, From SRS to Temporal Moments J. Cap & D. Smallwood, A methodology for defining shock tests based on shock response spectra and temporal moments See also: Energy… Read more
The plate is aluminum, 0.063 inch thick. The fixed edge lengths are 6 and 4 inches. The vibration mode was calculated via the Rayleigh method using an assumed displacement function, as carried out via Matlab script: fixed_fixed_fixed_fixed_plate.zip The method is given in: fixed_fixed_fixed_fixed_plate.pdf See also:… Read more
Slides: webinar_45_two_dof_trans_rot.pptx Audio/Visual File: NESC Academy Two-degree-of-freedom System with Rotation and Translation – Recommend viewing in Firefox with Sliverlight Plugin * * * Matlab script: Vibrationdata Signal Analysis Package * * * Reference Papers Sample Automobile Vibration Problem: auto.pdf Spring-Mass System Subjected to Enforced Motion:… Read more
The following scripts calculate the A, B, C, P coefficients to model a set of SN curves with varying R values: sin_curve_fit_R.zip sn_curve_fit_R.m is the main script. The remaining scripts are supporting functions. The equations are given in: sn_curvefit_equation.pdf * * * References: 1. MIL-HDBK-5J… Read more
Slides: webinar_44_sine_filtering.pptx Audio/Visual: NESC Academy Sine Filtering – Recommend viewing in Firefox with Sliverlight Plugin * * * Matlab script: Vibrationdata Signal Analysis Package * * * Please send me an Email if you would like to be on the distribution list for the webinar… Read more
Slides: webinar_43_two_dof_systems.pptx & Alternate Link Audio/Visual File: NESC Academy Two-stage Isolation – Recommend viewing in Firefox with Sliverlight Plugin * * * Matlab script: Vibrationdata Signal Analysis Package * * * Reference Paper: two_stage_isolation.pdf & Alternate Link * * * See also: Two-degree-of-freedom Systems * * * -… Read more
1.Accidental Drop Shock 2.Half-Sine Shock on Drop Tower 3.Half-Sine Shock on Shaker Table 4.Waveform Reconstructions via Wavelets Slides: webinar_42_shock_topics.pptx Audio/Visual: NESC Academy Shock Special Topics – Recommend viewing in Firefox with Sliverlight Plugin * * * Matlab script: Vibrationdata Signal Analysis Package Data Sample: shaker_halfsine.txt -… Read more
1. Band-Splitting 2. Time-Level Equivalence 3. PSD Synthesis using Sine Series PowerPoint Slides: webinar_41_psd_topics.pptx Audio/Visual File: NESC Academy PSD Special Topics – Recommend viewing in Firefox with Sliverlight Plugin * * * Matlab script: Vibrationdata Signal Analysis Package * * * Here is a brief guideline… Read more