PowerPoint File: webinar_25_pyrotechnic_shock.pptx Audio Visual File: NESC Academy Pyrotechnic Shock – Recommend viewing in Firefox with Sliverlight Plugin * * * Data: rv_separation.dat – time (sec) & accel (G) * * * Matlab script: Vibrationdata Signal Analysis Package * * * Python version: webinar_25_pyrotechnic_shock_python.pptx Python… Read more
PowerPoint File: Webinar_24_Seismic_Shock.pptx Audio/Visual File: NESC Academy Seismic Shock – Recommend viewing in Firefox with Sliverlight Plugin * * * Data: elcentro_NS.dat – time (sec) & accel (G) * * * Matlab script: Vibrationdata Signal Analysis Package * * * Python Webinar_24_Seismic_Shock_python.pptx Python script: Python… Read more
PowerPoint File: Webinar_23_Classical_Shock_Pulses.pptx Audio/Visual File: NESC Academy Classical Shock Pulse – Recommend viewing in Firefox with Sliverlight Plugin * * * Matlab script: Vibrationdata Signal Analysis Package * * * Python Webinar_23_Classical_Shock_Pulses_python.pptx Python Signal Analysis Package GUI * * * See also: SRS Educational Animation See… Read more
Aerospace and military components must be designed and tested to withstand shock and vibration environments. Some of this testing occurs as qualification, whereby a sample component is tested to levels much higher than those which it would otherwise encounter in the field. This is done… Read more
Here is a sample SRS specification. The ramp is a constant velocity line with slope = 6 dB/octave. SRS Q=10 fn(Hz) Peak Accel (G) 10 10 2000 2000 10000 2000 Here is a set of files which satisfy the SRS. ASCII text: srs2000G.zip The files… Read more
Shock and vibration environments produce dynamic stresses which can cause material failure in structures. The potential failure modes include fatigue, yielding, and ultimate stress limit. F.V. Hunt wrote a seminal paper on this subject, titled “Stress and Stress Limits on the Attainable Velocity in Mechanical… Read more
Testing to Shock Response Spectrum (SRS) specifications is usually performed using complex oscillating waveforms. This is also true for analytical simulation in the time domain. There are several reasons for this. Complex oscillating pulses can typically meet both the positive and negative SRS for a… Read more
Consider a single-degree-of-freedom system subjected to base excitation where the input is an arbitrary time history. The response of the system can be calculated via a digital recursive filtering relationship, which is the numerical engine embedded in the SRS calculation. This is done for… Read more
I will be teaching two tutorial sessions at: 84th Shock & Vibration Symposium November 3-7, 2013 Atlanta, GA The sessions are: Shock Response Spectra and Time History Synthesis Rainflow Cycle Counting for Random Vibration Fatigue Analysis You are invited to participate. Further information is given… Read more
