September 11, 2001

On the fateful morning of 9/11, I watched the TV news coverage of the World Trade Center attack. My mind could scarcely comprehend the unfolding tragedy as I watched each tower collapse. I later wrote an article The World Trade Center Disaster: A Shock Vibration Perspective in my November 2001 newsletter. My thoughts and prayers [...]

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Fixed-Free-Fixed-Free Plate, Fundamental Vibration Mode

  The plate is aluminum, 0.063 inch thick.  The fixed edge length is 6 inch.  The free edge length is 4 inch. The vibration mode was calculated via the Rayleigh method using an assumed displacement function, as carried out via Matlab script:  fixed_free_fixed_free_plate.m. The method is given in:  fixed_free_fixed_free_plate.pdf. The paper and script are posted [...]

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Aerospace Conference

Again, I will present a paper on my NESC shock & vibration educational materials at the Aerospace Spacecraft & Launch Vehicle Dynamic Environments Conference, in El Segundo, California, June 7-9, 2011.   I hope to meet some of you there. You may download the presentation at: Presentation Link The educational materials are available to engineers working [...]

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SpaceX Tour

Some NASA colleagues and I visited SpaceX in Hawthorne, California, on Thursday. Thanks to SpaceX engineers Sam DiMaggio and Jessica Jensen for the guided tour. We saw a Dragon spacecraft being built, as well as several rocket engines. Sam DiMaggio, who leads the loads and environments groups, said they have a policy that no margin [...]

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Welcome to Vibrationdata Blog!

Greetings, I will be posting news about my shock & vibration research and latest software and tutorials on this blog. I am currently serving as a industry representative on the NASA Engineering & Safety Center (NESC), Technical Disciplines Team for Loads & Dynamics, under the leadership of Dr. Curtis Larsen.  I am also a scientist at [...]

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