Healing from Soul Wounds
And the spirit and the body are the soul of man. Doctrine & Covenants 88:15 * * * Mark 5 [1] And they came over unto the other side of the sea, into the country of the Gadarenes. [2] And when he [Jesus Christ] was… Read more
Welcome!
This is the beginning of my scriptural teaching blog. Scriptures will be taken from the Holy Bible, the Book of Mormon, Doctrine & Covenants, and other sacred texts. The posts will include commentary. The purpose is to give glory to Jesus Christ, who is Yeshua… Read more
Python
I had the opportunity today to speak with several engineers from the Aerospace Corporation. They said that their organization is beginning a gradual transition from Matlab to Python. Python is an interpreted, interactive, object-oriented, open-source programming language. In addition, numerical library functions are available for Python.… Read more
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:… Read more
Sound-induced Vibration of a Cylindrical Shell
Here is a survey question. NASA-HDBK-7005(2001) gives the Franken method as a semi-empirical method for predicting the vibration response of a cylindrical skin to an acoustic pressure field, via extrapolation. Franken originally published this method in 1962 based on rocket engine static test fire data.… Read more
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… Read more
Model Correlation
This week I participated in an NESC conference in Los Angeles. One of my colleagues brought up the following point. Finite element models are created to represent physical models for analysis purposes. The finite element model natural frequencies can then be compared to data from… Read more
Acoustic Sound Pressure Levels
I recently had a need to compare sound pressure levels (SPLs) on the inside of payload fairings for a number of launch vehicles. These levels are readily available in online user’s guide for vehicles such as Atlas, Delta, Falcon, Ariane and others. The most critical… Read more
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… Read more