God speaks to us through the Holy Scriptures. 10 And the brethren immediately sent away Paul and Silas by night unto Berea: who coming thither went into the synagogue of the Jews. 11 These were more noble than those in Thessalonica, in that they received… Read more
17 And whatsoever ye do in word or deed, do all in the name of the Lord Jesus, giving thanks to God and the Father by him. 23 And whatsoever ye do, do it heartily, as to the Lord, and not unto men; 24 Knowing… Read more
The Children of Israel were required by Pharoah to work seven days per week when they were slaves in Egypt. After they were liberated, the Lord commanded them: Remember the sabbath day, to keep it holy. (Exodus 20:8) The Lord expected the Children of Israel… Read more
“Christ” is derived from the Greek christós, meaning the “Anointed One.” This title corresponds to the Hebrew-derived “Messiah.” * * * Genesis 16 [13] And she (Hagar) called the name of the LORD that spake unto her, Thou God seest me: for she said, Have… Read more
This set of scripts calculates the response of an SDOF system to an applied force PSD. A transfer function is derived. Then its square is applied to the force PSD to calculate the response, using point-by-point multiplication and integration. sdof_ran_force.zip Important note: The following scripts… Read more
Here is a C++ program which generates random numbers for a user-selected distribution. monte_carlo_random.cpp monte_carlo_random.exe The distribution options are: 1. Uniform 2. Normal 3. Rayleigh 4. Weibull 5. Gumbel 6. Binomial The random numbers can then be used in a Monte Carlo analysis. * *… Read more
Last Sunday I gave a talk in my church at the request of my bishop. The assigned topic was “The Five Elements of Missionary Preparation,” presumably for the benefit of young men and women. I have been concerned, however, that many of our young people… Read more
There is a need to derive a PSD envelope for nonstationary acceleration time histories, including launch vehicle data, which may be similar to that shown in the above figure. A PSD can be derived using rainflow fatigue cycle counting along with a Miners-type relative fatigue… Read more
Question: What is meant exactly by “fatigue exponent”. I generally input a value between 3 (for notched parts) and 6 (for (unnotched ones). Is it right?…I’ve found confusing and contrasting definitions about b and m exponent (among MIL-STD-810 G and various other documents) Answer:… Read more
The Newmark-beta method can be used to solve structural dynamics problems in the time domain, of the form: M (d^2x/dt^2) + C dx/dt + K x = F This method performs direct integration on the mass, damping and stiffness matrices which may be fully-coupled. Here… Read more