Hi All,

I have got some quries regarding the Dynamic Analysis

1. DLF SPECTRUM GENERATOR
For carrying out the spectrum analysis, we give the time Vs. Force data & the DLF generator generates freq Vs Load factor table.

What is the formula used to calculate the freq. & Load factor.
What is the effect of the input “ ENTER THE MAXIMUM TABLE FREQUENCY(Hz)” on the analysis.

What is the effect of the input “ ENTER THE DESIRED NUMBER OF POINTS IN THE TABLE” on the analysis.

2. What is the equation of motion for Spectrum analysis (Seismic/Water Hammer/Safety Valve Relief).
Like for Harmonic analysis the equation of motion is

M*d2x/dt2 + C* dx/dt + K*x = F Sin (wt+Q)

Similarly, What is the equation of motion for spectrum analysis.

The dynamic input to do the spectrum analysis, we give the time Vs. Force data & the DLF generator generates freq Vs Load factor table.

How these generated freq. And Load factors are applied on the system( pl. explain by means of the equation of motion, similar to the one shown for the harmonic analysis).

3. What is Mass Participation Factor. What is its significance with respect to the analysis.

4. Can you pl. Suggest some good reference book regarding dynamic analysis of piping system.

Regards,