Comments, Questions, and Answers:

Item #1:

We are analyzing harmonic load with known Frequencies and Forces. Is there a way we can convert frequency domain to time domain in order to apply time history load?

Answer: 

I apologize for the inconvenience, however AutoPIPE (v.09.06.xx.xx and lower) does not have this ability at this time. 

Item #2: Why we see no displacement at the node where an AutoPIPE Harmonic load is imposed in the same direction?

Item #3:

Where would a user get the *.HMF file required by AutoPIPE?

Answer:

The HMF file can be generated by the following sources:

a. Bentley PULS can automatically generate this file

b. Other vibration analysis software. 

c. Manually by the User,  defined from a vibration recording or other source (see AutoPIPE help for details).

Item #4:

Where in API 618 does it say to reduce allowable stress by 2? 

Answer:

The divide by 2 is because of peak to peak nature of the harmonic input. The maximum stress is half the stress range peak to peak. 

See Also

Bentley AutoPIPE

External Links

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

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