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Machine Foundation Analysis Software

Machine Foundation Analysis Software

Machine Foundation Analysis Software

(OP)
Hi All:

Can you tell me if you know some software for machine foundations design which considers standars and criteria for reciprocating machine vibration, dynamic analysis, impact and things like that?

I tried to find something but it had been impossible.

Thank you for your help.

Cheers.

MARIO GALVEZ (from Brisbane, Australia).

RE: Machine Foundation Analysis Software

The book FixedEarth recommends is excellent.

RE: Machine Foundation Analysis Software

most reciprocating compressor foundation in my field are designed using in house excel programs based on arya's book

RE: Machine Foundation Analysis Software

(OP)
Thank you all:

I made my own excel spreadsheet, and I have reasonable results, nevertheless my question is if you know some software which can do the same analysis?

There exists something like that?

Thank you for your help and your comments.

Cheers.

RE: Machine Foundation Analysis Software

The Arya/O'Neill/Pincus book solves the problem by assuming the foundation is totally rigid (relative to the softness of the soil).  It then reduces the dynamic behaviour of the foundation to five uncoupled degrees of freedom (X,Y,Z,XX,YY).  These are then trivial to solve as five separate SDOF problems.

Mfgalvez, if you are looking for pre-written software for the first part of this (the reduction of the problem to five uncoupled degrees of freedom, allowing for such things as depth of embedment), I am not aware of any.  But, if I recall correctly, the book gives some references so you can check back to the original research for the formulae used.  If it is the second part that you want a pre-written program for, almost any structural analysis program with a dynamic capability will do it for you (unless it falls over because the problem is over-trivial for it).

Two comments on the method.  Firstly, Arya/O'Neill/Pincus do not spell out how you need to combine the motions of the five DOFs to come up with your estimate for the actual motion at any given point.  This is very easy, but it still needs to be done.  Secondly, the method assumes no coupling, ie the five DOFs are completely independent of each other.  If you want to be thorough, you need to investigate possible coupling between X & YY, and between Y & XX.  A method for this can be found between the two books:
»  "Foundations for Machines: Analysis and Design", by S.Prakash and V.Puri, John Wiley & Sons, 1988, in its chapter 6;  and
»  "Foundation Analysis and Design", by J.E.Bowles, McGraw-Hill, 1977, in its section 20-8.

Disclaimer.  I have a deep affection for the Arya/O'Neill/Pincus book because the very first spreadsheet I ever wrote was one implementing this method.
 

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