I have already posted a query to coade too.
Coade may give a general reply ,but in actual scenario what decision is to
be taken? ,can we neglect offset ?or should we make it safe with the
offset modelling?Can we model trunnion at different angle & keep the
welding of trunnion at midpoint only?In what situation we should adopt
specific modelling??
Anybody with real life experience of this problems should definitely know
the actual solution while working with Caesar.
& I feel this group members are having the reallife experience too than
just theoretical one that's why I posted a query.
You are wrong on concluding that I am guessing the solution from free
answers .Infact I look at it as a second thought from real life experience.
Yes there are lot of issues the way I modelled it & my question is intended
for the correct way of modelling which if any one knows correctly or what
they follow can explain it without much details required.You can also
explain any one example if you have with you.
The trunnion I modelled as a pipe & the trunnion at first support from the
pump is rest plus guide ( lateral stop to pump axis& pump axial direction
free).
First support at pump location are not to be anchored normally,I do not
understand what did you mean by "Did
you anchor the base."??
Regards,
Rajesh V Balapure
aluser2
<alwynk@shaw.ca> To:
<a href="/group/PipingDesign/post?postID=4t0s2b-a_P5EHpucPqqf4PN-hyC7QPYb54dIymNjnIa_MtsaZmI9c6t1XaTsd1DZ2NuI_4ssKwtyY_Z0wJB7meFK34fWMQ">PipingDesign@yahoogroups.com</a>
Sent by: cc: (bcc: Rajesh V
Balapure/JAMNAGAR/RIL)
PipingDesign@yaho Subject: Re: [PipingDesign]
Caeser-II modelling of pump reducer & trunnion.
ogroups.com Importance: Normal Sender's OU:
Reliance |------------------|
| [ ] Confidential |
|------------------|
09/07/2005 01:09
AM
Please respond to
PipingDesign
no easy answer, but you are right. These models lead to high forces and
moments
and many of the results are not realistic. Have you a rigid trunnion. Did
you anchor the base.
How are the pumps modelled. I would question any answer without knowing
these key things
I'm a bit curious why post here and not send to Coade tech support. You pay
your fees to get tech support.
Its very costly but you are paying for the advice so why not use it?..
rather than guesses fom free answers.
You can send them your model. theres a lot of issues around the way you
have
modelled it.
>
> Dear members ,
> I have one query about Caesar modelling technique for reducer & trunnion.
> For trunnion at the pump end suction nozzle or side suction pump:
> It is normally observed that high forces & moments are imposed on the
> nozzle due to the thermal expansion of the reducer offset,especially in
> case of eccentric reducer (FSU ).Similarly large variation in results
are
> seen if the trunnion connect point on the elbow is changed(say 45-41 deg.
> or 30deg.).It is also noted that many of the results are not
realistic.What
> should be the best possible method of modelling for this purpose.
>
> Regards,
> Rajesh V Balapure
>
> [Non-text portions of this message have been removed]
>
>
>
>
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[Non-text portions of this message have been removed] Received on Wed Sep 07 01:09:00 2005
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