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#33423 - 02/28/10 10:36 PM More than 4 saddle
Shabeer Offline
Member

Registered: 12/26/07
Posts: 266
Loc: india
Dear all,

i have to analysis horizontal vessel for 6 number of saddle.
i have some problem while running the Pvlite software.

please make sure the morethan 4 saddle is possible.

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#33429 - 03/01/10 07:28 AM Re: More than 4 saddle [Re: Shabeer]
Ray_Delaforce Offline
Member

Registered: 01/02/03
Posts: 743
Loc: Houston, TX
Hello Shabeer

The method we use for more than two saddle supports is an approximation. We should really design the shell as a continuous beam with supports that do not subside. We have not done that yet in PV Elite, but is on our list of things to do. We limited the design to 4 saddles as the method is not strictly accurate.


Edited by Ray_Delaforce (03/01/10 07:29 AM)
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Sincerely,
Ray Delaforce
CADWorx & Analysis Solutions
Hexagon PPM

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#33486 - 03/03/10 05:53 AM Re: More than 4 saddle [Re: Ray_Delaforce]
Shabeer Offline
Member

Registered: 12/26/07
Posts: 266
Loc: india
Dear ray,

how i analysis in Pvlite,give some guidance whether it's possible to do. please find the attachment

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#33515 - 03/04/10 07:30 AM Re: More than 4 saddle [Re: Shabeer]
Mak Offline
Member

Registered: 12/12/08
Posts: 82
Loc: india
Hi shabeer,
more than four saddles r not yet possible in PVElite, however u should have to do it manually considering the vessel as a continuous beam & the UDL is acting over it & any other attachment at any point on the vessel. then resolve the forces to get loads at supports. once u will get these reactions, further is to apply zick analysis.
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Regards,
Makrand Sakpal
Contact No: - 9967949656

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#33520 - 03/04/10 10:26 AM Re: More than 4 saddle [Re: Mak]
Ray_Delaforce Offline
Member

Registered: 01/02/03
Posts: 743
Loc: Houston, TX
The method suggested by Mak is a solution, but analysing the vessel as a continuous beam is a little tedious. There is a method known as 'Moment Distribution' also known and the 'Hardy Cross' method. This is an iterative process to get the moments and forces. Excel lends itself to this method. However, you will probably have to get hold of a structures book that describes this method.

The method was used by engineers before the advent of the computer to analyse structures that did not have pin jointed elements such as portal frames.

Alternatively, if you have more than four saddles, you can break up the model into sections. This method is not as accurate, but you can get a reasonable answer.

_________________________
Sincerely,
Ray Delaforce
CADWorx & Analysis Solutions
Hexagon PPM

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#33535 - 03/05/10 07:02 AM Re: More than 4 saddle [Re: Ray_Delaforce]
Mak Offline
Member

Registered: 12/12/08
Posts: 82
Loc: india
HI ray,

can u plz send me the literature of 'Moment Distribution' and the 'Hardy Cross' method.
I will be highly appreciate u r response.
my Email-id is makrands9@gmail.com
_________________________
_________________________
Regards,
Makrand Sakpal
Contact No: - 9967949656

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#33537 - 03/05/10 07:42 AM Re: More than 4 saddle [Re: Mak]
Ray_Delaforce Offline
Member

Registered: 01/02/03
Posts: 743
Loc: Houston, TX
Ok Mak

I need you email address. Send me an email at techsupport@coade.com and mark it for my attention.
_________________________
Sincerely,
Ray Delaforce
CADWorx & Analysis Solutions
Hexagon PPM

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#47360 - 02/22/12 12:18 AM Re: More than 4 saddle [Re: Shabeer]
Dijin Offline
Member

Registered: 09/21/11
Posts: 8
Loc: United Arab Emirates
Hi,
Pls share the Moment Distribution' and the 'Hardy Cross' method documents.

Regards
Dijin.

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#47755 - 03/13/12 10:25 AM Re: More than 4 saddle [Re: Shabeer]
Mak Offline
Member

Registered: 12/12/08
Posts: 82
Loc: india
send me test mail on my e-mail ID, i will send it to you.
_________________________
_________________________
Regards,
Makrand Sakpal
Contact No: - 9967949656

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