What is the best practice to model a cylindrical storage tank , with annular plate bolted to the foundation.
I want to model use the AXISYMMETRIC capabilities of ANSYS .
my issues/ questions are about:
Boundary conditions
Fixation to the ground
A small model in ANSY workbench would be very...
While checking for secondary wind girders/ rings, the EEMUA 159 and the European code EN 14015 ( both are for storage tanks) combine in one formula the Wind (thru wind speed Vw) and the external pressure (Pv) to check buckling lengths and the need of wind girders .
take care and thanks
....ooops the other attachments
take care and thankshttp://files.engineering.com/getfile.aspx?folder=be95e5bd-077e-4da2-842d-2dfc9febfd7f&file=BRACKET_max_displacment.png
I came across this problem before. And could not find something serious in the literature !!
ANSYS was conducted upon client request as the tank is an existing one, and it has to be re-assessed...
I used ANSYS workbench. Building an asymmetric model. I focused on Minimum Principal stress as...
..just of curiosity , are you stress intensities in line with for instance with ones in API 579 ? how do they compare with published values ?
..This standards has an extensive literature regarding stress intensities and their application for fitness for service purposes.
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In France , for pressure vessels the CODAP or the EN is in use
For storage tanks ( up to 60 mbar ) the CODRES ( Code de reservoir cylindriques VERTICAU et atmospheriques, a bit similar to EN 14015 is in use.
Besides you have to satisfy the several national Laws called Decrets which stipulate...
Which software has been used for ?
1/- API 579 ( the part 2 with the examples) and
2/-ASME VIII ( he 3 booklets with the examples of division one and division 2)
was it simply a text editor ? and the calculations have been made behind the "curtens" ?
or is it a formal software dedicated to...
I understood that a new edition (June 2016) has been issued ?
What are the latest changes ? topics ?
(e.g. compared to the previous edition ).
Are they additions ? and or changes or amendments ? or even some re-writing
of course the introduction in the new edition gives a very quick...
I always understood that Caesar is a linear program. To this date and in my knowledge Caesar has no Non-Linear capabilities
So for dynamic it will:
1/- make all + Y supportS Y (e.g closed in both directions.
2/- make all gaps equal to Zero.
So after modifying the supports following some...
Sajk14
thank you for answer
question: are there special calculations to do ..on the shell to take into account the loads coming from the roof and the rafters under which the roof plates are welded?
If you can insert a typical sketch or drawing regarding this type of connection
thanks again...
case: Conical cone roof with supporting structure (rafters connected to in inner ring, no column). Due to corrosive product, vapor inside the tank above the liquid level, the rafter are located OUTSIDE the roof. Rafter are welded to the roof.
Question: how is the outer part of the rafter shall...
see thread809-316272
there is a book "Guide to Storage Tanks and Equipment" the authors are Bob Langer and Bob Long , you can get it from Amazone or from this site:
http://www.ais-engineering-books.com/books/pc/viewPrd.asp?idproduct=851&idcategory=6#details
this book contains an example on...
to IFRs ..and others: so why is this uplift story is still included in the Code ? why it is there anyway ?
Have we ever had a "code case in regarding the up-lift in API650" ..what was the answer of the committee ?
why do not we have this issue of up lift with vessels..etc..
of course many...
What are the equivalent materials in EN , DIN of
A 106 gr B
A 333 gr. 6
A 105
A 350 LFE
A 234 WPB ..
What are the standard wall thickness ?
Thanks a lot
take care and thanks
