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  • Users: SverkerO
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  1. SverkerO

    Modal superposition sensative to Twin modes?

    Dear all, Does anyone know if the solution to a time history load (e.g. a water hammer) solved with modal superposition method (in e.g Caesar II) is sensitive to Twin modes in a similar way as a solution using the response spectra method for floor induced loads? Best regards Sverker
  2. SverkerO

    B31.1 SIF for butt weld =1.9?

    Earlier I have mostly done ASME NC-3600 piping calculations and there the SIF for a butt weld is 1. But now as I’m about to use B31.1 I noticed that the SIF for a butt weld could be as high as 1.9 depending on the mismatch. As I do not have any specification of the mismatch i feel forced to...
  3. SverkerO

    ANSYS 13 Workbench, change default coordinate system

    In ANSYS 13 Workbench the default vertical up axis is Y. Is there away to change it to Z? The reason for asking is that I use the num keys to rotate the model. And because I use Z as vertical up in my modelling the num keys don't work as intuitive as they would if Y was vertical up. I.e. my...
  4. SverkerO

    Why are allowable component loads often given in three directions only

    Hello, Often I get in to discussion with suppliers of components about allowable component loads. The supplier often has the opinion that we piping engineers only produce bending moment and axial force at the interface to the component. Does anyone know the background to that? I always ask...
  5. SverkerO

    Import ANSYS material data into Workbench

    Hi, Is there away to import material data contained in .mac files into workbench 12? The data is given with the MP command for example MPTEMP,1,20 MPTEMP,2,50 MPTEMP,3,100 MPTEMP,4,150 MPDATA,DENS, mat1,1,7.85E-09 MPDATA,DENS, Mat1,2,7.85E-09 MPDATA,DENS, Mat1,3,7.85E-09 MPDATA,DENS, Mat1,4,7.85E-09
  6. SverkerO

    High cycle fatigue in piping

    Hello, Is there any codes or documents that gives guidance how to evaluate high cycle fatigue in piping systems. What I’m after is a procedure that originates from the nominal beam stress range and through the use of stress indices gives the stress range to enter an applicable S-N curve. Best...

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