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  • Users: Bobfromoh
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  1. Bobfromoh

    High Pitch Sound Isolation

    Not sure where to post this but I'll start here? This is actually a question concerning hobby items: neon lights on a toy HO scale train display with a power supply that causes high pitched annoying noise. I have four picture displays connected to one power supply. It doesn't matter though, one...
  2. Bobfromoh

    WN nozzle joint efficency

    I would like to know how the nozzle joint efficiency value affects the analysis results. I am using COMPRESS (but could be any package). There is a 14" 150# WN nozzle, XS neck, SA-106-B material. 19" OD x 3/8" thick pad. Shell is 48" Dia x 3/8" thick. SA-516-70 pad and shell. Design is 50 psi...
  3. Bobfromoh

    Add studding pad

    I have a 10' diameter CS API 650 tank, flat bottom. It's about 15 years old. Customer wants to put a 6" studding pad (thru a vertical weld)located about 6" from the bottom plate. There is no information on this type of connection. Does it still need a repad added? Can it just be welded in or...
  4. Bobfromoh

    Evaluate Geometry

    I am using SW2016. I created a "T" section in Sketch. I selected "Evaluate" to determine the section properties (Ixx, Iyy, centroid, etc). Some of the MOI show a small number but should be "0". One of the results, "Angle between principal axes and sketch axes" shows a none zero number. I guess...
  5. Bobfromoh

    Plot Error?

    I'm using SW 2016. I use a third party software to generate solid models. The attached Plot1 is what should be plotted, but I get what is shown on Plot? The bottom picture is what it should look like. The top picture is what I get. I may have changed some switches somewhere by mistake? The...
  6. Bobfromoh

    point force

    I am using SW 2016. I am kind of new to this software. I have a lift lug that I have been trying to apply a force. I don't understand the bearing force at all. I see that I can also use a nonuniform distributed load which I haven't tried yet. What I want to know is can I apply a point load? Can...
  7. Bobfromoh

    Angular Dimensions

    I am new to Solidworks. I am using the 2016 edition. I am trying to locate holes in a circular flange. When placing a bolt hole near the edge, the linear dimension are active. I could figure out the X-Y coordinates but I would like to use the radius and an angle to locate the first hole. How do...
  8. Bobfromoh

    Variable compression

    How practical will a variable compression engine be? Seems kind of fragile. http://jalopnik.com/worlds-first-variable-compression-ratio-engine-could-ki-1785295848
  9. Bobfromoh

    Model not tied down

    I am using Creo 3/Simulate. A model is made in third party software of a 120" diameter pressure vessel consisting of four 88" long cylinders with dished heads on the ends. It seems to import into Creo ok but fails to run because the cylinders won't connect to each other. How can I get the...
  10. Bobfromoh

    Bolting in Axisymmetric model

    Using Creo 3/Simulate. I am trying to model a circular bolted flange as an axisymmetric model. How do you model the bolting to get an accurate cross section area? The flange and connecting piping cover 360 degrees continuous but the bolting is intermittent. Do the bolts have to somehow be...
  11. Bobfromoh

    Vibration Limits

    I am trying to figure out how to specify an acceptable limit when I do a dynamic analysis on a structure. For instance, there is a beam supported at the ends. Someone walks across the beam that is very flexible. The person walking on the beam bounces too much. So the beam is made stiffer until...
  12. Bobfromoh

    Heat Transfer

    Does anyone know if Simulation can be used in heat transfer to apply a convection coefficient and a radiation coefficient on the same surface at the same time. This is for use on mechanical parts (not fluid flow)
  13. Bobfromoh

    Radiation heat transfer

    I'm using Creo 3. Where does the software hide the Stefan-Boltzmann constant? Setting up the model, all I can see is temperatures and emissivity.
  14. Bobfromoh

    Thermal anaysis

    I'm using Creo 3. I have a pipe section with 800F inside temperature, out side is 100F ambient. On the outside is a convection heat transfer and there should also be radiation heat transfer but I can't seem to assign both conditions to the same analysis. How are the two combined?
  15. Bobfromoh

    Importing Solid Model

    I use Creo 2. I have third party software that generates a solid model suitable for exporting. There are many parts to the model. However, when I import the model to Creo, it's just one piece. Is there a way to separate the components? I don't need all components separated, just a few like when...
  16. Bobfromoh

    Modeling a Repad

    I have a spherical tank with nozzle connections. The nozzles have reinforcing pads. I con't know how to make the repad. Is there a tutorial somewhere that might help explain the steps to adding repads to a solid model. The repad has to conform to the base metal shape. I checked the internet...
  17. Bobfromoh

    Specify view foe datum plane

    I'm in Creo 2. I imported a cylindrical model (.sat) but only the geometry (feature lines)shows in the isometric view in Creo. There is no coordinate system, axis or datum planes. I created these items but there is no other views in the tool bar (top, right, etc). How can i create the views so...
  18. Bobfromoh

    304L SS Design Temperature

    I have a vessel that has to be designed for a cold temperature lower than the -320F limit (-350F). The vesel is small, 36" diameter, vacuum design pressure. Is there guidance in the ASME Code to qualify this material when it gets that cold? Thanks,
  19. Bobfromoh

    Tank sloshing

    I'm not even sure what question to ask? The customer has a large diameter water filled tank. the seismic design has to include sloshing-convective and impulsive used to determine the effective mass. These components will be combined with SRSS. I have ASCE7-05 available to do the seismic analysis...
  20. Bobfromoh

    COSMOS Output Files

    I have a calculation on an Excel spread sheet that uses the data from the results of a COSMOS analysis. I was wondering if anyone can post an example of the geometry and stress files with a .csv extension. This extension may be from an older version? I'm thinking these files would be in text...

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