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sbugros6-Contributor
6-Contributor
December 7, 2011
Question

add a "weight" to a part instead of adding a "density"

  • December 7, 2011
  • 3 replies
  • 2357 views
Is there a way to add a "weight" to a part instead of adding a "density"
for the Mass Prop to calculate the weight? Some vendor parts we download
are not solid therefore the calculation from the density is not
accurate.


Thanks



Steve




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    3 replies

    D
    DonSenchuk12-Amethyst
    12-Amethyst
    December 7, 2011

    Yes,


    Edit > Setup > Mass Props


    Change the pull-down menu from Geometry to Geometry and Parameters


    Pick the Edit button.


    Enter the weight in the Mass field.


    Pick the OK button.


    Now when you pick Generate Report you'll see the value you entered.


    Apparently the value entered through Edit > Setup > Mass Props is the Alternate Mass Prop, rather than the Reported Mass Prop. You'll have to go through a bit of extra shenanigans if you want the value reported in Analysis > Model > Mass Properties to show the entered value. This becomes important if, for example, you're using a format that is pulling a weight from the the Reported Mass Prop (pro_mp_mass)


    Go to your assigned material and remove the density.


    Enter this in your relations:
    for the Mass Prop to calculate the weight? Some vendor parts we download
    are not solid therefore the calculation from the density is not
    accurate.


    Thanks



    Steve



    A
    amedina1-Visitor
    1-Visitor
    December 8, 2011
    Interesting topic. Yeah how is everyone dealing with this. I tell the users
    to use our base "zero mass" material and to adjust the density until the
    mass is correct. Obviously with a sheet-body model one has to create a box
    solid inside of it or otherwise solidify it for this to work. I instruct my
    users to use the spec for the asm/part to set the mass appropriately.
    Maybe someone out there has a map key or script that automates some of this
    stuff?

    regards,

    Alfonso

    P
    ptc-20323221-Visitor
    1-Visitor
    December 8, 2011
    This was my reply to the original post:

    Hi Steve,

    Create the following parameter:

    actual_weight (or whatever you want to call it) & input the "actual weight"
    of the part

    Add the following relation to your part:

    mp_density=actual_weight/mp_volume(")

    run mass properties & regenerate twice

    Brian Hasinger
    Mechanical Designer
    AIDA-America Corp.
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