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Beam Bending Supported on Both Ends Loaded Two equal loads equation.
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Posted by: Milan

11/30/2004, 10:47:00

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I have been using beam analysis equations like the ones on this web
site to size beams for the construction of truck scales.  I have a
few questions about their application and accuracy. I would like to
start by asking about the source.  They look like the same equations
that are in the Machinery's Handbook.  I really don't care but I am
curious. I am using the "Beam Bending Supported on Both Ends Loaded
two Equal Loads" equation to simulate a tandem axle on platforms of
various lengths depending on the scale application.  I think this one
most closely applies to the problem. When I'm entering the values for
Ix and I require 6 main beams I have been using the total axle load of
17,000kg and multiplied the value of Ix time 6.  This is the logical
approach?  Please confirm.  I run into some problems but will elaborate
when I get a response to the initial questions.






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Re: Beam Bending Supported on Both Ends Loaded Two equal loads equation.
Re: Beam Bending Supported on Both Ends Loaded Two equal loads equation. -- Milan Post Reply Top of thread Forum
Posted by: Cragyon
Bart
11/30/2004, 14:49:39

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I agree, that the beam equations are the same as those within Machinery.

I don't think you can just multiply the number of beams Ixx perspectively. I suggest you treat each axle separately with the known moment of inertia of that axle.  You will have to determine the actual load realized by each axle to perform the calculations.  I hope you have a significant margin of safety designed in.

In general, I would simplify your load conditions/axles and calculate worst case for each. 







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