Load Calc Analysis for a Ladder Frame - Get Help Now

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The discussion focuses on load calculations for a ladder frame chassis, specifically how vehicle weight at the center of gravity (Cg) is distributed along the frame and its effect on cross members. The user seeks guidance on performing these calculations without relying on analysis software. It is noted that uneven road conditions can create torque or twisting in the cross members, complicating the load distribution. A suggested approach involves using a dynamic amplification factor (daf) to determine weight distribution based on the distance of the Cg from the frame members and creating a free-body diagram for analysis. Detailed specifications such as dimensions and material properties are essential for accurate calculations.
the4thworld
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Hey i would really appreciate it if someone could help me with the load calculations in a chassis.
The frame is basically a ladder frame, 2 C section side rails and cross members.
Would like to know how the weight of the vehicle acting at the Cg gets distributed along the frame. And how does this weight effect the cross members.
And apart from using an analysis software, how would i go about doing this.

Thanks

This is basically what the frame looks like
http://tinypic.com/r/20glmc1/5"
 
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Considering the vehicle travels over uneven roads, thus causing one side rail to be lifted while the other remains the same, this would cause a torque or twist in the cross member.Any idea how i could go about calculating this??
 
the4thworld: You could assume the vehicle weight (multiplied by a dynamic amplification factor, daf) is distributed proportional to the distance of the CG from a member. Then you can draw a free-body diagram to analyze a particular member. However, your given question does not define where the vehicle weight would be applied to your four (or two) members, nor does it give dimensions, cross-sectional dimensions, material, wheel locations, nor daf.
 
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