Who can for example, this calculation

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Who can for example, this calculation

Postby mycadcae » Sat Mar 20, 2010 4:44 am

dW = (m * h * a) / t

* dW symbolising the total weight transfer due to an acceleration a (m/s²),
* a total vehicle mass m (in kg),
* h the height is the height of center of gravity,
* t is the track width. (For longitudinal weight transfer, use wheel base instead of t).

Nik Wan, Mechanical Designer, CATIA V5/ Solidworks/Autodesk Inventor/ AutoCAD

Joined: Sun Mar 15, 2009 10:59 am
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Re: Who can for example, this calculation

Postby The_Man » Sat Mar 20, 2010 6:38 am

So what are you trying to ask here?

If you want an explanation it is something like this:
m*a gives the pseudo force acting at the CG of the car.
m*a*h becomes the moment caused by the force on CG.

Division by t gives the force that is transferred to the outer wheel in order to balance the above moment.

Any basic suspension design book will explain this to you well, in further detail.
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Vehicle Dynamics FSAE 08; FS 09

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Re: Who can for example, this calculation

Postby ReubenG » Sat Mar 20, 2010 12:41 pm

1. Draw a free body diagram of the vehicle, including the weight acting at the CG, each wheels' reaction force. The inertial force is located at the CG and acts opposite to the direction of the acceleration ()

2. The two equations that need to be satisfied are balance of forces, and balance of moments. Balancing the moments is easier if you take moments about one of the wheels rather than the CG. If you want the steady state weight transfer, then the angular acceleration is zero.

What level are you studying at ?

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