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Calculate the single wheel load, inflated at 1.25 MPa, that would require the same pavement – this is the Derived Single Wheel Load (DSWL) The ACN is defined as twice the DSWL, expressed in thousands of kilograms; Procedure for the calculation of ACN
The axle load of a wheeled vehicle is the total weight bearing on the roadway for all wheels connected to a given axle.Axle load is an important design consideration in the engineering of roadways and railways, as both are designed to tolerate a maximum weight-per-axle (axle load); exceeding the maximum rated axle load will cause damage to the roadway or railway tracks.
The most common example is probably the 4×4 configuration. 6×4*4 is the chassis configuration for a vehicle with six wheels where four wheels are driven, in addition, the two front wheels as well as the rearmost two wheels are steered. In this case it is a three-axled vehicle. Often the formula A × B × C is used.
In the EU a tractor can generally have 10 tonnes (22,000 lb) on a single axle, with suspension type and number of tires often allowing slightly higher loads. In the U.S. weight restrictions are generally 20,000 pounds (9,100 kg) on a single axle, and 34,000 pounds (15,000 kg) (less than two single axles) on a tandem.
Wheel bearing rolling resistance is lowest with high axle loads and intermediate speeds of 60–80 km/h with a Crr of 0.00013 (axle load of 21 tonnes). For empty freight cars with axle loads of 5.5 tonnes, Crr goes up to 0.00020 at 60 km/h but at a low speed of 20 km/h it increases to 0.00024 and at a high speed (for freight trains) of 120 km/h ...
The Federal Bridge Gross Weight Formula, also known as Bridge Formula B or the Federal Bridge Formula, is a mathematical formula in use in the United States by truck drivers and Department of Transportation (DOT) officials to determine the appropriate maximum gross weight for a commercial motor vehicle (CMV) based on axle number and spacing ...
Weight transfer and load transfer are two expressions used somewhat confusingly to describe two distinct effects: [1] the change in load borne by different wheels of even perfectly rigid vehicles during acceleration; the change in center of mass (CoM) location relative to the wheels because of suspension compliance or cargo shifting or sloshing
There are two different types of load impact systems; single-mass and double-mass. [1] [2] In a single-mass system, a weight is dropped onto a single buffer [clarification needed] connected to a load plate, which in turn rests on the surface being tested. Single-mass FWDs are typically smaller, faster and less expensive but, when used on soft ...