Methods and apparatus to design a wheel of a multiple-axle vehicle
First Claim
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1. A method to analyze fatigue damage values of wheels each to be installed at a number of axle positions on a vehicle, comprising:
- (a) simulating installations by randomly determining the axle positions of each wheel on the vehicle;
(b) determining at each of the axle positions for each wheel a fatigue damage value for each of a plurality of critical locations at the wheel during an installation;
(c) storing the fatigue damage values of the critical locations for each installation;
(d) summing the respective retained fatigue damage value for each critical location to determine a respective total fatigue damage value;
(e) repeating (a), (b), (c) and (d) a number of times to obtain at each of the critical locations a distribution of total fatigue damage values; and
(f) determining whether or not at least a subset of the total fatigue damage values at each of the critical locations exceeds a respective threshold total fatigue damage value.
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Abstract
Methods and apparatus to design a wheel of a multiple-axle vehicle are disclosed. A disclosed method analyzes fatigue damage values of wheels, each to be installed at a number of axle positions on a vehicle, and includes determining for each wheel a fatigue damage value for each of a plurality of critical locations at the wheel during an installation and determining whether at least a subset of total fatigue damage values at critical locations for each wheel installation exceeds a respective threshold total fatigue damage value.
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Citations
20 Claims
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1. A method to analyze fatigue damage values of wheels each to be installed at a number of axle positions on a vehicle, comprising:
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(a) simulating installations by randomly determining the axle positions of each wheel on the vehicle; (b) determining at each of the axle positions for each wheel a fatigue damage value for each of a plurality of critical locations at the wheel during an installation; (c) storing the fatigue damage values of the critical locations for each installation; (d) summing the respective retained fatigue damage value for each critical location to determine a respective total fatigue damage value; (e) repeating (a), (b), (c) and (d) a number of times to obtain at each of the critical locations a distribution of total fatigue damage values; and (f) determining whether or not at least a subset of the total fatigue damage values at each of the critical locations exceeds a respective threshold total fatigue damage value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus to analyze fatigue damage values of wheels each to be installed at a number of axle positions on a vehicle, comprising:
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(a) an axle position generator to simulate random determinations of the installed axle positions of each wheel on the vehicle; (b) a fatigue damage value generator to obtain the positions of each wheel from the axle position generator to determine at each of the axle positions for each wheel a fatigue damage value for each of a plurality of critical locations at the wheel during an installation, to store the fatigue damage values of the critical locations for each installation, to sum the respective retained corresponding fatigue damage value for each critical location to determine and store a respective total fatigue damage value, and to store total fatigue damage values of a distribution of respective total fatigue damage values obtained from repeating the summing of the fatigue damage values, and (c) a comparator to determine whether or not at least a subset of the respective total fatigue damage values at a critical location exceeds a respective threshold total fatigue damage value for the wheel. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A computer-readable medium storing computer readable instructions which, when executed by a computer, causes the computer to:
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(a) simulate installations by randomly determining the axle positions of each wheel on the vehicle; (b) determine at each of the axle positions for each wheel a fatigue damage value for each of a plurality of critical locations at the wheel during an installation; (c) store the fatigue damage values of the critical locations for each installation; (d) sum the respective retained fatigue damage value for each critical location to determine a respective total fatigue damage value; (e) repeat (a), (b), (c) and (d) a number of times to obtain at each of the critical locations a distribution of total fatigue damage values; and (f) determine whether or not at least a subset of the total fatigue damage values at each of the critical locations exceeds a respective threshold total fatigue damage value.
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Specification