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Title: A study of the vehicle ride dynamics aspect of ground mobility : Volume III, theoretical dynamics aspects of vehicle systems
Authors: Van Deusen, Bruce D.
Keywords: Vehicles
Publisher: U.S. Army Engineer Waterways Experiment Station
Series/Report no.: Contract Report (U.S. Army Engineer Waterways Experiment Station) ; no. 3-114, Volume III
Abstract: One of the most important aspects of ground mobility is the problem associated with riding quality. Ride refers to the study and analysis of the vibratory motions of vehicles as excited by random terrain irregularities. The problems of interpreting vehicle motions in terms of human subjective response have been covered In Volume II. The problem of obtaining terrain measurements for study Is discussed in Volume IV. The present volume is intended to define the analytical techniques necessary to predict vibration in vehicles, emphasizing transfer function characteristics and the extension of transfer function techniques to non-linear analysis. Such statistics as the power spectral density and amplitude probability distribution are discussed. Two separate approaches to the problem are described, each with certain distinct advantages. The first approach is a digital computer oriented program for steady state response prediction of vehicle motion in terms of the frequency content. In this case, linear models of the vehicle may be evaluated and results pertain exclusively to the stable ground roughness problem. This implies operation of a vehicle over randomly spaced irregularities which are somewhat consistent in roughness. This approach to the problem is the simplest and yields results useful in evaluation of riding quality of vehicles over this type of terrain. The second approach to the problem is a direct prediction of the motion of vehicles in the time domain. The computation can be performed on either analog or digital computers, however the analog approach is stressed in this report. This approach is more definitive and will permit inclusion of non-linear aspects of the vehicle. The time domain approach can be extended to study of singular obstacles, deterministic inputs, or obstacle interference problems. This approach is more general, but it requires considerably more time to investigate a given vehicle configuration and requires a rather extensive analog computer facility for realistic vehicle models.
Description: Contract Report
Gov't Doc #: Contract Report No. 3-114, Volume III
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Contract Report

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