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Response of vehicle accelerating over random profile

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Summary

Certain aspects of the complex dependence on parameters of the non-stationary random response of a simple model of a vehicle to road roughness are investigated numerically. Although the method is applicable to an arbitrarily varying traversal velocity, attention has been restricted to uniformly accelerated motion. The mean square velocity response is found to be strongly dependent on acceleration and relatively independent of road roughness spectral density at low wave-numbers. The fact that the non-stationary displacement response is independent of acceleration would thus seem to be an exceptional case, since the mean square acceleration response is known to depend markedly on acceleration.

Übersicht

Gewisse Aspekte der komplizierten Parameterabhängigkeiten der durch Straßenunebenheiten erzeugten nichtstationären Zufallsschwingungen eines einfachen Modells eines Stiaßenfahrzeuges werden numerisch untersucht. Obwohl das Lösungsverfahren keine Annahmen über die Fahrgeschwindigkeit voraussetzt, wird die Untersuchung auf eine konstante Beschleunigung beschränkt. Die Ergebnisse zeigen, daß bei niedrigen Geschwindigkeiten die mittlere quadratische Ansprechgeschwindigkeit stark von der Beschleunigung abhängt, jedoch relativ unabhängig vom Spektrum der Straßenunebenheiten bei kleinen Wellenzahlen ist. Die relative Unabhängigkeit der mittleren quadratischen Ansprechverschiebung stellt einen Ausnahmefall dar, da schon bekannt ist, daß die Transportbeschleunigung einen erheblichen Einfluß auf den quadratischen Mittelwert der Ansprechbeschleunigung hat.

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Dedicated to Prof. Dr. H. Ziegler on the occasion of his seventieth birthday

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Macvean, D.B. Response of vehicle accelerating over random profile. Ing. arch 49, 375–380 (1980). https://doi.org/10.1007/BF02426916

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  • DOI: https://doi.org/10.1007/BF02426916

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