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Moving load on initially stressed thick plates attached together by a flexible core

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Summary

Vibrations of an infinitely long, prestressed double strip-plate system are studied analytically. The plates are attached together by a flexible core and one of the plates is subjected to a line load which moves with a constant speed along the plate. The constant, uniform prestresses are parallel to and perpendicular to the infinite edges of the plates. The solution is presented within the framework of a plate theory which includes the effects of shear deformation and rotary inertia. Critical characteristic parameters of the system are defined. An example is provided where the bending moments of the plates are calculated. From the results of theoretical analysis, it becomes evident that the prestresses in the system have considerable effect upon the dynamic behaviour of the system.

Übersicht

Die Schwingungen eines unendlichen, vorgespannten Doppelplattenstreifensystems werden für den Fall analysiert, daß die Platten durch einen biegsamen Kern verbunden sind, und daß eine Linienlast au einer Platte angreift, die sich mit konstanter Geschwindigkeit entlang der Platte verschiebt. Die konstanten, gleichmäßigen Vorspannungen sind parallel zu und senkrecht zu den unendlichen Rändern der Platten. Die Lösung wird im Rahmen einer Plattentheorie gegeben, die die Wirkung der Schubverformung und die Drehträgheit berücksichtigt. Die das System charakterisierenden kritischen Parameter werden definiert. In einem Beispiel werden die Biegemomente der Platten ermittelt. Die Ergebnisse zeigen, daß die Vorspannungen auf das dynamische Verhalten des Systems erheblichen Einfluß haben.

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References

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  3. Mindlin, R. D.: Influence of Rotary Inertia and Shear on Flexural Motions of Isotropie, Elastic Plates. J. Appl. Mech. 18 (1951) 31–38

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The author wishes to acknowledge the consistent guidance and encouragement of Professor H. Saito of Tohoku University.

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Chonan, S. Moving load on initially stressed thick plates attached together by a flexible core. Ing. arch 48, 143–154 (1979). https://doi.org/10.1007/BF00537268

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  • DOI: https://doi.org/10.1007/BF00537268

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