Comparison of Wind-induced Linear and Nonlinear Responses ofa Structure of Expo Axis

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (12) : 155-159.

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Comparison of Wind-induced Linear and Nonlinear Responses ofa Structure of Expo Axis

hihui Han1; Xuanyi Zhou1;Ming Gu1;Weiyu Zhang2

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Abstract

Based on the wind pressure data from the wind tunnel test, the distributions of the displacementsand the differences of the values of a structure of Expo Axis, which are obtained linearly and nonlinearly in thetime domain, are analyzed. The results indicate that the cantilevered part of high nonlinear behavior appearsstiffness softening. Because of that, the structure stiffness decreases and the displacement increases. Thedisplacement RSM values computed nonlinearly are greater than those computed linearly, but the differences areacceptable from the viewpoint of engineering application; the comparison of power spectral density curves showssimilar energy distributions.

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wind-induced response / time domain method / geometric nonlinearity

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hihui Han;Xuanyi Zhou;Ming Gu;Weiyu Zhang. Comparison of Wind-induced Linear and Nonlinear Responses ofa Structure of Expo Axis[J]. Journal of Vibration and Shock, 2009, 28(12): 155-159