Numerical simulation of plate-type debris considering mass eccentricity

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (20) : 26-34.

HUANG Peng，ZHOU Hualiang，LI Ziyu，LIN Huatan

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Abstract

Windborne plate-type debris is one of the main factors causing damage to the building envelope in wind disasters, and there are usually mass eccentricities due to factors such as uneven materials. A numerical motion model of plate-type debris considering mass eccentricity was established, and the flight attitudes, trajectories and velocities of the debris under the influence of different centroid positions and initial wind attack angles were studied, and the influence of debris with eccentric mass on the crowds and buildings was analyzed. The results showed that the model is accurate and efficient, and can be adapted to the rapid simulation of plenty of debris with different initial parameters; mass eccentricity exacerbates the reverse flip of the plate-type debris in motion, and the rotation dissipates the translational energy thereby reducing the velocity of the impact; during takeoff, the center of mass is biased down, and the debris generally falls faster, while a higher center of mass is more likely to cause the trajectory to be dispersed; moreover, the mass eccentricity is critical to the attitude of the debris impacting the building envelope.

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plate-type debris / mass eccentricity / flight attitude / flight paths / numerical methods

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HUANG Peng, ZHOU Hualiang, LI Ziyu, LIN Huatan. Numerical simulation of plate-type debris considering mass eccentricity[J]. Journal of Vibration and Shock, 2024, 43(20): 26-34

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