Tapered buildings have been widely built in recent years and its aerodynamic performance remains unclear and would be much different from that on traditional buildings. In this paper, unsteady pressures on a tapered test model under different wind speeds and amplitudes of oscillation were sampled during forced vibrations. Wind pressure distributions and unsteady force coefficients on the test model were analyzed. It demonstrated that the root mean square lift coefficient increases significantly with amplitudes of oscillation at low wind speeds, while at high wind speeds, the influence of structural oscillation is significantly reduced and the aerodynamic force is in a quasi-static state. This conclusion was discussed and confirmed in the subsequent analysis of power spectral densities and Strouhal numbers. Finally, the aerodynamic damping of the test model was identified and the effects of wind speed and amplitude of oscillation on the result were analyzed. This study has not only advanced our understanding of unsteady aerodynamic characteristics on tapered prisms, but provided a forced vibration test technique used in wind tunnel.

近年来，锥形建筑被广泛地建造，其空气动力学性能仍然不清楚，并且将与传统建筑大不相同。在本文中，在强迫振动过程中，在不同风速和不同振幅的情况下，对锥形测试模型上的非恒定压力进行了采样。分析了测试模型上的风压分布和非定常力系数。结果表明，在低风速下，均方根升力系数随着振荡幅度的增加而显着增加，而在高风速下，结构振荡的影响显着减小，并且空气动力处于准静态状态。在随后的功率谱密度和Strouhal数分析中讨论并证实了这一结论。最后，确定了测试模型的空气动力学阻尼，并分析了风速和振荡幅度对结果的影响。这项研究不仅增进了我们对锥形棱柱上非定常空气动力学特性的理解，而且提供了用于风洞中的强制振动测试技术。