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Field measurement and aeroelastic wind tunnel test of windinduced vibrations of lattice tower

机译：格构塔风振的现场测量与气弹风洞试验。

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摘要

Lattice towers are among the most vulnerable structures during typhoons. In this study, the wind engineering research field base near Shanghai Pudong International Airport was used to measure the mean wind speeds and directions at a height of 10 m, as well as the accelerations atop a 40-m high lattice tower during Typhoons Neoguri and Nakri to investigate the characteristics of the near-ground wind and the responses of the lattice tower. Moreover, an aeroelastic model of the lattice tower was generated by the discrete stiffness method. Using the wind tunnel test of the aeroelastic model, the root mean square accelerations of the tower were studied with different wind speeds and directions. The responses of the tower in the across-wind direction were found always higher than those in the along-wind direction, which meant the vortex shedding of each single cylinder had an impact on the responses of the tower in the across-wind direction. The test results were compared with those of field measurements to evaluate the accuracy of the aeroelastic model, and the two were generally in a good agreement. Thus, the aeroelastic model could precisely simulate the dynamic characteristics of a prototypical lattice tower using the discrete stiffness method.
机译：台风期间，格子塔是最脆弱的建筑之一。在这项研究中，上海浦东国际机场附近的风力工程研究基地被用来测量10 m高处的平均风速和风向，以及台风Neoguri和Nakri在40 m高格子塔顶上的加速度研究近地风的特征和格构塔的响应。此外，通过离散刚度法生成了格构塔的气动弹性模型。使用空气弹性模型的风洞试验，研究了在不同风速和风向下塔的均方根加速度。发现塔架在逆风方向上的响应始终高于顺风向，这意味着每个单个圆柱体的涡旋脱落都会影响塔架在逆风方向上的响应。将测试结果与现场测量结果进行比较，以评估气动弹性模型的准确性，并且两者总体上吻合良好。因此，气动弹性模型可以使用离散刚度法精确地模拟原型格架的动力特性。

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