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Health monitoring of fluid dampers for vibration control of structures: experimental investigation

机译：用于结构振动控制的流体阻尼器的健康监测：实验研究

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This paper presents results from a comprehensive experimental program on medium-size and large-size fluid dampers in an effort to extract their force output during cyclic loading by simply measuring the strain on the damper housing and the end-spacer of the damper. The paper first discusses the stress path within the damper and, subsequently via the use of linear elasticity, shows that the experimental data obtained with commercially available strain gauges yield a force output of the damper that is in good agreement with the readings from the load cell. This comparison is achieved via the use of a position and velocity transducer, which combines good accuracy together with robust performance in a marine environment. The paper then examines the performance of a portable data acquisition system that can be used to collect and transmit data from a damper installed on a bridge to a nearby location (order of a km) where data are collected via either a wired or a wireless Local Area Network (LAN). Alternatively, the data may be transmitted to any remote location via mobile telecommunication networks; however, this requires leased telephone lines. The data show that the proposed arrangement is promising for monitoring in situ the force output of fluid dampers and detecting possible loss of their energy dissipation capability.
机译：本文介绍了有关中型和大型流体阻尼器的综合实验程序的结果，旨在通过简单地测量阻尼器壳体和阻尼器端部垫片上的应变来提取其在循环负载期间的力输出。本文首先讨论了阻尼器内的应力路径，随后通过使用线性弹性，表明使用市售应变仪获得的实验数据产生的阻尼器力输出与测力传感器的读数非常吻合。 。这种比较是通过使用位置和速度传感器实现的，该传感器结合了良好的精度和在海洋环境中的强大性能。然后，本文研究了便携式数据采集系统的性能，该系统可用于从安装在桥梁上的阻尼器收集数据并将数据传输到附近的位置（千米数量级），该位置通过有线或无线本地数据收集。局域网（LAN）。或者，可以通过移动电信网络将数据发送到任何远程位置。但是，这需要租用电话线。数据表明，提出的装置有望用于现场监测流体阻尼器的力输出并检测其能量消散能力的可能损失。

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