1. Experimental modal analysis of a cantilever beam using a wireless sensor node for structural health monitoring
Authors : Surgwon Sohn
Pages : 112-115
DOI : http://dx.doi.org/10.21172/1.841.19
Keywords : Experimental Modal Analysis, Cantilever Beam, Wireless Sensor Node, Structural Health Monitoring Abstract :Structural health monitoring (SHM) is crucial for protecting structures against the wind, aging, and potential collapse. Modern wireless-based SHM has two main constraints: cost and power consumption. Micro electro-mechanical system (MEMS) accelerometers meet these conditions. A wireless sensor node is also important since it deals with vibration data acquisition and wireless transmission. This paper presents an experimental modal analysis of a cantilevered steel beam using a low-cost wireless sensor node for SHM in order to demonstrate the feasibility of its use. We use a commercial, off-the-shelf wireless sensor node, Waspmote, as a data acquisition and transmission board. Waspmote has a built-in MEMS accelerometer, LIS331DLH, and a daughter board for IEEE 802.15.4 wireless transmission protocol. Dynamic characteristics of the structures, such as natural frequencies, damping ratios, and mode shapes are acquired. These dynamic properties are here compared with the results of a conventional wired vibration measurement system.
Citing this Journal Article :Surgwon Sohn, "Experimental modal analysis of a cantilever beam using a wireless sensor node for structural health monitoring ", Volume 8 Issue 4-1 - August 2017, 112-115
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