Embedding human annoyance rate models in wireless smart sensors for assessing the influence of subway train-induced ambient vibration

Abstract

The operation of subway trains induces ambient vibrations, which may cause annoyance and other adverse effects on humans, eventually leading to physical, physiological, and psychological problems. In this paper, the human annoyance rate (HAR) models, used to assess the human comfort under the subway train-induced ambient vibrations, were deduced and the calibration curves for 5 typical use circumstances were addressed. An autonomous measurement system, based on the Imote2, wireless smart sensor (WSS) platform, plus the SHM-H, highsensitivity accelerometer board, was developed for the HAR assessment. The calibration curves were digitized and embedded in the computational core of the WSS unit. Experimental validation was conducted, using the developed system on a large underground reinforced concrete frame structure adjoining the subway station. The ambient acceleration of both basement floors was measured; the embedded computation was implemented and the HAR assessment results were wirelessly transmitted to the central server, all by the WSS unit. The HAR distributions of the testing areas were identified, and the extent to which both basements will be influenced by the close-up subway-train's operation, in term of the 5 typical use circumstances, were quantitatively assessed. The potential of the WSS-based autonomous system for the fast environment impact assessment of the subway train-induced ambient vibration was well demonstrated.

Modelling Ambient Vibration Responses Induced by Operation of Metro Train on Curved Rail Segment with Small Curvature Radius

“…For the past several decades, urban rail transit has boomed in developing countries, such as China [1]. Metro can greatly relieve the pressure of the urban traffic; however, the Metro train-induced structural vibration, along with the ambient noise, can also cause adverse effects on humans, including physical, physiological, and psychological effects [2][3][4][5][6][7]. erefore, ambient vibration along Metro lines has already begun to gain increasing attention.…”

Dynamic Responses of Soils around a One-Hole Double-Track Tunnel with the Metro Train Meeting

“…Scholars have carried out a variety of studies on the propagation law of the vibration generated by the Metro train running through the tunnels in soil layers, mainly on the double-hole double-track tunnels [3][4][5][6]. Volberg [7] discovered that the surface wave is the dominant factor of the vibration caused by vehicle operation; also, vibration energy was found decreasing due to the diffusion of the elastic waves and the weakening in the elastic medium.…”