On the coherency of dynamic load estimates for vehicles on flexible structures

Mitra, Mainak and Gordon, Timothy (2014) On the coherency of dynamic load estimates for vehicles on flexible structures. Vehicle System Dynamics, 52 (sup1). pp. 299-316. ISSN 0042-3114

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Item Type:Article
Item Status:Live Archive


This paper develops a novel form of a well-known signal processing technique, so as to be
applicable to the interaction between a heavy truck and a supporting bridge structure.
Motivated by the problem of structural health monitoring of bridges, a new modal
coherency function is defined. This relates the input action of moving wheel loads to the
dynamic response of the bridge, including the effects of unevenness of the road surface and
the vertical dynamics of the truck suspension. The analysis here is specifically aimed at
future experimental testing – the validation of axle load estimators obtained from sensors
on the truck. It is applicable even when no independent ‘ground truth’ for the dynamic
loads is available. The approach can be more widely used in the analysis of dynamic
interactions involving suspended moving loads on deformable structures, e.g. for structural
vibrations due to high-speed trains

Additional Information:Special Issue: IAVSD Proceeding Supplement The 23rd IAVSD symposium was held in Qingdao, China from 19th to 23rd August 2013, co-hosted by State Key Laboratory of Traction Power, Southwest Jiaotong University, and CSR Qingdao Sifang Co. ltd, China
Keywords:vehicle-bridge interaction, vehicle dynamics, modal analysis, tyre dynamics, truck dynamics, force estimation, NotOAChecked
Subjects:H Engineering > H300 Mechanical Engineering
Divisions:College of Science > School of Engineering
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ID Code:19222
Deposited On:01 Nov 2015 20:34

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