Load identification and fatigue evaluation via wind-induced attitude decoupling of railway catenary
Source abstract
Abstract
Abstract In strong wind area, wind vibration on key railway catenary components may lead to safety hidden danger like fatigue failures. In this work, a load identification approach was proposed by decoupling the wind-induced suspension attitude to acquire the hard-to-get environmental wind load and evaluate the catenary fatigue damage on railway catenary. In theoretical modeling, mechanical relation between wind load and registration displacement is formulated in pure lateral and vertical loading by finite element analysis. Wind load is identified via suspension attitude decoupling into displacement under individual load. Nodal forces, as the external load acting on catenary connections between supporting beams, are further correlated with the identified wind load to calculate the structural stress of catenary components. In experiment, visual detection is used to measure the wind-induced attitude of catenary suspension in wind area, where maximum wind speed climbs up to 41 m/s. Experimental results are transferred into wind loads and nodal forces using the proposed model. Stress spectra and fatigue damage evaluation of connection components are carried out adopting the rain-flow counting method and damage accumulation rule. Research outcome certifies that the proposed methodology provides an effective means to evaluate the fatigue behavior of railway catenary in wind area.
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Research context
OpenAlex topics: Electrical Contact Performance and Analysis · Railway Engineering and Dynamics · Advanced Fiber Optic Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Traffic & Transportation Engineering, Central South University , Changsha 410075 , China
Key Laboratory of Traffic Safety on Track (Central South University), Ministry of Education , Changsha 410075 , China
Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University , Changsha 410075 , China
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle , Changsha , Hunan , China
School of Mechanical Engineering, Nanjing University of Science and Technology , Nanjing 210094 , China
China Railway Urumqi Bureau Group Co., Ltd. , Xinjiang , China
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