Multiple load recognition and fatigue assessment on longitudinal stop of railway freight car
Source abstract
Abstract
Abstract Safety evaluation of key support components remains a challenge for freight trains because of the difficulties in direct and precise monitoring. In this work, the longitudinal stop on well-hole freight train, which prevents the cargo from sliding in anterior-posterior direction, is investigated. Load identification approach is proposed via strain perception at multiple locations, which are selected from the optimal positions sensitive to longitudinal and lateral loading in Finite Element Analysis (FEA). Validation is performed in random loading simulations. The identified loads deviate from the random sets within 4.07%. Longitudinal and lateral forces are recognized in an attempt to calculate the signed von Mises (SVM) stress of the longitudinal stop structure for fatigue evaluation. In application, the reconstructed structural stress climbs up to 107.1 MPa for the right weld base. Employing the rain-flow counting and Miner’s damage rule, the recommendation for load spectra grade in convergence is 64 groups. The equivalent fatigue damage is 0.854 and it drops to 30% in the statistical annual maximum mileage equivalency. Research outcome reveals that the proposed method enables the real-time monitoring of service loads and structural stress in railway freight transport, which provides scientific evidence for its maintenance planning and structural optimization.
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Research context
OpenAlex topics: Railway Engineering and Dynamics · Structural Health Monitoring Techniques · Fatigue and fracture mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Traffic Safety on Track, Ministry of Education, Joint International Research Laboratory of Key Technology for Rail Traffic Safety, National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, School of Traffic and Transportation Engineering, Central South University , Changsha 410075 , China
Freight Department, China State Railway Group Co., Ltd , Beijing 100844 , China
General Management Department, China Railway Special Transportation of Large Cargo Service Co., Ltd , Beijing 100070 , China
References (30)
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