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Indexed by:期刊论文

Date of Publication:2022-06-29

Journal:计算力学学报

Issue:2

Page Number:187-191

ISSN No.:1007-4708

Abstract:A new method is proposed to identify the power spectral density (PSD) of the vertical track irregularity. The vertically coupled vehicle-slab track model is established which belongs to moving irregularity model. The vehicle model is simplified as a multi-rigid body model, and the slab track model is considered as a three-layer beam model. The vehicle model and the slab track model are coupled by the linearized wheel-rail contact. The axle box acceleration is used as a measurement target. The PSD of the vertical track irregularity is obtained using the inverse pseudo excitation method. It revealed that the identification accuracy is affected by the measurement accuracy of the axle-box acceleration and vehicle speed. Numerical results indicate that the proposed method can be accurately identified the PSD of the vertical track irregularity, and presents a new way for identification and assessment of the train load.

Note:新增回溯数据