Dropper of railway catenary is an important component of catenary of electrified railway.With the in-creasing of train speed,higher requirements are put forward for dropper of high speed railway catenary.For the service condition of the dropper under the effect of tensile-torsional coupling,adopted the finite element simulation software to simulate the tensile-torsional multi-conditions.The simulation results show that the axial displacement and torsion angle of the dropper are linearly and positively correlated with the torsion load under pure torsion load.The equivalent force is distributed in a laminar pattern along the circumference of the wire section of the dropper.Under the stress of the coupled tension-torsional condition,the torsion angle increases with the increase of the load.But the stress distri-bution has no obvious rule.In particular,when the coupling current is applied,the local stress of the dropper increases significantly and the anti-deformation ability decreases under the tension-torsion load.
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