A Simplified Modal Superposition Method Based Pantograph-Stitched Catenary Interaction Model

The modal superposition method (MSM) has been proven to be more accurate and more efficient than the finite element method in modeling pantograph-catenary interaction systems.However, the stitched wire in a stitched catenary system is difficult to directly model by the modal superposition method, which limits its application in the investigation of pantograph-stitched catenary interaction dynamics.In this work, a new modal superposition method-based pantograph-stitched catenary interaction model is developed to simulate pantograph-stitched catenary interactions.In this model, the stitched wire is simplified into a part of the messenger wire supported by two spring-damping elements, and the modal superposition method is then used to model the simplified stitched catenary system.The present model is validated by the EN 50318:2018 standard.The validation results show that the proposed modal superposition method-based model can accurately simulate the pantograph-stitched catenary interaction with proper key parameters considered, including the distance between every two spring-damper elements and the stiffness of the elements.