Modal Simulation Study of Pantographs

As the core component for power acquisition in rail transit trains, the dynamic characteristics of the pantograph directly determine the power supply stability of the pantograph-catenary coupling system. The modal characteristics of the pantograph serve as a key indicator for evaluating its structural dynamic response. If the operating frequency of the pantograph approaches the external excitation frequency, resonance may occur, leading to structural fatigue damage or fluctuations in the pantograph-catenary contact force, thereby compromising power supply reliability. This study investigates the pantograph of a specific high-speed train model using finite element method-based modal simulation. First, the pantograph’s geometric model was constructed in SolidWorks, followed by mesh generation and model optimization in HyperMesh. Subsequently, material properties and boundary conditions were defined in ANSYS Mechanical, and the first 10 natural frequencies and mode shapes were extracted using the Lanczos method. Results indicate that the first five natural frequencies of this pantograph cluster between 2.7193–12.0334 Hz, with primary vibration modes comprising head oscillation, arm uplift/submergence, and vibration. This study provides theoretical support for structural optimization (e.g., adding damping elements, adjusting member stiffness) and resonance avoidance design, holding significant engineering implications for enhancing the operational stability of high-speed train pantograph-catenary systems.