• Lateral translation of 30 mm without crosswinds induces synchronous resonance in side and bottom gaps, causing the worst aerodynamic performance.
• Under crosswind conditions, a lateral translation of 40 mm maximizes peak pressure fluctuations and turbulent kinetic energy, leading to poorest aerodynamic stability.
• The study validates a numerical simulation method against wind tunnel tests, enabling accurate prediction of aerodynamic behavior in superconducting maglev systems.
• Findings provide critical guidance for operational safety and design improvements to mitigate aerodynamic instability in superconducting maglev trains.