Simulation and optimization design methods and systems for emu obstacle removal snowplows based on multi-physical field coupling

A simulation and optimization design method for an electric multiple unit (EMU) obstacle removal snowplow based on multi-physical field coupling, comprising:

• S1:
• collecting a snow environmental parameter of a target line, wherein the snow environmental parameter includes at least snowfall data and snow accumulation data;
• S2:
• establishing a soft sphere model of snow particles and determining a contact force between the snow particles using a Hertz-Mindlin with JKR cohesion contact model;
• S3:
• performing snow accretion simulation based on a wall snow accretion criterion using a discrete phase model, and then verifying correctness of a snow removal resistance formula in the snow accretion simulation by comparing with preset snow removal experimental data;
• S4:
• establishing an obstacle removal snowplow model using a parametric modeling approach, and introducing a shape parameter into the snow removal resistance formula based on a simulation result of the snow accretion simulation to simplify a running resistance coefficient, and then evaluating snow removal performance of the obstacle removal snowplow under a preset shape parameter combination to determine the snow removal resistance formula of the obstacle removal snowplow;
• S5:
• adding a train nose to the obstacle removal snowplow model to form a whole vehicle model and performing simulation based on the whole vehicle model, and then correcting the snow removal resistance formula and generating an obstacle removal snowplow selection recommendation;
• S6:
• performing simulation under a preset snow depth and running velocity to obtain train forces and snow removal paths under different snow depths and running velocities, and then generating a maximum velocity capable of satisfying an actual operation requirement under different snow depths based on a preset constraint condition;
• and
• S7:
• outputting an optimal design parameter of the obstacle removal snowplow.