Wheel rail adhesion control method and device under braking large creep working condition

• Main Authors: CHANG CHONGYI, ZHOU JIAJUN, CAI YUANWU, ZHAI GENGWEI, TIAN CHUN, CHEN BO
• Format: Patent
• Language: Chinese; English
• Published: 26.03.2024
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTEDFOR SPECIFIC APPLICATION FIELDS; PERFORMING OPERATIONS; PHYSICS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL

The invention relates to a wheel rail adhesion control method and device under a braking large creep working condition. The method comprises the following steps: acquiring vehicle parameters, material characteristic parameters, initial wheel rail temperature parameters and initial water film thickness parameters; the mutual coupling relation between the temperature and the material characteristic parameters is considered, a ZMC model is adopted to calculate the bearing pressure of a wheel-rail solid material, and a simplified N-S equation is adopted to calculate the bearing pressure of a fluid medium material between wheel rails; calculating the sum of the pressure borne by the wheel-rail solid material and the pressure borne by the fluid medium material between the wheel rails, and comparing the sum of the pressure with the train axle load to obtain a comparison result; inputting the friction coefficient of the wheel-rail contact interface into an FASTSIM wheel-rail tangential force calculation model to obta