Experimental system and method for simulating a gear transmission of an electric multiple unit under wheel-rail excitation

An experimental system for simulating a gear transmission of an electric multiple unit under wheel-rail excitation, comprising a platform base plate (1), a gear transmission experimental table, an excitation device, and a gear transmission system suspension device (10), wherein

• the gear transmission experimental table comprises a load motor (4) and a drive motor (14) which are arranged on both sides of a gear transmission system (8);
• a double-cross splined universal coupling I (6) and a bearing seat I (7) are arranged between the load motor (4) and the gear transmission system (8) in sequence;
• a plum coupling (13), a torque and speed sensor (12), a double-cross splined universal coupling II (11), and a bearing seat II (9) are arranged between the drive motor (14) and the gear transmission system (8) in sequence;
• the gear transmission experimental table is arranged on an upper surface of the platform base plate (1);
• the excitation device is arranged below the platform base plate (1);
• during operation, power is transmitted to the gear transmission system (8) by the drive motor (14) through the plum coupling (13) and the double-cross splined universal coupling II (11);
• vibration signals input and output during operation of the drive motor (14) are acquired by the torque and speed sensor (12) through the plum coupling (13);
• a load torque is applied to the gear transmission system (8) by the load motor (4) through the double-cross splined universal coupling I (6);
• sinusoidal excitation is output by the excitation device according to a frequency required by an experiment along a vertical direction to knock the platform base plate (1), and the wheel-rail excitation received by the gear transmission system (8) during operation of the electric multiple unit is simulated;
• and a dynamic response and a dynamic stress of the gear transmission system (8) are acquired;
• the gear transmission system suspension device (10) comprises a suspension support frame (1001), a hanger rod (1002), and a connecting plate (1003);
• the suspension support frame (1001) is a door-type support frame;
• the suspension support frame (1001) comprises a cross beam and two upright posts;
• the suspension support frame (1001) is arranged on the upper surface of the platform base plate (1);
• the hanger rod (1002) is suspended below the cross beam;
• the connecting plate (1003) is fixedly connected with the hanger rod (1002);
• and the gear transmission system (8) is arranged on the connecting plate (1003).