高速履带车辆机电悬架惯量分析与滤振缓冲设计

In order to solve the problem of performance deterioration and ensure structural reliability of the electromechanical suspension of high-speed tracked vehicles in high-frequency zone, the stiffness characteristics of the electromechanical suspension based on the torsion bar are analyzed, the complex motion relationship of the suspension rod system is solved, the equivalent inertia mass of the electric actuator is calculated, and a two-degree-of-freedom electromechanical suspension model considering inertia mass and load wheel damping is established. We quantitatively analyze the adverse impact of inertia mass on suspension performance, and obtain the frequency domain distribution interval and power spectral density distribution interval of inertia force affecting suspension's ride comfort and component reliability. According to the frequency domain distribution of suspension inertia force and the amplitude frequency characteristics of the suspension's dynamic deflection, the measures of vibration filtering and buffering are put forward, and a suspension model with the vibration filtering buffer is established. The simulation and test results show that vibration filtering and buffering can effectively reduce the influence of inertial mass. Under the driving condition of 40 km / h on class D Road, the root mean square value of the original inertial force is reduced from 2 143 N to 175 N, and the root mean square value of sprung mass acceleration is reduced from 3. 510 8 m / s² to 1. 268 2 m / s² . The bench test shows that the gear ring stress is greatly attenuated after the vibration filtering and buffering measures are adopted, and the maximum value is reduced from 519. 9 MPa to 110. 1 MPa. Through simulation and test, it is verified that the measures of vibration filtering and buffering can improve the performance of the electromechanical suspension and help to solve the problem of performance deterioration in the high frequency zone caused by inertial mass.