Steering knuckle, also known as "sheep horn", is one of the important parts of automobile steering axle, which can make the automobile drive stably and transfer the driving direction sensitively. The function of the steering knuckle is to transmit and bear the front load of the car, support and drive the front wheel to rotate around the kingpin to turn the car. When the vehicle is running, it bears changeable impact load, so it is required to have high strength.
The steering knuckle is connected with the vehicle body through three bushings and two bolts, and is connected with the brake system through the brake mounting hole of the flange. When the vehicle is driving at high speed, the vibration transmitted from the road surface to the steering knuckle through the tire is the main factor we consider in our analysis. In the calculation, the existing vehicle model is used to apply 4G gravity acceleration to the vehicle, calculate the support reaction force of the three bushing center points of the steering knuckle and the center points of the two bolt mounting holes as the applied load, and restrict the 123456 degrees of freedom of all nodes on the end face of the flange connecting the braking system.
