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Structure analysis and optimization of automotive suspension hem arm
As an important part of suspension, the lower swing arm transmits the force and torque of the wheel to the body, and its structural performance is very important, which affects the safety of the whole vehicle. This paper analyzes the force and deformation characteristics of the lower swing arm through static analysis under different working conditions. Through static analysis of the lower swing arm, the static and dynamic properties of its structure are understood, which provides analysis conditions for the lightweight of the swing arm in the later stage.
Material model
The upper and lower plate structure of the lower swing arm needs to be reamed, and it must have high strength mechanical properties. The upper and lower plates of the lower swing arm are made of Lianxang bainitic biphase steel (also known as high reaming-steel), which should have high strength, elongation, excellent formability and flanging performance, and can meet the requirements of complex auto parts with high formability.
Boundary conditions and loads
Three typical limit working conditions of maximum vertical force, maximum lateral force and maximum braking force were selected to analyze the swing arm. Through the virtual prototype analysis of the swing arm, the load conditions of the swing arm under the three working conditions were analyzed, and the load data was extracted as the input load for structural analysis. Constraint conditions: Under the three working conditions, the X/Y/Z translational freedom and Y/Z rotational freedom of the front point are constrained, and the X/Y/Z translational freedom and X/Y rotational freedom of the back point are constrained. According to the load data extracted from the dynamic analysis, the input load at the outer point of the swing arm is analyzed.