Research On Suspension Optimization Of Heavy Clamping Plate Spring And Its Influenceon Vehicle Smoothness

Heavy truck is an important tool for transportation.In recent years,with the rapid development of the transportation industry,the requirements on its carrying capacity,ride comfort and driving comfort have been continuously improved.The suspension system of heavy-duty trucks is an important component that affects the performance and comfort of the car,and the leaf spring structure is one of the key components that determines the performance of the suspension system,which directly affects the working performance of the suspension system.Practice has proved that the existing leaf spring structure can no longer meet the requirements for higher performance of automobiles.Therefore,it is imperative to study new leaf springs.This article will carry out the design of new leaf springs for heavy-duty trucks,and study the impact of new leaf springs on vehicle dynamics and vehicle smoothness.Using the theoretical analysis method,the improvement of the performance of the entire vehicle through the improvement of the original leaf spring structure was studied,and the dynamic model of the leaf spring suspension system was established;the design and calculation of the improved new leaf spring reed were determined.The dimensions and main parameters of each part of the new leaf spring are compared and analyzed.The results show that the new leaf spring improves the performance of the heavy-duty truck and the smoothness of the car.The digital design software was used to conduct three-dimensional modeling of the leaf spring,and the finite element software was used to perform stress analysis and stiffness analysis on the new leaf spring.From the stress analysis cloud diagram,it can be seen that the maximum value of the leaf spring stress at the center of the upper and lower reeds is 205 Mpa,meeting the design requirements;the results show that the stiffness displacement of the new leaf spring has a linear relationship with the load,and the load gradually increases with the increase of the leaf spring displacement.When the displacement reaches 180 mm,the leaf spring load is 25000 N,which verifies the new plate The rationality of the spring designUsing digital 3D design software,the vehicle was 3D modeled and the finite element method was used to establish a multi-flexible body dynamic model of the cab and frame.A modal test experiment was conducted on the cab and frame,and the modal test results showed,The finite element method establishes the multi-flexible body dynamic model of the cab and frame.The modal frequency error is within 15%of the error range.The finite element method establishes the multi-flexible body dynamic model of the cab and the frame.On the basis,the multi-motion dynamic analysis software ADAMS was used to establish a rigid-flexible coupling dynamic model of the whole vehicle,including a new leaf spring suspension system,a cab and a frame.Using the numerical simulation software,the rigid-flexible multi-body dynamic model of the original leaf spring and the new leaf spring suspension system was simulated and analyzed.The effect of the original leaf spring and the new leaf spring suspension system on the ride performance of the vehicle was obtained.The results show that The improved smooth performance of the new leaf spring suspension system is better than the original leaf spring.Under the same road conditions,the acceleration amplitude of the new leaf spring is reduced by 25.9%compared with the original leaf spring.