Based On The Analysis And Study Of Factors Affecting Leaf Spring Vibration Under Simulation Environment

Acorrding to large passenger car and truck driving on the bumpy road,the car will have a serious vibration,Leaf spring in the body by the impact of the process issued a abnormal noise,The noise is caused by the deformation of the steel plate spring for load,lead to dry friction between the plates,Dry friction between the steel blade occurrence cause the wheels to the impact to some extent upload and handed the car frame,thus weakening the ability to withstand the impact of the suspension, and quickened abrasion between each plate. For this phenomenon,the author seek solutions,build and design test bench,Simulation test car in under the action of impact on the vibration of the leaf spring dynamics. Experiment scheme adopts the two models of cantilever beam and simply supported beam carry out dynamic tests on steel springs. By changing the coefficient of friction between the leaf spring plate. Under the action of impact record the vibration of the leaf spring dynamics. Research on the difference steel spring vibration dynamics.under different friction condition.The predecessors have done similar research,mainly for lubrication between the steel plate spring leaf anti-friction processing and put a pad on the bottom. In this way can get to a certain degree to ower vibration and the buffer,but the leaf spring work in a bad environment,exposed in the external environment. The wind and rain. After a period of time the lubricant or the pad has lost its damping effect. Therefore,On the basis of previous studies. For a long time, to keep the cushioning effect, By reducing friction lubrication methods are lower than the long-term effects, Under the guidance of instructors, Approach adopted by incresing friction. In order to verify the feasibility of increasing friction process, the experiment using the conventional friction between the leaf spring, oil lubrication, the friction increasing agent coating, the three kinds of treatment were compared, record experimental data, and through the theoretical calculation of cantilever beam and compared with the experimental data. Study of three kinds of treatment methods have any influence on the intrinsic characteristics of leaf spring.Through the analysis of the spectrum obtained by experiment and comparison between calculation and theory, obtained the following conclusions:1、friction increasing coat compared to ordinary grease processing, can get long-term buffer damping effect;2 、 under a range of conditions With increasing friction materials is conducive to enhance the damping effect of the steel plate spring;3 、 the friction increasing material coating layer of the spring plate not only can increase the overall stiffness of the plate spring, and can significantly reduce the forced vibration amplitudes;4、uncharacteristically increasing friction measures, for the structure design of steel plate spring application and created a new space for research.