Air spring three-way composite loading fatigue test device and method

Abstract

The invention provides an air spring three-way compound loading fatigue test device and method. The device comprises a support and is characterized by also comprising a transverse loading assembly forapplying a transverse dynamic load to an air spring, a vertical loading assembly for applying a vertical dynamic load to the air spring and a longitudinal biasing assembly for enabling the air springto generate longitudinal deformation, wherein the transverse loading assembly is arranged on the support in the forward and backward directions of the air spring; the longitudinal biasing assembly isarranged on the transverse loading assembly, and the locating position of the longitudinal biasing assembly on the transverse loading assembly can be adjusted; the air spring is arranged on the longitudinal biasing assembly; and the vertical loading assembly is arranged above the air spring in the vertical direction and is in contact with the air spring. The device and the method provided by theinvention can simulate the bearing condition in the actual operating condition of the air spring, accurately reflect the fatigue performance of the air spring and detect the fatigue life of the air spring, thereby providing reliable and accurate test processes and data for optimizing the structure of the air spring.

Description

technical field [0001] The invention relates to an air spring three-way composite loading fatigue test device and method, which simulates the actual operating conditions to carry out the composite loading fatigue test on the air spring. Background technique [0002] With the speed increase of railway passenger transport and the development of EMUs, higher requirements are put forward for the dynamic performance of vehicles. The suspension system on traditional trains is difficult to meet the needs of high-speed driving. The air spring has nonlinear characteristics, and can be designed into an ideal elastic characteristic curve according to the vibration performance of the vehicle; it can make the natural vibration frequency of empty and heavy vehicles almost equal; it can be used with the height control valve to make the vehicle body maintain the vehicle under different loads. The height from the floor surface to the rail surface remains unchanged; it has good performance in...

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Problems solved by technology

These two methods are purely theoretical research methods.

[0004] At present, the test technology of air spring mainly involves static stiffness test, forced vibration dynamic performance, free vibration dynamic performance, torsional stiffness, torsional shear stiffness, single torsional pendulum fatigue, double torsional pendulum fatigue, high and low temperature performance, most of these tests are static one-way , two-way and dynamic one-way loading, only the specific performance parameters of the air spring can be tested, and the three-way composite loading fatigue test of vertical, transverse dynamic plus longitudinal offset displacement cannot be realized

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