Abstract
In order to study the effect of vibration of the engine and fracturing pump on the truck frame during the fracturing operation, lumped parameter method and state-space method were used to build multi-body dynamics coupling model between the balanced suspension, tires, engine, fracturing pump and the frame. Based on this model, the MATLAB/Simulink software was applied to simulate the characteristic of rotational speed, stiffness, and damping of the 2500 fracturing truck during the fracturing operation. The results show that the maximum intensity of vertical vibration is hundreds of times that of pitch motion. The vibration frequency range of 0∼10 Hz affects vibration most evidently; the variation of stiffness of the rear suspension and the damping of the front and central suspension has a great influence on amplitude, while the variation of damping of rear suspension and the stiffness of the front and central suspension have a great influence on frequency of peak.
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