The Structural Design And Simulation Of Anaxial Thrust Type Mechanical Vibration Table

Vibration table is a kind of stanadard testing equipment used to detect the mechanicalproperties of industrial products and Architectural Engineering. Based on analyzing featuresand present situations of all kinds of vibration tables existed domestic and abroad, a new typeof axial thrust mechanical vibration table was designed with large load capacity, high upperlimiting frequencies and little acceleration waveform distortions through adopting newexciting methods and special structures. With deep theoretical study and simulation research,this paper expected to provide vibration industry with new methods, new techniques and newequipments.First of all, according to the exciting principle of the axial thrust vibration table,envelope principle was applied to derivate the mathematical equations of the vibrationplatforms curved surface, made sure the output curves conform to the law of cosineacceleration motion. The morphological characteristics of contact lines between the curevedsurface of vibration platforms and the rollers were studied on this basis. Meanwhile, theradius of curvature and the pressure angles formulas were derivated, which is a basis fordetailed design and mechanical analysis to the vibration table.Secondly, the vibration table was analyzed from two aspects-rigid body dynamics andelastokinetics. By building systemic dynamics differential equations, this thesis discussed itsoutput torque characteristics and critical conditions for stable operation, and then conductedsimulation verifications. What is more, the reason for harmonic wave errors of displacements,velocitis and accelerations were reserched, and the rotate speed restrictions of main spindleswere provided according to the function curves of the platform’s residual oscillations. Hertztheory was used to check the strength of contacting parts. Power consumption caused byrelative movements between rollers and vibration platform was analyzed.Lastly, features of output wave were verified and analyzed on the basis of building thisvibration table’s virtual prototype model. Acceleration waves were analyzed from errors ofrandom waves and harmonic waves; its distortions were calculated with methods of DFTspectrum analysis. Based on UG/Motion and Matlab/Simulink co-simulation technique, thevibration table’s dynamic models and control systems were built up, and a co-simulation wasconducted to prove the validity and rationality of the control systems, which will lay thefoundation for optimization study of the new type vibration table.