Adjustable gap nonlinear research test bed and use method thereof

Abstract

The invention provides an adjustable gap nonlinear research test bed which comprises a cantilever beam, a gap size adjusting assembly, a gap rigidity adjusting assembly, a gap position adjusting assembly, a cantilever beam supporting assembly and a base. Gaps of different positions, different sizes, different rigidities and different numbers can be obtained through a gap adjusting device and the good test bed is provided for research on influence on cantilever beam vibration by the different gaps and identification of a system with the gaps. The principle of the adjustable gap nonlinear research test bed is that gap positions can be adjusted through the method that a gap position adjusting frame moves along a guiding groove; the bending rigidity of a gap rigidity beam is equivalent to the gap rigidity and the gap rigidity is adjusted through the change of materials of the gap rigidity beam and the change of the thickness of the gap rigidity beam; different gap values are obtained through replacement of pads of different thicknesses; the number of gap adjusting devices is increased so that research on the gaps can be achieved. According to the adjustable gap nonlinear research test bed, the structure is novel, functions are multiple, operation is simple, manufacturing is easy, and the structure is compact.

Description

technical field [0001] The invention specifically relates to a test platform for studying the nonlinear influence of the gap and identifying system parameters with adjustable gap parameters. Background technique [0002] In order to ensure the smooth assembly of parts and the normal movement of kinematic pairs, clearance is inevitable. The contact collision force caused by the gap will seriously affect the dynamic response of the system, making it deviate from the ideal state, thereby reducing the performance and life of the mechanical system. Therefore, it is of practical significance to study the mechanism of gap nonlinearity and its control strategy to improve the stability and precision of the mechanical system. Scholars at home and abroad have carried out a series of scientific research on gap nonlinearity, and carried out experimental research on the gap test bench. Belgian scholar Kerschen designed a piecewise linear beam test rig for gap research. The gap is set at...

AI Technical Summary

Problems solved by technology

However, in the prior art, the test bench used to study the nonlinearity of the gap has the following deficiencies: the gap parameters are difficult to adjust, and the influence of different gaps on the system cannot be studied; there is only one gap, and the influence of multiple gaps on the cantilever beam cannot be simulated; it is difficult to rule out Other nonlinear disturbances, such as gravity, friction, etc.; the accuracy of gap parameters cannot be precisely controlled, etc.

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