Method and system suitable for recognizing connecting joint surface parameters

Abstract

The invention discloses a method and system suitable for recognizing connecting joint surface parameters. The test system for recognizing the parameters can test various features of joint surfaces of mechanical structures, and is wide in coverage range, wherein the joint surfaces include fixed joint surfaces (such as welded surfaces), movable joint surfaces (in threaded connection) and relative movement joint surfaces (such as sliding and rotating). According to the method and system suitable for recognizing connecting joint surface parameters, the relations between all connected visco-elastic units and the dynamic continuity of the connected visco-elastic units are considered, the mechanical properties and physical properties such as the dimensions of joint surfaces are considered, the operation of monitoring sensor arrangement points replaces deformation of joint surface points, and measurement is accurate; finally, a multi-scale and multi-level testing structure and correcting method are adopted, and then the calculation efficiency and the monitoring precision can meet the engineering application requirements.

Description

technical field [0001] The invention relates to the field of joint surface parameter identification, in particular to a method and system suitable for identifying joint joint surface parameters, for identifying joint surface stiffness and damping ratio. Background technique [0002] There are a large number of various surfaces in contact with each other in the mechanical or mechanical structure composed of parts, components, and components. 90% of the damping in the system comes from the joint surface. 30% to 50% of the static stiffness of the machine tool is determined by the stiffness characteristics of the joint. More than 60% of the vibration problems on the machine tool come from the joint. The joint surface belongs to the "flexible combination", which not only stores energy but also Dissipates energy, exhibits elasticity and damping, namely contact stiffness and contact damping. Stiffness and damping are very important in the design of many structures and systems, the...

AI Technical Summary

Problems solved by technology

[0004] In the past, some scholars proposed a combination of transfer function analysis and test mode to identify the joint surface parameters, but the identification accuracy is not high, and it is difficult to use in practice.

There are also scholars who have theoretically analyzed the joints with typical forms of machine tools. Although the precision is high, it is difficult to generalize.

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