A Method of Determining Normal Contact Stiffness of Engineering Bonding Interface
A technology of contact stiffness and interface, which is applied in the field of dynamic measurement, can solve problems such as the inability to obtain the relationship between normal contact stiffness and normal load change, and the inability to intuitively understand the characteristics of normal contact stiffness
Active Publication Date: 2019-07-23
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a method for determining the normal contact stiffness of the engineering joint interface, so as to solve the existing problems in the prior art that the explicit expression of the relationship between the normal contact stiffness and the normal load change cannot be obtained, and cannot be visualized. Problems Understanding Normal Contact Stiffness Properties
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[0041] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0042] The invention provides a method for determining the normal contact stiffness of an engineering joint interface, aiming at the existing problems that the explicit expression of the relationship between the normal contact stiffness and the normal load change cannot be obtained, and the characteristics of the normal contact stiffness cannot be intuitively understood.
[0043] Such as figure 1 As shown, the method for determining the normal contact stiffness of the engineering bonding interface provided by the embodiment of the present invention includes:
[0044] S101, respectively measuring the contact resonance frequency of the contact interface under two sets of different normal loads;
[0045] S102, calculating a contact stiffness value correspo...
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The invention provides a method for determining engineering bonding interface normal contact stiffness. The normal contact stiffness characteristic can be visually konwn. The method comprises the following steps: measuring the contact resonance frequency of the contact interface under two groups of different normal loads; calculating the contact stiffness value corresponding to the measured contact resonance frequency; determining the analytical expression of the normal contact stiffness with respect to the normal load according to the calculated contact stiffness value; and determining the normal contact stiffness under different normal loads according to the determined analytical expression of the normal contact stiffness with respect to the normal load. The method is applicable to contact stiffness value determination operation.
Description
technical field [0001] The invention relates to the technical field of dynamic measurement, in particular to a method for determining the normal contact stiffness of an engineering bonding interface. Background technique [0002] Mechanical equipment is a complex mechanical system composed of various components according to predetermined functional requirements. In engineering, the contact surface between parts, components, and components is called "bonding interface" or "contact interface". Common contact interfaces in engineering practice, such as bolted joint interfaces, are not absolutely smooth, but have varying degrees of roughness. Relevant studies have shown that 60%-80% of the stiffness of a mechanical system comes from the contact interface, and the contact stiffness directly affects the dynamic characteristics of the contact interface, which is a crucial factor in determining the performance and working life of mechanical parts. The key common basic scientific pr...
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IPC IPC(8): G01M5/00
CPCG01M5/0066
Inventor 肖会芳孙韵韵徐金梧
Owner UNIV OF SCI & TECH BEIJING