A new method for calculating the stiffness of a tight bolted joint system Qijing Road Shijiazhuang Army College, Shijiazhuang, 50083 It is known from engineering mechanics that an elastic body is deformed after being stressed, and at the same time, it accumulates energy inside it. This energy is called deformation energy. In the process of deformation, if energy loss is not considered, the deformation energy accumulated in the elastic body is numerically equal to the work done by the external force, 艮=. When the external force is from zero to the corpse, the integral result is known to take =4 4 is the deformation of the elastomer, its geometric meaning, the angle of 0 households, the area is the work done by the external force, that is, the deformation energy of the elastic body. 2 is the force deformation of the bolted joint system. In the middle, the pre-tightening force applied by the bolting system, 4421 is the deformation of the bolt and the connected member after being pre-stressed. Therefore, after the preload is applied, the upper neutralization is the rigidity of the bolt and the coupled member, respectively.
After being preloaded, the entire system is deformed. After being affected by the working load, the force is deformed by 3. The deformation energy of the bolted joint system is 92 in the angle 56 and the angle, and 92+=+42 in the middle. +02 substituting into the upper formula is â–³91+, 92 +, 2=, constant establishment = + established. The overall stiffness of the èž“ bolt connection system is equal to the sum of the stiffness of the coupling member and the coupled member.
1 Yang Kezhen, editor of Cheng Guangyun. The basis of mechanical design. Higher Education Press, 1989.5.
2 Qijing Road. The overall stiffness of the bolted joint system. Mechanical Design and Manufacturing, 1999.2.
3 Engineering Mechanics 1 Beijing Iron and Steel Institute. Northeast Institute of Technology. Higher Education Press, the amount of change in the deformation energy of the bolted joint system is
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