Hysteresis damping characteristics calculation in an overcritically compressed member with variable cross section

Vestnik MGSU

Smirnov Vladimir Aleksandrovich¹ 

[1] Moscow State University of Civil Engineering (MGSU);

关键词: beam column;    loss factor;    vibration isolation;    large deformations;    hysteresis damping;    stiffness corrector;    spring steel;    internal friction;    energy theory;   

DOI  :  

来源: DOAJ

【 摘 要 】

The article focuses on calculating the loss factor in the stiffness corrector of quasi-zero stiffness vibration isolator, designed for precision equipment vibration isolation from low-frequency base vibrations. Stiffness corrector is a beam with a variable cross-section and an initial curvature loaded in the middle with the transverse load. The initial curvature of the beam is determined by solving the problem of the axial deformation of the beam of variable cross-section with an axial load exceeding the critical Euler force. The loss factor of the stiffness corrector’s material is determined in accordance with Panovko energy theory. For these purposes, the elastic shape of the stiffness corrector loaded with transverse force is calculated and potential energy of the corrector, which corresponds to the prescribed elastic shape, is obtained. Loss factor is calculated by dividing the absorption coefficient of the stiffness corrector material by its potential energy for various types of cross-sections of corrector’s beams. Determination of stiffness corrector’s material loss factor is performed through several experimental investigations, in which the coefficients of the approximating function are obtained via approximation of specimen of damped oscillations.

【 授权许可】

Unknown