Open AccessVibration protection system with nonlinear elastic and damping characteristics
Author(s) -
М. С. Корытов,
V. S. Shcherbakov,
V. V. Titenko,
I. E. Pochekueva
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1791/1/012015
Subject(s) - vibration , kinematics , nonlinear system , stiffness , acceleration , control theory (sociology) , vibration isolation , structural engineering , displacement (psychology) , mathematical analysis , mathematics , computer science , engineering , physics , classical mechanics , acoustics , quantum mechanics , psychology , control (management) , artificial intelligence , psychotherapist
One of the leading areas of improving the road construction machines is to increase the comfort and safety of the human operator by reducing vibration effects. Therefore, the most simple and available way to implement this direction is applying the passive vibration isolation of a human operator’s seat. Vibration protection mechanisms of such seats typically have one translational degree of freedom. Studying the single degree of freedom vibration protection systems under the various external influences, in particular, with kinematic excitation of base displacements is a relevant topic of investigations. The research objective is to develop a mathematical model of a vibration protection system with variable stiffness and damping coefficients of a vibration isolator, as well as to optimize the mathematical model parameters. The following problems were solved: the development of the calculation model, the compilation of the model differential equations system, the description of the dependences of the stiffness force and damping coefficient of the vibration protection system using two-point Hermite splines. A type of the kinematic excitation characterized by one parameter - a constant base velocity, the evaluation criterion of the system response to this kinematic excitation - the maximum object acceleration and the integral criterion for assessing the system response to a spectrum or excitation range at the different speeds were proposed. The parameters specifying the type of the dependences of the stiffness force and damping coefficient of the vibration isolator were optimized by the integral criterion. The results are represented in the form of the mathematical model formulas, displacements and accelerations graphs and optimized values of the system parameters.