Non-Linear Mechanics Behavior And Characteristics Research On Rubber Damper

Rubber Damper are widely used in engineering field, and the accuracy requirement of vibration isolation system design is improved constantly with humanized requirements of various working conditions as well as accuracy requirement and reliability requirement improvement of equipments. For example, rubber damper utilized in various vehicle systems and mechanical system such as marine engineering, draught fan, grinder, machine tool and etc.Many design problems related to Rubber damper system can be static designed and oversimplified dynamic designed with proven techniques now. Some dynamic theories and experimental technologies are still in the status of experiment research and vibration isolation effect confirmation. Theories and experiment research on dynamic mechanic behavior and dynamic mechanic characteristic parameters are less in the engineering design especially are short of quantitative research methods and theories on their strongly high nonlinear dynamic system performance. Rubber isolators design must be supported by these theories and experiment as to achieve more precise design which meets working condition requirements. Static and quasistatic characteristic parameters and simplified linear dynamic theories are mostly utilized to design rubber damper in the engineering design which is rely on practice and the existing part of nonlinear finite element software application.The experiment research in this paper demonstrated that designs which relied on these performances and theories are mostly not concordant with dynamic working conditions and are short of dynamic parameters and theories with higher accuracy. This also leads to the disjunction of rubber damper design technology and various manufacture technologies. Which means that defect of dynamic mechanic performance of rubber damper and theories and experiment of mechanic behavior leads to the current situation that rubber damper design has low accuracy and unreliable performance. Nonlinear mechanic behavior and characteristic research and practical application problems about rubber damper are frontier problems in scientific and technological circles and in scientific and technological circles and engineering circles.The Rubber damper utilized in vehicle systems are mostly in a dynamic working environment, Rubber damper is mainly provided by rubber high polymer material, and rubber high polymer material belongs to hyperelastic material, its mechanical behavior embodied in a type of mechanical behavior of solid elasticity and liquidviscosity. Its static and quasistatic mechanical behavior embodied in highly nonlinear feature and has strong dependence of time and temperature; it is relative to load frequency, load amplitude and deformation form and etc. It combines various nonlinear problems, for example, high material-nonlinearity, high nonlinear of geometry large deformation and nonlinear problems of contact boundary. This paper performed static and dynamic characteristic relationship research according to rheology research method from macroscopical and microcosmic level after deeply studied experimental equipment and theories that about structure components and static dynamic mechanic behavior and performance utilized commonly in vehicle system and based on working condition. Several conclusions and abundant results were gained from rubber isolator strongly nonlinear problems by researching various nonlinear theories and experimental research.In order to obtain precise dynamic characteristic, based on basic theory on strongly nonlinear system static dynamic mechanics and finite elements technology and vibration measurement and control technology, static superelasticity and dynamic viscoelasticity system based on result block stack nonlinear system modeling method and mathematical-force model was built; dynamic performance measurement and control system of vehicle rubber damper were designed; mathematical-force modeling and finite elements solving technology of rubber damper was researched; system theory methods and methods of measurement were obtained. Performance test and reckoning based on nonlinear superelasticity, combined with dynamic experiment research and theoretical modeling technology, researched nonlinear modal analysis techniques of vehicle rubber damper. Performed bench experiment by utilizing developed vehicle rubber damper measure and control system software and partial hardware equipment combined with hydraulic servo vibration table. This paper researched its partial characteristic parameter and stability of mechanical behavior forecast and precision.