Optimum Design Of Multiple Degree Of Freedom Dynamic Vibration Absorbers

DVA has long been proved to be a very effective means of vibration, its basic design principle is studied by many scholars and is widely used in engineering practice. This article first optimized the single damped dynamic vibration absorber system.In the first optimization, using the nature of the amplitude magnification curves through the fixed point, the optimization process has been descripted detailly.in the second optimization method, using the method of computer programming, and through comparing two different optimization methods'results then verify the feasibility of computer programming, and also obtained the single damped dynamic vibration absorber system's optimal amplitude magnification curve. Then, the single roller type dynamic absorber system is optimized, the optimal amplitude magnification curves obtained.In the double-damped dynamic vibration absorber optimization process, because can not using the nature of the amplitude magnification curves through the fixed point, so use a proven computer programming approach to optimize. The main programming idea is using the small range of long search to get the optimal parameter values, according to the calculated parameter values made a double damping system optimal dynamic vibration amplitude magnification curves, and with a single damped dynamic vibration absorber system the optimal amplitude magnification curves were comparison,obtain the conclusion that the use of two in series absorber can reduce the maximum amplitude magnification.Finally, by similar steps and processes, on the double-roller type dynamic vibration absorber has been optimized, the optimal amplitude magnification curves obtained, and with the single-roller type dynamic vibration absorber into the optimal amplitude magnification curves are compared leading to the conclusion: Double roller type dynamic vibration absorber can be obtained than the single-roller type dynamic absorber effect of better vibration absorption, and obtained quantitatively the decline in value of the maximum amplitude magnification.