Distributed tuned mass dampers (dTMD) can effectively mitigate the broadband vibration of a structure. However, when frequency in question reaches several hundred hertz, traditional optimization methods represented by fixed point theory are difficult to apply due dense modal density, complex boundary conditions, and inputs. This paper proposes minimax method based on damping optimize oscillator...

A parallel-mechanism-equivalent model for repeatability analysis of an overconstrained kinematic coupling is proposed. An Kelvin-type with one additional support introduced and used method illustration. Contact forces the under a preload are computed Moore-Penrose inverse, deformations obtained using Hertz theory. The equivalently modeled as 7-SPS parallel mechanism, spherical joints which repr...

Abstract The rotor system supported by the cylindrical roller bearings is widely used in various fields, such as aviation, space and machinery due to its importance. In study of analysis vibration characteristics system, it important accurately calculate stiffness damping bearings. Therefore, this paper, dynamic simple rotor-bearing were analyzed based on new model considering comprehensive bea...

For the wear problem of real rough surface during sliding friction, based on fractal theory and Hertz contact theory, a 3-D with random characteristics is constructed, relationship between deformation depth peak its area process derived. Furthermore, considering pit scratch phenomena surfaces in different states, time-varying calculation model worn compensation unworn are established, respectiv...

We consider a chain of monodisperse elastic grains of radius R where the grains are barely in contact. The grains repel upon contact via the Hertz-type potential, V proportional to delta(n), n > 2, where delta > or = 0, is the grain-grain overlap, delta identical with 2R-(u(i+1)-u(i)), where u(i) denotes the displacement of grain i from its original equilibrium position. This being a computatio...

the effect of geometry and material of the micro/nano particle on contact mechanic for manipulation was studied in this work based on atomic force microscopy. hertz contact model simulation for eph biological micro particle with spherical, cylindrical, and circular crowned roller shape was used to investigate the effect of geometry on contact simulation process in manipulation. then, to validat...