Dynamics of Machinery

Model Reduction Technique for Analysing Friction-Induced Vibrations and Radiated Sound

“…Copyright  2018 Society of Automotive Engineers of Japan, Inc. All rights reserved friction related mechanisms are described in terms of modal coordinates (27)(28) . The authors are aware that the friction force is not a given external force and that the eigenvalues depend on the frictional contact, even when the most simple friction law is applied.…”

Research on the rigid-flexible multibody dynamics of concrete placing boom

“…The spring stiffness is calculated based on the equivalent stiffness of oil in two chambers, and the damping coefficient is obtained by the empirical formula [26].…”

“…For this reason, at first, the manipulator is divided into several substructures based on its structural feature [24,25]. The substructures, where the stiffness and damping of hydraulic cylinders [26] are taken into account and the features of slender rods and complex mechanisms are retained, are regarded as units, which are the foundation for the manipulator's modular modeling. Then, the transfer matrixes and transfer equations of each substructure are obtained according to the discrete time transfer matrix method.…”

Determination of the internal resistance of a hammer drill chisel

“…Information about the value of ξ for steel can be found in the bibliography. For example, the following intervals from 0.02 to 0,08; from 0.02 to 0.03 and from 0.0008 to 0.0025 are given respectively in (Chowdhury and Dasgupta, 2003;Chopra, 1995;Dresig and Holzweissig, 2006). In (Mevada and Patel, 2016) ξ was experimentally determined and the obtained value was 0.0069.…”