forced vibration analysis of machine tools’ hexapod table

Vibration Damping Analysis of Lightweight Structures in Machine Tools

The dynamic behaviour of a machine tool (MT) directly influences the machining performance. The adoption of lightweight structures may reduce the effects of undesired vibrations and increase the workpiece quality. This paper aims to present and compare a set of hybrid materials that may be excellent candidates to fabricate the MT moving parts. The selected materials have high dynamic characteri...

Axially Forced Vibration Analysis of Cracked a Nanorod

Thisstudy presents axially forced vibration of a cracked nanorod under harmonic external dynamically load. In constitutive equation of problem, the nonlocal elasticity theory is used. The Crack is modelled as an axial spring in the crack section. In the axial spring model, the nonrod separates two sub-nanorods and the flexibility of the axial spring represents the effect of the crack. Boundary ...

From Forced Vibration Testing

THE TECHNIQUE OF DETERMINATION OF STRUCTURAL PARAMETERS FROM FORCED VIBRATION TESTING Wai Fan Tsang This thesis details the results of an investigation into a technique for determination of "useful" structural parameters from forced vibration testing. The implementation of this technique to full scale civil engineering structures was achieved by several developments in the experimental and comp...

Virtual Manufacturing Tools for Collaborative Exploration of Hexapod Machine Capabilities and Applications

The Manufacturing Engineering Laboratory (MEL) of the National Institute of Standards and Technology (NIST) has recently initiated the National Advanced Manufacturing Testbed (NAMT). This is a testbed to demonstrate how machines, software, and people can be efficiently and effectively networked together to improve productivity and foster innovation at all levels of a manufacturing enterprise. "...

Second-order ICA in machine vibration analysis

Free and Forced Transverse Vibration Analysis of Moderately Thick Orthotropic Plates Using Spectral Finite Element Method

In the present study, a spectral finite element method is developed for free and forced transverse vibration of Levy-type moderately thick rectangular orthotropic plates based on first-order shear deformation theory. Levy solution assumption was used to convert the two-dimensional problem into a one-dimensional problem. In the first step, the governing out-of-plane differential equations are tr...