Vibration issues of floor areas in relation to human comfort perception an open working space are very common. This paper discusses the results a assessment before and after strengthening post-tensioned reinforced concrete flooring structure. All floors experience structural vibration, which arises from various sources inside outside building. investigated vibration issue problematic slab area ...

By location of a building in the vicinity of underground tube structure the effect of train operation excites the groundborne vibration. The solution of vibration transfer from the subsoil environment to the building structure is demonstrated using the example of a multistorey reinforced concrete building. The application of an elastic layer at foundation base level is used in order to eliminat...

A high-precision equipment is very sensitive to vibration, even micro vibration. How isolate the low-frequency broadband multidirectional vibration remains a challenge. As main component of piezoelectric smart isolation model, stack consists actuator, sensor, and rubber layer. The numerical results obtained by finite element method agree well with theoretical solutions. attenuates rapidly under...

This paper presents the design, fabrication and evaluation of magneto-rheological damper. Semi-active control devices have received significant attention in recent years because they offer the adaptability of active control devices without requiring the associated large power sources. Magneto-Rheological (MR) dampers are semiactive control devices that use MR fluids to produce controllable damp...

A higher-order sandwich theory is implemented in conjunction with an equivalent mobility-based power flow progressive method to determine power flow for a sandwich configured floating raft vibration isolation system. The power spectrum changes in whole frequency range effectively when core materials’ properties change. It is also shown that the loss factors of the sandwich configured floating r...

I recall someone once saying to me that “perception is reality.” But say this to scientists or engineers who need to take experimental data at midnight because their lab equipment is sensitive to even the minutest vibration and they may tell you otherwise. The reality is that imperceptible vibrations can and do impact sensitive experiments, and identifying the sources and selecting the proper e...