It's important to understand the dynamic behavior of a structure under operating condition from the view point of vibration shapes of a structure on well excited frequency components and accurate identification of amplitude on each point of a structure. Operating Deflection Shapes (ODSs) can be defined for nonlinear and non stationary structural motion. ODSs provide very useful information for ...

This presentation investigates Active Structural Acoustic Control (ASAC) of rotating machinery with high modal density, by placing actuators as close as possible to the noise source. For this purpose, an experimental set-up has been built, as discussed in [3]. The set-up consists of a shaft supported by two bearings, of which one is made “active” by mounting piezo-actuators around it, to influe...

F(o)F(1)-ATPase is a rotary motor protein synthesizing ATP from ADP driven by a cross-membrane proton gradient. The proton flow through the membrane-embedded F(o) generates the rotary torque that drives the rotation of the asymmetric shaft of F(1). Mechanical energy of the rotating shaft is used by the F(1) catalytic subunit to synthesize ATP. It was suggested that elastic power transmission wi...

Detection of early-stage misalignment the ball screw in feed drive systems is topic addressed this study. The triaxial vibration amplitudes and phases a rotating at nut were extracted using Vold–Kalman filtering order tracking (VKFOT). locus rotation speed its multiplier time domain then constructed to obtain corresponding holospectra. By self-organizing map, features various holospectra quanti...

in this paper a double-shaft turbofan engine is considered to be in the design phase. therefore its environmental condition and critical source of failures has been studied and the subsystems and components has been identified. since it is in design phase, the project encounters to the lack of specified failure data. to overcome this problem, the generic data or expert judgments on the basis of...

This article describes the design of a journal bearing test platform capable high-accuracy film thickness measurements via ultrasonic transducers permanently embedded in both and rotating shaft. A bespoke hydraulic loading system with programmable valves allowed application dynamic loads defined patterns, including simulation patterns found real components such as automotive connecting rod bear...