Structure-borne noise is an important aspect of offshore platform sound field. It can be generated either directly by vibrating machineries induced mechanical force, indirectly by the excitation of structure or excitation by incident airborne noise. Therefore, limiting of the transmission of vibration energy throughout the offshore platform is the key to control the structureborne noise. This i...

Induction motors and the generators ofen have problems associated with noise and vibration. Consequently,there is need for prediction of noise and vibration during the design of these machines.The Finite Element Modeling(FEM) method is used for the prediction and evaluation of natural frequencies and mode shapes of electrical equipment.However, FEM is ofen very difficalt,becouse of the influenc...

The 'Tire Pavement Test Apparatus (TPTA)' at Purdue University is a device that was originally developed to study tire's air-borne noise radiation in the frequency range 300 Hz 2 kHz. However, recent years, has mainly been used quantify contribution structure-borne by measuring force and acceleration hub. Hence, of interest shifted frequencies below Hz. By comparing measurements FE simulations,...

Cavitation is an essential factor in the deterioration of hydraulic performance centrifugal pumps. The study cavitation fault diagnosis can help avoid or reduce damage it causes. vibration and noise analysis method predict incipient more accurately. In order to improve accuracy diagnosis, this paper studies distribution measuring points for pump diagnosis. research object a with inducer splitte...

Vibrations are phenomenon caused due to cyclic motion by certain amplitude and frequency. The ground borne vibrations hinder the building stability durability. In present study, impact of is reduced with fly ash Infilled barrier. Different soils samples collected density determined using standard compaction test. Density vibration waves inversely proportional each other, that higher lower propa...

When trains run on soft ground, large deflections of the track and vibration of the ground can occur when the train speed approaches the speed of Rayleigh waves in the ground. Modelling is helpful to understand and mitigate such critical velocity effects. Here, a three-dimensional time-domain model of a load moving on a track and ground has been developed in the finite element software ABAQUS. ...

Knowledge of the biology a pest is essential for building sustainable management programmes. Pentatomidae have hemimetabolous life cycle with egg, nymphal, and adult stages, which differ in morphological, ecological, behavioural traits. Some these traits, such as mating behaviour, pheromones (alarm aggregation pheromones) acquisition gut symbionts can be targeted strategies. Here, we review ava...

This paper deals with the numerical computation of the structural and acoustic response of a building to an incoming wave field generated by high-speed surface railway traffic. The source model consists of a moving vehicle on a longitudinally invariant track, coupled to a layered ground modelled with a boundary element formulation. The receiver model is based on a substructuring formulation and...