Results 41 to 50 of about 2,187,898 (350)
The Effects of Ship Noise on Marine Mammals—A Review
Frontiers in Marine Science, 2019 The number of marine watercraft is on the rise—from private boats in coastal areas to commercial ships crossing oceans. A concomitant increase in underwater noise has been reported in several regions around the globe. Given the important role sound plays
C. Erbe +5 more
semanticscholar +1 more source
Analysis on the fluid-structure interaction vibration characteristics of the elastic propeller
Zhongguo Jianchuan Yanjiu, 2020 [Objectives] In the flow field, vibration response characteristics of the elastic propeller are influenced by the interaction of the fluid and structure.[Methods] Based on the CFD/FEM fluid-structure interaction method,ANSYS-CFX modules on the Workbench ...
TAN Yuhang, PENG Weicai
doaj +1 more source
A Novel Acoustic Method for Cavitation Identification of Propeller
Journal of Marine Science and Engineering, 2022 When a propeller is under a state of cavitation, it will experience negative effects, including strong noise, vibration, and even damage to the blades.
Yang Li, Lilin Cui
doaj +1 more source
A Lightweight Network Model Based on an Attention Mechanism for Ship-Radiated Noise Classification
Journal of Marine Science and Engineering, 2023 Recently, deep learning has been widely used in ship-radiated noise classification. To improve classification efficiency, avoiding high computational costs is an important research direction in ship-radiated noise classification. We propose a lightweight
Shuang Yang +3 more
semanticscholar +1 more source
Large eddy simulation of the flow field in centrifugal fan and numerical prediction of noise in pipe
Zhongguo Jianchuan Yanjiu, 2019 [Objectives] In order to predict the vibration noise of centrifugal fan,[Methods] the whole flow field is meshed by the structured grid and the fluctuating force on the impeller surface that varies with time is obtained by using the Large Eddy Simulation(
Li Ya, Liu Zhongzu, Xu Yingbo, Zhang Nan
doaj +1 more source
Underwater Acoustic Nonlinear Blind Ship Noise Separation Using Recurrent Attention Neural Networks
Remote SensingShip-radiated noise is the main basis for ship detection in underwater acoustic environments. Due to the increasing human activity in the ocean, the captured ship noise is usually mixed with or covered by other signals or noise. On the other hand, due to
Ruiping Song +5 more
semanticscholar +1 more source
Remote Sensing, 2023 Fine-grained ship-radiated noise recognition methods of different specific ships are in demand for maritime traffic safety and general security. Due to the high background noise and complex transmission channels in the marine environment, the accurate ...
Shuai Liu +6 more
semanticscholar +1 more source
Observation of surface wave patterns modified by sub-surface shear currents [PDF]
, 2019 We report experimental observations of two canonical surface wave patterns --- ship waves and ring waves --- skewed by sub-surface shear, thus confirming effects predicted by recent theory.
Ellingsen, Simen Å. +2 more
core +2 more sources
Journal of the Acoustical Society of America, 2020 The Intensity Vector Autonomous Recorder (IVAR) simultaneously measures acoustic particle velocity and pressure. IVAR was deployed during the 2017 Seabed Characterization Experiment (SBCEX) with the primary objective to study sound propagation in fine ...
P. Dahl, D. Dall'Osto
semanticscholar +1 more source
Research on Feature Extraction of Ship-Radiated Noise Based on Multiscale Fuzzy Dispersion Entropy
Journal of Marine Science and Engineering, 2023 In recent years, fuzzy dispersion entropy (FDE) has been proposed and used in the feature extraction of various types of signals. However, FDE can only analyze a signal from a single time scale during practical application and ignores some important ...
Yuxing Li +3 more
semanticscholar +1 more source