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Gotowa bibliografia na temat „Radiated noise”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 4 lutego 2022

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Artykuły w czasopismach na temat "Radiated noise"

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Zhu, Zhibo, Wei Yan, Yongan Wang, Yang Zhao, Tao Zhang i Junshuo Huang. "Noise Analysis Method of Radiated EMI based on Non-linear Principal Component Analysis". Applied Computational Electromagnetics Society 35, nr 10 (8.12.2020): 1144–52. http://dx.doi.org/10.47037/2020.aces.j.351006.

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Aiming at the radiated electromagnetic interference (EMI) noise of electronic equipment, a novel method of radiated EMI noise analysis based on non-linear principal component analysis (NLPCA) algorithm is proposed in this paper. In order to obtain multiple independent common-mode / differential-mode radiated sources, and to find the sources that cause the radiated noises that exceed the limit of standard, NLPCA algorithm is used to process the near-field radiated signals superimposed by multiple radiated sources. The simulation results show that NLPCA can successfully screen out the radiated EMI noises which exceed the limit of standard. Moreover, the experiments are carried out with three models: double-common-mode hybrid sources, double-differential-mode hybrid sources and common-differential-mode hybrid sources. Compared with the traditional independent component algorithm (ICA), the method proposed in this paper can separate the radiated EMI noise sources more accurately and quickly. It can be concluded that the accuracy of NLPCA algorithm is 10% higher than ICA algorithm. This work will contribute to trace the radiated EMI noise sources, and to provide the theoretical basis for the future suppression.

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Skudrzyk, Eugen J. "Radiated flow noise". Journal of the Acoustical Society of America 87, S1 (maj 1990): S79—S80. http://dx.doi.org/10.1121/1.2028373.

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Son, Gwan-Hee, Beom-Soo Kim, Seung-Je Cho i Young-Jun Park. "Optimization of the Housing Shape Design for Radiated Noise Reduction of an Agricultural Electric Vehicle Gearbox". Applied Sciences 10, nr 23 (26.11.2020): 8414. http://dx.doi.org/10.3390/app10238414.

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As the demand for agricultural electric vehicles increases, it is becoming important to conduct noise reduction in consideration of the characteristics of an electric powertrain. This study was conducted to optimize the shape design of gearbox housing for radiated noise reduction of an agricultural electric vehicle gearbox. The noise and vibration of the gearbox were measured considering the noise characteristics of the electric vehicle gearbox, which radiates high-frequency pure tone noise. The main noise source radiated by the structural vibration of the gearbox housing was identified and considered when modeling the loading conditions in the numerical analysis. To improve the reliability, the finite element (FE) model was updated and validated. Internal machine elements were modeled as a substructure through a reduced-order modeling method to reduce the computing time and apply a constant gear excitation force. The weak areas of structure were determined and it was used as the design area for optimization. The topology optimization technique was used to reduce the equivalent radiated power (ERP) which was used as an indicator of radiated noise level. The maximum value of the ERP decreased under all operating conditions at the rated speed.

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Zhang, Qing Qing, Yi Qi Zhou i Liang Liang Fan. "Radiated Noise Source Localization of Hydraulic Excavator Based on Wavelet Packet Analysis". Applied Mechanics and Materials 415 (wrzesień 2013): 409–13. http://dx.doi.org/10.4028/www.scientific.net/amm.415.409.

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Collect a hydraulic excavators radiated noise ten meters away under set conditions, and also the relevant noises near the excavator. Analyze noise signals with wavelet packet to get the main band of energy distribution. Then calculate the two signals correlation coefficient, which identifies the muffler exhaust noise and inlet noise as the main source for right rear radiated noise.

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Yu, Changshuai, Zhong Luo, Haitao Luo, Siwei Guo, Guangming Liu i Zhenxin Li. "Noise simulation and low noise design of skinned panel structure of scientific experiment rack". MATEC Web of Conferences 336 (2021): 01002. http://dx.doi.org/10.1051/matecconf/202133601002.

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The noise of the scientific experiment rack radiates into the space station through the skinned structure, which directly affects the safety and health of astronauts in orbit for a long time, so it is necessary to carry out low-noise design. Firstly, the finite element model of the panel structure is established, and the correctness of the model is verified by modal test. Secondly, select a point as the vibration excitation point on the finite element model of the plate structure to simulate the vibration input of the excitation source, obtain its vibration response through the modal superposition method, take the vibration response as the boundary condition of the acoustic boundary element, use the modal acoustic transfer vector technology to calculate the radiation noise of the plate structure, and verify it through the noise test in the half anechoic chamber. Then, the acoustic pressure contribution analysis of the radiated noise from the skinned panel structure is carried out, and the panel area which can reduce the radiated noise of the target is determined. The constrained damping layer is applied in this area. The results show that the radiated noise at the target position is significantly reduced.

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Li, Zhaoxi, Yaan Li i Kai Zhang. "A Feature Extraction Method of Ship-Radiated Noise Based on Fluctuation-Based Dispersion Entropy and Intrinsic Time-Scale Decomposition". Entropy 21, nr 7 (15.07.2019): 693. http://dx.doi.org/10.3390/e21070693.

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To improve the feature extraction of ship-radiated noise in a complex ocean environment, fluctuation-based dispersion entropy is used to extract the features of ten types of ship-radiated noise. Since fluctuation-based dispersion entropy only analyzes the ship-radiated noise signal in single scale and it cannot distinguish different types of ship-radiated noise effectively, a new method of ship-radiated noise feature extraction is proposed based on fluctuation-based dispersion entropy (FDispEn) and intrinsic time-scale decomposition (ITD). Firstly, ten types of ship-radiated noise signals are decomposed into a series of proper rotation components (PRCs) by ITD, and the FDispEn of each PRC is calculated. Then, the correlation between each PRC and the original signal are calculated, and the FDispEn of each PRC is analyzed to select the Max-relative PRC fluctuation-based dispersion entropy as the feature parameter. Finally, by comparing the Max-relative PRC fluctuation-based dispersion entropy of a certain number of the above ten types of ship-radiated noise signals with FDispEn, it is discovered that the Max-relative PRC fluctuation-based dispersion entropy is at the same level for similar ship-radiated noise, but is distinct for different types of ship-radiated noise. The Max-relative PRC fluctuation-based dispersion entropy as the feature vector is sent into the support vector machine (SVM) classifier to classify and recognize ten types of ship-radiated noise. The experimental results demonstrate that the recognition rate of the proposed method reaches 95.8763%. Consequently, the proposed method can effectively achieve the classification of ship-radiated noise.

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Chen, Zhe, Yaan Li, Renjie Cao, Wasiq Ali, Jing Yu i Hongtao Liang. "A New Feature Extraction Method for Ship-Radiated Noise Based on Improved CEEMDAN, Normalized Mutual Information and Multiscale Improved Permutation Entropy". Entropy 21, nr 6 (25.06.2019): 624. http://dx.doi.org/10.3390/e21060624.

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Extracting useful features from ship-radiated noise can improve the performance of passive sonar. The entropy feature is an important supplement to existing technologies for ship classification. However, the existing entropy feature extraction methods for ship-radiated noise are less reliable under noisy conditions because they lack noise reduction procedures or are single-scale based. In order to simultaneously solve these problems, a new feature extraction method is proposed based on improved complementary ensemble empirical mode decomposition with adaptive noise (ICEEMDAN), normalized mutual information (norMI), and multiscale improved permutation entropy (MIPE). Firstly, the ICEEMDAN is utilized to obtain a group of intrinsic mode functions (IMFs) from ship-radiated noise. The noise reduction process is then conducted by identifying and eliminating the noise IMFs. Next, the norMI and MIPE of the signal-dominant IMFs are calculated, respectively; and the norMI is used to weigh the corresponding MIPE result. The multi-scale entropy feature is finally defined as the sum of the weighted MIPE results. Experimental results show that the recognition rate of the proposed method achieves 90.67% and 83%, respectively, under noise free and 5 dB conditions, which is much higher than existing entropy feature extraction algorithms. Hence, the proposed method is more reliable and suitable for feature extraction of ship-radiated noise in practice.

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Mohd Haris, Siti Nur Aishah, Mohamed Sukri Mat Ali, Sheikh Ahmad Zaki Shaikh Salim, Sallehuddin Muhamad i Muhammad Iyas Mahzan. "Numerical Simulation of Noise Radiated from a Blunt Trailing Edge". Applied Mechanics and Materials 629 (październik 2014): 3–8. http://dx.doi.org/10.4028/www.scientific.net/amm.629.3.

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The Lighthill acoustic analogy is applied to estimate the noise radiation from ﬂow over a blunt trailing edge. The blunt trailing edge is an effective vortex generator. Periodic vortex shedding near the trailing edge induces ﬂuctuating lift that radiates a strong Aeolian tone. The frequency of the Aeolian tone is similar to that of the vortex shedding. A 50.1 dB of Aeolian tone level is radiated from this blunt trailing edge.

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Dahl, Milo D., i Philip J. Morris. "Supersonic Jet Noise Reductions Predicted With Increased Jet Spreading Rate". Journal of Fluids Engineering 120, nr 3 (1.09.1998): 471–76. http://dx.doi.org/10.1115/1.2820686.

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In this paper, predictions are made of noise radiation from single, supersonic, axisymmetric jets. We examine the effects of changes in operating conditions and the effects of simulated enhanced mixing that would increase the spreading rate of the jet shear layer on radiated noise levels. The radiated noise in the downstream direction is dominated by mixing noise and, at higher speeds, it is well described by the instability wave noise radiation model. Further analysis with the model shows a relationship between changes in spreading rate due to enhanced mixing and changes in the far field radiated peak noise levels. The calculations predict that enhanced jet spreading results in a reduction of the radiated peak noise level.

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Lu, Ding Ding, i Lin He. "Real-Time Calculation of Noise Radiated by Ship Structure via Machinery Exciting Force Estimation". Applied Mechanics and Materials 226-228 (listopad 2012): 87–91. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.87.

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A method which combines the estimation of machinery exciting force and mechano-acoustical transfer function is proposed in this paper to predict real-time radiated noise by ship structure. The measurement methods of mechano-acoustical and mechano-vibrational transfer functions which are used in radiated noise calculation are described. The feasibility and accuracy are verified by an underwater model experiment. Measurement and calculation results are consistent. The average error of the exciting force estimation is about 2dB, and the average error of radiated noise pressure calculation is about 3dB. The accuracy of the radiated noise calculation is directly affected by exciting forces estimation errors, which can be corrected by a correction factor to increase the accuracy of radiated noise calculation effectively.

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Rozprawy doktorskie na temat "Radiated noise"

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Chiasson, Leo E. "Radiated noise from a three dimensional truss". Thesis, Monterey, California. Naval Postgraduate School, 1995. http://hdl.handle.net/10945/26192.

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Chiasson, Leo E. Jr. "Radiated noise from a three dimensional truss". Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36058.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1995, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
Includes bibliographical references (leaves 83-84).
by Leo E. Chiasson, Jr.
M.S.

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Charpentier, Arnaud. "Active Control Of Noise Radiated From Personal Computers". Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/35711.

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As an indirect consequence of increased heat cooling requirements, personal computers (PC) have become noisier due to the increased use of fans. Hard disk drives also contribute to the annoying noise radiated by personal computers, creating a need for the control of computer noise. Due to size constraints, the implementation of passive noise control techniques in PC is difficult. Alternatively, active noise control (ANC) may provide a compact solution to the noise problems discussed above, which is the subject of this work. First, the computer noise sources were characterized. The structure-borne path was altered passively through the decoupling of the vibrating sources from the chassis. Global noise control strategy was then investigated with a hybrid passive/active noise control technique based on folded lined ducts, integrating microphones and speakers, that were added to the PC air inlet and outlet. While the ducts were effective above 1000Hz, the use of a MIMO adaptive feedforward digital controller lead to significant noise reduction at the ducts outlets below 1000Hz. However, global performance was limited due to important airborne flanking paths. Finally, the same type of controller was used to create a zone of quiet around the PC user head location. It was implemented using multimedia speakers and microphones, while the computer was placed in a semi-reverberant environment. A large zone of quiet surrounding the head was created at low frequencies (250Hz), and its size would reduce with increasing frequency (up to 1000Hz).
Master of Science

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Awasthi, Manuj. "Sound Radiated from Turbulent Flow over Two and Three-Dimensional Surface Discontinuities". Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/64158.

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Measurements have been performed to understand the sound source mechanism in turbulent boundary layer flow over two and three-dimensional surface discontinuities whose height is smaller than the incoming boundary layer thickness. The work was performed in two different types of boundary layers: a wall-jet flow and a conventional high Reynolds boundary layer. In the wall-jet flow, measurements of far field sound from two-dimensional forward facing steps, gaps with rounded corners and swept forward facing steps with rounded corners were made. The sound from a forward facing step is shown to exhibit effects of non-compactness. Rounding the step corner results in consistent drop in sound levels but the directivity of the sound field remains unchanged. The sound from gaps is dominated by the forward step component and remains unaffected by rounding of the backward step portion. The sound from swept forward facing steps was found to approximately obey an acoustic sweep independence principle up to a sweep angle of 30 deg when the spanwise inhomogeneity in the flow is accounted for using a simple source distribution model. Sweep independence is also observed for steps with corner rounding radii up to 25% of the step height. The work performed in the high Reynolds number boundary layer included measurements on forward facing steps with rounded corners and a three-dimensional circular embossment with the same height as the forward step. The highest Reynolds number based on discontinuity height achieved in this work was approximately 93,000. The results show that rounding the forward step corner has the same qualitative effect on far field sound as in the wall-jet boundary layer. Quantitatively, for similar boundary layer edge velocity the sound is higher than in the wall-jet flow. The near field measurements show that the separation bubble downstream of the step shrinks as the step corner is rounded while the bubble upstream remains unaffected by it. The unsteady surface force in the lower half of the vertical face of the step was found to be independent of corner rounding. The force on the downstream surface shows similar character within the separation bubble for each rounding but decays faster with increasing downstream distance due to reduced bubble size. The unsteady force measurements were applied to the theory of Glegg et al. (2014) and the resultant of the unsteady forces on the vertical face and downstream surface placed at the top corner of the step is shown to qualitatively describe the far field sound. The acoustic sweep independence principle was applied to the far field sound from the circular embossment and it has been shown that the sound from the three-dimensional geometry can be predicted with reasonable accuracy using sound from a two-dimensional forward step with the same span.
Ph. D.

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Haikonen, Kalle. "Underwater radiated noise from Point Absorbing Wave Energy Converters : Noise Characteristics and Possible Environmental Effects". Doctoral thesis, Uppsala universitet, Elektricitetslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-235016.

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The conversion of wave energy into electrical energy has the potential to become a clean and sustainable form of renewable energy conversion. However, like all forms of energy conversion it will inevitably have an impact on the marine environment, although not in the form of emissions of hazardous substances (gases, oils or chemicals associated with anticorrosion). Possible environmental issues associated with wave energy conversion include electromagnetic fields, alteration of sedimentation and hydrologic regimes and underwater radiated noise. Underwater noise has the potential to propagate over long distances and thus have the potential to disturb marine organisms far away from the noise source. There is great variation in the ability to perceive sound between marine organisms, one sound that is clearly audible to one species can be completely inaudible to another. Thus, to be able to determine potential environmental impact from WECs associated with underwater noise, the noise radiated from the WECs must be known. This thesis presents results from studies on the underwater radiated noise from four different full-scale WECs in the Lysekil Wave Power Project. Hydrophones were used to measure the underwater radiated noise from operating point absorbing linear WECs. The main purpose was to study the radiated noise from the operating WECs with emphasis on characteristics such as spectrum levels, Sound Pressure Level (SPL), noise duration and repetition rate. This to be able to determine the origin of the noise and if possible, implement design changes to minimize radiated noise. The results identified two main operational noises (transients with the bulk of the energy in frequencies <1 kHz). The SPL of the radiated noise fluctuated significantly, depending on wave height. Broadband SPLrms of the measurements ranged between ~110 dB and ~140 dB re 1 µPa and SPLpeak of specific noises ranges between ~140 and ~180 dB re µPa. Audibility was estimated range from 1km to 15 km depending critically on species and on assumptions of propagation loss. The noise is not expected to have any negative effects on behaviour or mask any signals, unless in the vicinity (<150m) of the WECs in significant wave heights. No physical damage, even in close vicinity are expected on either fish or marine mammals. Having the aim to have as little impact on the environment a possible, these studies are important. This way precautions can be implemented early in the technical development of this kind of renewable energy converters. The benefits from the WECs the Lysekil wave power project are believed to outweigh possible environmental impacts due to underwater radiated noise.

Vid avhandlingens tryckläggning upptäcktes inte att tidpunkt för disputation var fel.

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Burgemeister, Kym A. "Novel methods of transduction for active control of harmonic sound radiated by vibrating surfaces". Title page, contents and abstract only, 1996. http://hdl.handle.net/2440/37932.

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Large electric transformers such as those used in high voltage substations radiate an annoying low frequency hum into nearby communities. Attempts have been made to actively control the noise by placing a large number of loudspeakers as control sources around noisy transformers to cancel the hum. These cancellation systems require a large number of loudspeakers to be successful due to the imposing size of the transformer structures. Thus such systems are very expensive if global noise reduction is to be achieved. The aim of this thesis is to investigate theoretically and experimentally the use of thin perforated panels closely placed to a heavy structure to reduce the radiation of unwanted harmonic noise. These panels can themselves be vibrated to form a control source radiating over a large surface surrounding the primary source. The problem of the equipment overheating inside the enclosure is alleviated because the holes in the panels still allow natural cooling. An initial study is carried out to determine the resonance frequencies of perforated panels. The use of previously determined effective elastic properties of the panels and Finite Element Analysis to theoretically calculate their resonance frequencies is examined. Secondly the attenuation provided by active noise control using perforated panels as control sources is explored by use of a coupled analysis, where the primary source is assumed to influence the radiation of the perforated control panel. This analysis was found to predict poorly the amount of attenuation that could be achieved, so an uncoupled analysis is undertaken, where both the primary and control sources are assumed to radiate independently of each other. Not only does this greatly simplify the theoretical analysis but it also enables prediction of attenuation levels which are comparable to those determined experimentally. The theoretical model is reformulated to enable comparison of the sound power attenuation provided by perforated panel control sources with that of traditional acoustic and structural control sources. Finally, the use of modal filtering of traditional acoustic error sensor signals to give transformed mode (or power mode) sensors is examined. The independently radiating acoustic transformed modes of the panel are determined by an eigenanalysis and a theoretical analysis is presented for a farfield acoustic power sensor system to provide a direct measurement of the total radiated acoustic power. The frequency dependence of the sensor system, and the amount of global sound power attenuation that can be achieved is examined. Experimental measurements are made to verify the theoretical model and show that a sound power sensor implemented with acoustic sensors can be used in a practical active noise control system to increase the amount of attenuation that can be achieved. Alternatively the sound power sensor can be used to reduce the number of error channels required by a control system to obtain a given level of attenuation when compared to traditional error criteria. The power mode sensor analysis is then applied to the perforated panel control system, with similar results.
Thesis (Ph.D.)--Engineering (Department of Mechanical Engineering), 1996.

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Shen, Anne Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Optimised reduction of the radiated noise from the casing of a constant speed gearbox". Publisher:University of New South Wales. Mechanical & Manufacturing Engineering, 2008. http://handle.unsw.edu.au/1959.4/43020.

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This thesis presents a comprehensive methodology for predicting and minimising the noise radiated from a constant speed gearbox assembly by means of attaching optimally placed stiffening ribs on the casing. The procedure involves building an FE model of the gearbox, which is updated using modal parameters extracted from a modal test. This is followed by synthesis of the required FRFs with respect to the forcing degrees-of-freedom. The forces, which are assumed to act only at the bearings are identified from these FRFs and the measured operational velocities of the casing. The identified forces are then used to excite the updated FE model to re-calculate the vibration velocities. A boundary element method is used to calculate the final radiated sound power to be compared with that measured. The same forces are used later to excite the modified gearbox casing to determine the improvement given by optimised modification. The optimisation study minimises the vibration energy of the casing in 10% bands around critical frequencies, in this case the first two harmonics of the gearmesh frequency. To allow for errors in the model, the excitation is by white noise, so as to produce wide stop bands, rather than minimising the response at particular frequencies. The vibration energy is weighted for radiation efficiency, A-weighting, and relative source strength in the bands. The final optimal stiffener layout is validated through a final vibration and acoustic calculation on the updated gearbox model using the forces identified in the earlier steps. The study of one particular gearbox concludes that i) the proposed hybrid optimisation scheme produces a theoretical effective noise reduction of 3 dBA for the total sound power. ii) Because the gearmesh harmonics were targeted, a further 5 dB improvement was effectively gained by eliminating the tonal penalty which otherwise applied. iii) From plate studies it was demonstrated that the stiffening ribs could be attached using epoxy cement (to avoid welding) and that the properties of the cemented joint could be determined by model updating after attaching one rib, so as to obtain a better prediction of the final optimised result.

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Risi, John D. "Analytical investigation of active control of radiated inlet noise from turbofan engines". Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-08222009-040623/.

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Song, Kyungyeol 1972. "Active control of radiated noise from a cylindrical shell using external piezoelectric panels". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/29244.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.
Includes bibliographical references (p. 285-290).
Control architectures and methodologies are developed for the reduction of radiated noise from a thick-walled cylindrical shell using external piezoelectric panels. The proposed approach is to cover the shell's outer surface with curved active composite panels, and to reduce the radiated noise by controlling the motion of each panel's outer surface (i.e., the radiating surface), instead of the shell's outer surface. The use of external piezoelectric panels proposed in this thesis has significant advantages over the conventional approach of directly controlling the structure in reducing radiated noise from stiff structures. The reason is that the proposed approach needs much less control authority, and allows the control system to be significantly less dependent on the dynamic characteristics of the structure, than the conventional approach. The control architecture is composed of local controllers, which are implemented for each panel to reduce its vibration level, and a global controller, which makes the shell a weak radiator by coordinating all of the panels simultaneously. For each local control, two different feedback controllers are implemented simultaneously. The first feedback controller takes the acceleration of the outer surface of each panel and uses high gain to minimize its motion. The other feedback loop, which is denoted as the feedforward controller in this thesis, takes acceleration on the inside surface of the panel and aims at canceling the motion of radiating surface. Several controller configurations were designed, implemented and compared, in order to find the one that is the simplest to implement, while achieving the required closed-loop performance and stability margins.
(cont.) After covering the surface of the cylindrical shell with active composite panels, the panel-level tonal controllers were designed and implemented on the shell vibrating in water. The controllers yielded more than 20 dB of attenuation at the target frequency in the acceleration over the radiating surface, although the actual noise level was increased under closed-loop control due to the flaws in the internal accelerometers in the panels. For global control, a new wavenumber domain sensing method has been developed and applied to feedback controller design for active structural acoustic control. The approach is to minimize the total acoustic power radiated from vibrating structures in the wavenumber domain. We found that the method greatly simplifies the design of MIMO LQG controllers for active structural acoustic control, by reducing the effort to model the acoustic radiation from the structure, and by reducing significantly the number of transfer functions that should be identified to get a plant model. The new sensing method was numerically validated on a beam structure and a cylindrical shell with active composite panels mounted.
by Kyungyeol Song.
Ph.D.

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Laws, Nathan. "A Parabolic Equation Analysis of the Underwater Noise Radiated by Impact Pile Driving". PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/1083.

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Impact pile driving can produce extremely high underwater sound levels, which are of increasing environmental concern due to their deleterious effects on marine wildlife. Prediction of underwater sound levels is important to the assessment and mitigation of the environmental impacts caused by pile driving. Current prediction methods are limited and do not account for the dynamic pile driving source, inhomogeneities in bathymetry and sediment, or physics-based sound wave propagation. In this thesis, a computational model is presented that analyzes and predicts the underwater noise radiated by pile driving and is suitable for shallow, inhomogeneous environments and long propagation ranges. The computational model uses dynamic source models from recent developments in the technical literature. Pile source models are coupled to a broadband application of the range-dependent acoustic model (RAMPE), a standard parabolic equation (PE) propagation code capable of modeling wave propagation through complex, range dependent environments. Simulation results are shown to be in good agreement with several observations of pile driving operations in the Columbia River between Portland, Oregon and Vancouver, Washington. The model is further applied to extend sound level predictions over the entire river and study the effects of sediment and bathymetry on the underwater sound levels present in the environment.

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Książki na temat "Radiated noise"

1

Lilley, G. M. The radiated noise from isotropic turbulence revisited. Hampton, Va: Institute for Computer Applications in Science and Engineering, 1993.

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Chiasson, Leo E. Radiated noise from a three dimensional truss. Springfield, Va: Available from National Technical Information Service, 1995.

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Mardiguian, Michel. Controlling radiated emissions by design. New York: Van Nostrand Reinhold, 1992.

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Controlling radiated emissions by design. Wyd. 2. Boston, MA: Kluwer Academic Publishers, 2001.

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Mardiguian, Michel. Controlling radiated emissions by design. Wyd. 2. New York: Springer Science+Business Media, LLC, 2001.

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Yates, John E. Analysis of the surface load and radiated sound of a vibrating airfoil with application to the experiment of Brooks. Washington, D.C: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Rubinstein, Robert. Time correlations and the frequency spectrum of sound radiated by turbulent flows. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1997.

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Center, Langley Research, red. The radiated noise from isotropic turbulence revisited. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1994.

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B, Oswald Fred, i United States. National Aeronautics and Space Administration., red. Influence of gear design parameters on gearbox radiated noise. [Washington, D.C.]: National Aeronautics and Space Administration, 1994.

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Mardiguian, Michel. Controlling Radiated Emissions by Design. Springer, 2016.

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Części książek na temat "Radiated noise"

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Lourens, J. G. "Classification of Ships Using Underwater Radiated Noise". W Underwater Acoustic Data Processing, 591–96. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2289-1_66.

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Lan, Chao, ShengKun Shi i JingQiong Wang. "A Method to Suppress Radiated Noise of ARINC659". W Lecture Notes in Electrical Engineering, 400–408. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-33-4102-9_49.

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Chapman, N. Ross, Reza M. Dizaji i R. Lynn Kirlin. "Inversion of geoacoustic model parameters using ship radiated noise". W Acoustic Sensing Techniques for the Shallow Water Environment, 289–302. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/978-1-4020-4386-4_22.

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Rudd, Alexis B., Michael F. Richlen, Alison K. Stimpert i Whitlow W. L. Au. "Radiated Sound of a High-Speed Water-Jet-Propelled Transportation Vessel". W The Effects of Noise on Aquatic Life II, 951–56. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-2981-8_117.

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Lilley, Geoffrey M. "On the Noise Radiated from a Turbulent High Speed Jet". W ICASE/NASA LaRC Series, 85–115. New York, NY: Springer New York, 1993. http://dx.doi.org/10.1007/978-1-4613-8342-0_5.

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Chevalier, Frédérique, i Christian Audoly. "Turbulent Flow-Induced Self Noise and Radiated Noise in Naval Systems—An Industry Point of View". W Flinovia - Flow Induced Noise and Vibration Issues and Aspects, 211–25. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09713-8_10.

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Coetzer, M. W., i J. G. Lourens. "Signal Processing Techniques to Analyse and Simulate Radiated Underwater Ship Propeller Noise". W Adaptive Methods in Underwater Acoustics, 679–86. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5361-1_58.

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Stiebel, D., C. Gerbig, B. Schewe, M. Neudeck, Christian Frank, P. Tecklenburg i B. Asmussen. "A New Guideline to Reduce Noise Radiated by Railway Bridges in Germany". W Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 699–706. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70289-2_77.

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Meyer, Valentin, Laurent Maxit, Oriol Guasch i Mahmoud Karimi. "Noise Radiated from Fluid Loaded Stiffened Cylindrical Shells Subject to a Turbulent Boundary Layer". W Flinovia—Flow Induced Noise and Vibration Issues and Aspects-III, 259–78. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64807-7_12.

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Dupont, Jean-Baptiste, i Henri Saucy. "Noise radiated by electric motors – simulation process and overview of the optimization approaches". W Proceedings, 107–21. Wiesbaden: Springer Fachmedien Wiesbaden, 2019. http://dx.doi.org/10.1007/978-3-658-20251-4_7.

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Streszczenia konferencji na temat "Radiated noise"

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Stout, Joseph L. "Concept Level Powertrain Radiated Noise Analysis". W Noise & Vibration Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1999. http://dx.doi.org/10.4271/1999-01-1746.

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Pilo, Luigi, Francesco Gamba i Bernard J. Challen. "Prediction of Vehicle Radiated Noise". W SAE Noise and Vibration Conference and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1997. http://dx.doi.org/10.4271/971985.

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Zhou, Ming, Jim Emery, Steven H. Dropps i Mario Felice. "Exhaust Manifold Radiated Noise Prediction Methodology". W SAE 2001 Noise & Vibration Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-1433.

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Wang, Lian S., Stephen P. Robinson, Pete Theobald, Paul A. Lepper, Gary Hayman i Victor F. Humphrey. "Measurement of radiated ship noise". W ECUA 2012 11th European Conference on Underwater Acoustics. Acoustical Society of America, 2013. http://dx.doi.org/10.1121/1.4792663.

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Burdisso, Ricardo A., Russell H. Thomas, Chris R. Fuller i Walter F. O'Brien. "Active Control of Radiated Inlet Noise from Turbofan Engines". W Noise & Vibration Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1993. http://dx.doi.org/10.4271/931285.

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Blanc, P., i E. Landel. "Noise radiated by a flow singularity". W 4th AIAA/CEAS Aeroacoustics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1998. http://dx.doi.org/10.2514/6.1998-2210.

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Narayan, Sunny. "Modeling of Noise Radiated from Engines". W The 11th International Conference on Automotive Engineering. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2015. http://dx.doi.org/10.4271/2015-01-0107.

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Li, Fan, Stephen D. Sibal, Ian Francis McGann i Raphael Hallez. "Radiated Fuel Tank Slosh Noise Simulation". W SAE 2011 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2011. http://dx.doi.org/10.4271/2011-01-0495.

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Wang, Yanran, i Kai Abrahamsen. "Control of Ship Radiated Underwater Noise". W OCEANS 2019 MTS/IEEE SEATTLE. IEEE, 2019. http://dx.doi.org/10.23919/oceans40490.2019.8962608.

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Farahanchi, Faramarz, David Griffiths, Anthony S. Mason i Thomas A. Mayer. "Experimental Analysis of Interior Noise Due to Powerplant Radiated Noise". W SAE Noise and Vibration Conference and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1995. http://dx.doi.org/10.4271/951266.

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Raporty organizacyjne na temat "Radiated noise"

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Samimy, M., J. Hileman, E. Caraballo i B. Thurow. Correlation of Flow Structures and Radiated Noise in High Speed Jets. Fort Belvoir, VA: Defense Technical Information Center, kwiecień 2004. http://dx.doi.org/10.21236/ada423107.

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Okura, Kiyoshi, i Yoshihiko Tatsumi. Analysis of Squeal Noise Radiated From Serpentine Belt for Accessories Drive Systems. Warrendale, PA: SAE International, wrzesień 2005. http://dx.doi.org/10.4271/2005-08-0644.

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Laws, Nathan. A Parabolic Equation Analysis of the Underwater Noise Radiated by Impact Pile Driving. Portland State University Library, styczeń 2000. http://dx.doi.org/10.15760/etd.1083.

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Crawford, M. L. Band-limited, white gaussian noise excitation for reverberation chambers and applications to radiated susceptibility testing. Gaithersburg, MD: National Bureau of Standards, 1996. http://dx.doi.org/10.6028/nist.tn.1375.

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Barber, D. C., i Brian Fowler. Estimating Free Field, Far Field Radiated Noise Source Levels from Measurements Acquired in a Harbor Environment. Fort Belvoir, VA: Defense Technical Information Center, październik 2012. http://dx.doi.org/10.21236/ada568708.

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