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Статті в журналах з теми "Vibration measurement on board ship"
Coppotelli, Giuliano, Daniele Dessi, Riccardo Mariani, and Marcello Rimondi. "Output-Only Analysis for Modal Parameters Estimation of an Elastically Scaled Ship." Journal of Ship Research 52, no. 01 (March 1, 2008): 45–56. http://dx.doi.org/10.5957/jsr.2008.52.1.45.
Повний текст джерелаMatsumoto, Tomoya. "Differences in Noise Measurement Methods : Code on Noise Levels on Board Ships and Noise and Vibration Guidelines." Journal of The Japan Institute of Marine Engineering 51, no. 4 (2016): 477–78. http://dx.doi.org/10.5988/jime.51.477.
Повний текст джерелаMansi, Francesca, Enza Sabrina Silvana Cannone, Antonio Caputi, Luigi De Maria, Leonardo Lella, Domenica Cavone, and Luigi Vimercati. "Occupational Exposure on Board Fishing Vessels: Risk Assessments of Biomechanical Overload, Noise and Vibrations among Worker on Fishing Vessels in Southern Italy." Environments 6, no. 12 (December 17, 2019): 127. http://dx.doi.org/10.3390/environments6120127.
Повний текст джерелаL., PANA. "Measurement and analysis of vibrations of electric motors on board container ships." Scientific Bulletin of Naval Academy XXIV, no. 1 (July 15, 2021): 145–56. http://dx.doi.org/10.21279/1454-864x-21-i1-018.
Повний текст джерелаBosoancă, R., and I. Bosoancă. "Practical evaluation of the vibrations of a rail mounted boom crane." IOP Conference Series: Materials Science and Engineering 1262, no. 1 (October 1, 2022): 012033. http://dx.doi.org/10.1088/1757-899x/1262/1/012033.
Повний текст джерелаWen, Xiao Fei, Xing Di Wang, and Qiang Yuan. "A Study on Test Technology of Ship Shafting Torsional Vibration." Advanced Materials Research 199-200 (February 2011): 1423–28. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.1423.
Повний текст джерелаCharchalis, Adam. "Measurement and Diagnostic System for Marine Engines." Journal of KONBiN 49, no. 3 (October 1, 2019): 33–48. http://dx.doi.org/10.2478/jok-2019-0049.
Повний текст джерелаXue, Shufei, Shuochen Wu, Qing Tang, Shulin Liu, and Bai Liu. "Research on torsional vibration monitoring system of ship power shafting." IOP Conference Series: Materials Science and Engineering 1207, no. 1 (November 1, 2021): 012007. http://dx.doi.org/10.1088/1757-899x/1207/1/012007.
Повний текст джерелаWu, Tong-Ming. "Engineering Analysis on Vibration Characteristics of Merchant Vessels with Theoretical and Onboard Test Approaches." Marine Technology and SNAME News 38, no. 04 (October 1, 2001): 241–49. http://dx.doi.org/10.5957/mt1.2001.38.4.241.
Повний текст джерелаFrank, DeBord, Hennessy William, and McDonald Joseph. "Measurement and Analysis of Shipboard Vibrations." Marine Technology and SNAME News 35, no. 01 (January 1, 1998): 1–9. http://dx.doi.org/10.5957/mt1.1998.35.1.1.
Повний текст джерелаДисертації з теми "Vibration measurement on board ship"
Moro, Lorenzo. "Structure borne noise due to marine diesel engines: experimental study and numerical simulation for the prediction of the dynamic behaviour of resilient mounts." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11114.
Повний текст джерелаGli alti livelli di comfort che sono richiesti oggigiorno a bordo di navi da crociera e mega-yachts, portano i progettisti a concentrare la loro attenzione sul problema del rumore strutturale. I motori diesel quattro tempi che sono installati a bordo nave come motori principali o diesel generatori, sono tra le principali sorgenti di rumore strutturale. Per questa ragione, al fine di ridurre l’energia vibrazionale generata da queste sorgenti e trasmessa, tramite le strutture nave, ai locali alloggio, i motori diesel sono sospesi mediante elementi resilienti. Tali elementi resilienti disaccoppiano la sorgente di rumore e vibrazioni (motore diesel) dal mezzo di propagazione (le strutture nave) e isolano dunque la sorgente dalle strutture riceventi. I livelli di rumore strutturale misurati alle fondazioni del motore diesel dipendono dai livelli di velocità misurati sulla sorgente (cioè ai piedi del motore diesel), dai livelli di impedenza meccanica degli elementi resilienti e dai livelli di mobilità meccanica delle fondazioni del motore diesel. Il single-point approach è un approccio semplificato per la previsione dei livelli di rumore strutturale che trascura l’interazione tra elementi resilienti. Secondo tale teoria, al fine di ridurre il rumore strutturale trasmesso attraverso gli elementi resilienti alle strutture nave, si deve ridurre l’impedenza meccanica degli elementi resilienti così come la mobilità meccanica delle fondazioni del motore diesel. In altre parole, si devono aumentare la rigidezza dinamica degli elementi resilienti così come l’impedenza meccanica delle fondazioni del motore diesel. Ad oggi, l’impedenza meccanica degli elementi resilienti può essere ricavata solo mediante prove sperimentali in laboratorio, mentre la mobilità meccanica del motore diesel è solitamente misurata quando la nave è in costruzione. Dunque non vi è la possibilità di predire, in fase progettuale, il rumore strutturale dovuto ai motori diesel. In questa tesi, viene presentata una procedura per la simulazione del rumore strutturale dovuto a motori diesel marini. La procedura si basa su test sperimentali e simulazioni numeriche. Nella prima parte della tesi sono richiamate le basi teoriche necessarie per l’esecuzione delle procedure numeriche e delle prove sperimentali. Sono dunque presentati i risultati delle analisi numeriche per simulare la mobilità delle fondazioni dei motori diesel marini. I risultati delle analisi FEM sono stati validati mediante confronto dei risultati delle analisi numeriche con i dati ottenuti da una campagna di misure eseguite a bordo nave. Successivamente sono presentati i risultati di una serie di prove eseguite per collaudare una nuova macchina sperimentale per misurare l’impedenza meccanica degli elementi resilienti. Lo scopo del collaudo era definire una procedura per l’utilizzo della macchina e per l’esecuzione di prove sperimentali in accordo alla ISO 10846, che è considerata normativa di riferimento per questo tipo di prove. Si è dunque proceduto con l’esecuzione di prove sperimentali eseguite su un elemento resiliente per motori diesel marini. Le prove sono state eseguite a differenti carichi statici. I risultati di queste prove sperimentali sono stati utilizzati per settare un modello numerico che simuli il comportamento non-lineare del componente in gomma del resiliente. I risultati ottenuti sia dalle prove sperimentali sia dalle simulazioni numeriche sono stati utilizzati per predire il rumore strutturale generato dai motori diesel, in accordo al single-point approach. I risultati ottenuti dall’applicazione del metodo sono stati confrontati con misure eseguite a bordo e sono stati discussi per evidenziare vantaggi e svantaggi dell’applicazione del metodo. Le procedure numeriche per la simulazione del comportamento dinamico del resiliente e della fondazione costituiscono un primo passo per l’ottimizzazione del sistema di isolazione del motore diesel marino.
The high level of comfort that is required today on board cruise vessels and mega-yachts, leads the designers to focus their attention on structure-borne noise issues. Four-stroke diesel engines that are installed on board as main diesel engines for the propulsion system and as gen-sets, are usually the main sources of structure-borne noise. For this reason, the diesel engines are usually resiliently mounted in order to reduce the vibration energy generated by these sources and transmitted through the ship structures to the accommodation areas. These mounts decouple the noise and vibration source (diesel engine) from the means of wave propagation (ship structures) and so, they isolate the source from the receiving structures. The structure-borne noise levels measured at the diesel engine foundation depend on the velocity levels measured at the source (diesel engine feet), on the mechanical impedance levels of the resilient mounts and on the mechanical mobility levels of the diesel engine foundation. The simplified theory of the single-point approach neglects the interaction among the resilient mounts. According to this theory, to decrease the structure-borne noise transmitted through the resilient mounts towards the ship structures, the mechanical impedance of the resilient mounts as well as the mechanical mobility of the diesel engine foundation are to be lowered. In other words the dynamic stiffness of the resilient mounts has to be decreased and the mechanical impedance of the diesel engine foundation has to be increased. To date, the mechanical impedance of real resilient mounts can only be obtained by laboratory tests and the mechanical mobility of the diesel engine foundation is usually measured when the ship is under construction, so it is not available for predictive analyses. In the thesis, a procedure for simulating the structure-borne noise generated by marine diesel engine is discussed. The procedure is based on both experimental tests and numerical simulations. In the first part of the thesis, some notes on the theoretical background are presented. Then, the results of FE analyses for simulating the mechanical mobility of a diesel engine foundation are shown. The FE models have been validated by the results of a measurement campaign carried out on board a ship. Then, the results of a series of tests performed to tune a new test rig, designed and built up at the University of Trieste for measuring the mechanical impedance of resilient mounts, are discussed. The campaign for tuning the test rig has been carried out in order to set an experimental procedure that allows achieving results in compliance with the ISO 10846 Standard, which is a sound reference for this kind of tests. As a case study, a large resilient mount for marine diesel engines has been tested to achieve its mechanical impedance curve at different static pre-loads. The outcomes of the experimental tests have been used for tuning the best numerical model of the resilient mount that properly takes into account the nonlinear behaviour of the rubber core. The data of the experimental tests carried out on board ships as well as in laboratory and the outcomes of numerical simulations have been used to predict the structure-borne noise according to the single-point approach. The outcomes achieved by the application of the method have been compared with on board measurements and pros and cons of the method are widely discussed. Moreover, the numerical procedures for the simulation of the dynamic behaviour of the resilient mount and the diesel engine foundation, pave the way for the optimization of the decoupling system of marine diesel engines.
XXVII Ciclo
1982
Arn, Krissa Elizabeth 1980. "Design of a non-contact vibration measurement and analysis system for electronic board testing." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/18070.
Повний текст джерелаIncludes bibliographical references (p. 107).
Traditional vibration measurement methods involve placing accelerometers at discrete locations on a test object. In cases where the test specimen is small in mass, the addition of these measurement transducers can alter its dynamic behavior and lead to erroneous test data. In this thesis a Non-Contact Vibration Measurement and Analysis System has been designed, built, and tested for electronic board testing. Through a product design process, all feasible methods were considered and three optically based concepts were explored: holographic interferometry, area scaling, and displacement sensor grid. Through concept testing and analysis, the displacement sensor grid method was chosen for the design. The final system incorporates four laser displacement sensors with a vertical scrolling mechanism that attaches to the vibration table's side rails. This manual scanning system provides a quick, low cost method for capturing multiple points on the test object during vibration testing. The MATLAB based software package acquires the raw sensor output and processes it with a five step analysis program. With this software, an 8x4 grid of electronic board displacements were easily transformed into a movie showing the board displacing through its first mode. The system requires the sensors be positioned lcm away from the test object with the sensors reading up to [plus-minus]lmm of movement. The sensors have a maximum sample rate of 7.8 kHz and can be used to measure the displacements of any surface type or material. The measurement grid resolution is 0.7 inches horizontally 0.4 inches vertically. Testing showed that the system captured the natural frequency and peak displacement of the board's first mode within 1.5% accuracy and 0.7% accuracy respectively
(cont.) when compared with previous accelerometer grid testing. Exceeding its design goals, this non-contact measurement and analysis device provides a highly versatile, accurate, and low cost optical alternative to accelerometers. Also it shows numerous benefits over more complex and costly optical measurement methods. The use of this system eliminates any question of whether mass loading effects are tainting vibration test data. A hardware and software manual are included for reference at the end of this thesis along with a software CD.
by Krissa Elizabeth Arn.
S.M.
Schneider, Nathan A. "Prediction of surface ship response to severe underwater explosions using a virtual underwater shock environment." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FSchneider.pdf.
Повний текст джерелаThesis advisor(s): Young S. Shin. Includes bibliographical references (p. 161-162). Also available online.
Haugen, Petter. "Automotive Energy Harvesting." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-37606.
Повний текст джерелаPetrusa, Douglas C. "Evaluation and analysis of DDG-81 simulated athwartship shock response." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FPetrusa.pdf.
Повний текст джерелаChen, Rui-Bin, and 陳瑞彬. "Ship Vibration Assessment Using Measurement Database." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/47773579640778303258.
Повний текст джерела國立高雄海洋科技大學
造船及海洋工程研究所
104
Ship vibration has great impact on ship equipment, structure safety, and passenger comfort. Over the years, shipbuilding corporations has accumulated significant amounts of ship vibration measurement data, by conducting vibration analysis at design time and measuring vibration reaction at sea for newly built ship. There are two ways to assess vibration of a ship hull in the design stage. One is using the empirical formula. The other is using finite element analysis method. In this research, not only used empirical formula to assess the natural frequency but also used the MSC/Patran (pre/post processors) and MSC/Nastran (solver) to analyze natural frequency and mode shapes. In order to ensure accuracy of the natural frequency assessed with empirical formula and finite element analysis method. This research used the onboard measurement of vibration reaction to modify the analysis, let the assessment closer to the measurement. Offer the newly ship design and assess the ship vibration.
Huong, Nguyen Van, and 阮文享. "Development of Measurement System for Ship Vibration." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/31025946114395326981.
Повний текст джерела國立高雄海洋科技大學
造船及海洋工程研究所
101
Abstract The purpose of this research is to develop a complete measurement and analysis system for the hull vibration. For local vibration of ship, the measurement requests to conform with ISO 6954:1984 or ISO 6954:2000 specifications, to address this issue this study has been successfully estab- lished a feature of analysis. Thus can be processing and analyzing real time data. In addition, order analysis method is used for establishing the relationship between the vibration amplitude and the rotation speed of main engine and propeller. This investigation had integrated the LabVIEW graphical language and modular hardware to develop an effective measurement and analysis system. The hardware adopted data acquisition NI - 9234. The Compact DAQ-9188 has been used for simultaneous measure multi-position. Through connected and internal designed, the system could be processing and integrating data immediately. Field tests were conducted in measurement to verify the performance of the system, including effect of cable to signal quality, rotation speed confirming, applying finite element method to conform modal testing. Otherwise, the result revealed on the shipboard vibration is proven this system could be stability operating, then the system fulfills the practical application demands also widely applies in different areas of vibration measurement. Key words: Hull vibration, Measurement system, Data acquisition,Order analysis, Modal analysis
Huang, Bo-Jhih, and 黃柏智. "Development of Measurement Database System for Ship Vibration." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/53795832012505449302.
Повний текст джерела國立高雄海洋科技大學
造船及海洋工程研究所
104
This research focuses on the design and implementation of a ship vibration measurement, and development of an intuitive front-end windows application for data maintenance. Over the years, Shipyard has collected a few dozens of ship vibration measurement data during the sea trials. However, the storage medium for these measurement was through analog tapes, which is not only hard to utilize in current digital computing world and is becoming harder to extract data using the available reader. In order to preserve the valuable ship vibration measurement results, these analog measurement data was first digitized, and later cataloged into our proposed database management system through the designed software. The propose database and software solution is intuitive and convenient. An end user can easily add new measurement data and manage ship information through the developed software. In addition, through one simple click on the software screen, a user is allowed to perform the entire collection of analysis, and generate plots and graphs on the stored data. With ever increasing data managed by the database, we will be able to utilize the statistical analysis result to help evaluate the vibration of a new ship design, as well as advising improved ship structure vibration evaluation protocol through cross referencing the real measurement data with respect to the mathematical ship body vibration analysis method. Keywords: ship vibration, onboard measurement, vibration analysis, order analysis, database
Chen, Yan-Cheng, and 陳彥棖. "Measurement and Analysis of Vibration and Noise of Container Ship Cabin." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/e7pbbu.
Повний текст джерела國立臺灣海洋大學
系統工程暨造船學系
106
In this research, the level of noise and vibration of the engine room, steering gear room and Tally office of a 2800TEU container ship were investigated by on-site measurements which include the utilization of accelerometers, microphones and acoustic cameras. Additionally, the estimation procedure of cabin noise is established, and the results of the measurement and analysis show the same trend. First, taking the acoustic camera is used to find the locations having maximum noise, and then the accelerometers and microphones measures the signal during the different conditions. In the signal processing, the author plots the spectrogram and one third octave band by using short-time Fourier transform and time-averaging approach in order to reduce the noise effect. There are two following results found by this research: One, during stable navigation the vertical vibration frequency is same as the noise frequency, and the frequency of propeller and the largest engine excitation force and its harmonic frequency often appear in the spectrogram’s peaks in cabin noise. Another, the spectral distribution of cabin noise is mainly below 250 Hz, and the maximum sound pressure level usually happens at the center of the plate. Apart from on-site measurements, simulations of simple conditions are carried out numerically find the vertical vibration frequency of the plate is found to compare favorably with the peak frequency obtained by noise; however, there is a significant amount of deviation when comparing the amplitudes. Because of the values of noise contribution caused by the different vibration modes are different. For the whole container ship, numerically, the noise level under different excitation forces is carried out by simulating the acoustic field in the cabins; the excitation forces are available from the finite element results provided by the shipyard. The result of the analysis shows that rooms on the higher floor having the higher noise level, and also the rooms near the center of the superstructure.
Книги з теми "Vibration measurement on board ship"
P, Lin Paul, and NASA Glenn Research Center, eds. Monitoring the microgravity environment quality on-board the International Space Station using soft computing techniques. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2001.
Знайти повний текст джерелаP, Lin Paul, and NASA Glenn Research Center, eds. Monitoring the microgravity environment quality on-board the International Space Station using soft computing techniques. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2001.
Знайти повний текст джерелаMonitoring the microgravity environment quality on-board the international space station using soft computing techniques. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2002.
Знайти повний текст джерелаЧастини книг з теми "Vibration measurement on board ship"
Bassetti, Mirko, Riccardo Tonna, Tatiana Pais, Paolo Silvestri, Enrico Lembo, and Andrea Iuliano. "Application of Transfer Path Analysis Technique to Cruise Ships." In Progress in Marine Science and Technology. IOS Press, 2022. http://dx.doi.org/10.3233/pmst220047.
Повний текст джерелаBassetti, Mirko, Maurizio Morelli, Attilio Binotti, Enrico Lembo, and Andrea Iuliano. "Airborne Sound Propagation Induced by a Cruise Ship Through Simulation and Correlation with Real Measurements." In Progress in Marine Science and Technology. IOS Press, 2022. http://dx.doi.org/10.3233/pmst220046.
Повний текст джерелаТези доповідей конференцій з теми "Vibration measurement on board ship"
Cergol, Valter, Alessandro Toson, and Romualdo Di Giovanni. "Correlation Between the Calculated and On-board Measured Vibration and Noise Levels for a Passenger Ship." In SNAME 30th American Towing Tank Conference. SNAME, 2017. http://dx.doi.org/10.5957/attc-2017-0005.
Повний текст джерелаMagionesi, Francesca, and Elena Ciappi. "Characterization of the Response of a Curved Elastic Shell to Turbulent Boundary Layer." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30738.
Повний текст джерелаCharchalis, A. "Diagnosing ship propulsion by vibration measurement for navigation safety." In RISK ANALYSIS 2008. Southampton, UK: WIT Press, 2008. http://dx.doi.org/10.2495/risk080531.
Повний текст джерелаHong Men, Jianguo Wang, Jing Gao, and Ping Wang. "On Board-ship Seawater Heavy Metal Automatic Measurement System Based on Electronic Tongue." In 2006 6th World Congress on Intelligent Control and Automation. IEEE, 2006. http://dx.doi.org/10.1109/wcica.2006.1713352.
Повний текст джерелаGuo, Minmin, Yongming Nie, and Longzhi Xie. "Measurement of slight angle of ship board dynamic platform based on bi-Fresnel prisms." In 2015 International Conference on Intelligent Systems Research and Mechatronics Engineering. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/isrme-15.2015.60.
Повний текст джерелаKubota, Hiromichi, Masanari Taniguchi, Shosuke Suzuki, and Tasuku Takagi. "3-D Graphic Image of Vibration Pattern of Printed Circuit Board by Using Holography." In 2007 IEEE Instrumentation and Measurement Technology Conference. IEEE, 2007. http://dx.doi.org/10.1109/imtc.2007.379279.
Повний текст джерелаCheng, Zhongyi, Junning Cui, Yamin Zhao, and Mingrui Jin. "Time Domain Response Analysis of Ship Power Equipment Vibration Isolation System under Shock." In 2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI). IEEE, 2021. http://dx.doi.org/10.1109/icemi52946.2021.9679561.
Повний текст джерелаKim, Sang-Yeob, Min-Su Kim, Ki-Min Han, Joon-gyu Kim, and Dae-Won Seo. "Study on Data Analysis of On-Board Measurement Data for Ship’s Speed Power Performance." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-19153.
Повний текст джерелаDonavan, Paul R. "Use of the ASTM Standard Reference Test Tire as a Benchmark for On-Board Tire/Pavement Noise Measurement." In SAE 2009 Noise and Vibration Conference and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2009. http://dx.doi.org/10.4271/2009-01-2108.
Повний текст джерелаSuyuthi, Abdillah, Bernt J. Leira, and Kaj Riska. "Full Scale Measurement on Level Ice Resistance of Icebreaker." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-50066.
Повний текст джерелаЗвіти організацій з теми "Vibration measurement on board ship"
Plueddemann, Albert, Benjamin Pietro, and Emerson Hasbrouck. The Northwest Tropical Atlantic Station (NTAS): NTAS-19 Mooring Turnaround Cruise Report Cruise On Board RV Ronald H. Brown October 14 - November 1, 2020. Woods Hole Oceanographic Institution, January 2021. http://dx.doi.org/10.1575/1912/27012.
Повний текст джерелаBigorre, Sebastien P., and Raymond Graham. The Northwest Tropical Atlantic Station (NTAS): NTAS-20 Mooring Turnaround Cruise Report Cruise On Board RV Pisces November 4-28, 2021 Newport, RI - Pascagoula, MS. Woods Hole Oceanographic Institution, February 2023. http://dx.doi.org/10.1575/1912/29647.
Повний текст джерела