Download or read book A Proposed Method for the Stress Analysis of Propeller Blades written by and published by . This book was released on 1956 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proposal for Propeller ice Interaction Finite Element Stress Analysis written by Martec Limited and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The objective of this project is to contribute to the effective design and regulation of propellers in Arctic service. The work will involve the use of special purpose propeller analysis programs developed by Martec Limited over the past seven years to determine the stress distribution and stress levels in propeller blades and the formulation of methods for predicting propeller/ice interaction forces. In this project a typical modern icebreaker propeller will be modelled with a nominal loading of uniformly distributed pressure over a depth of the blade immersed in a block of ice, and the stress distribution pattern and critical points where failure is likely to originate will be determined. Similar finite elements modelling will be carried out to assess sensitivity to a number of likely parametric variations, including: a) chord and thickness of the critical blade section (at constant t/c) and other features primarily affecting strength; b) primary performance dimensions (size, pitch, area ratios); c) secondary feature (skew, rake, hub dia, blade profile and section shape, pitch distribution). Stresses in the ice block due to penetration of the propeller blade will also be assessed by finite element modelling, and likely fracture patterns determined, considering the material properties of ice in both isotropic and non-isotropic forms and under a range of likely conditions of temperature and salinity. Likely configurations of blade/ice interaction load distribution and intensity will be assessed, and compared with conventional assumptions. ... (Au)"--ASTIS [online] database.
Download or read book Static Stresses on Wide bladed Propellers written by Justin H. McCarthy and published by . This book was released on 1970 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Static stresses were obtained in laboratory experiments for a destroyer propeller, having aerofoil blade sections, and a super-cavitating propeller, having wedge-shaped blade sections, using specially constructed pressure chambers that allowed the blade faces to be loaded under air pressure. A new method for applying beam theory is presented that closely predicts the magnitude and distribution of radial stresses on the destroyer propeller blade. For the supercavitating propeller, neither the proposed beam-theory method nor a particular computerized-shell analysis can be considered entirely satisfactory for prediction of blade stresses. (Author).
Download or read book Propeller Blade Vibration and Stress Analysis written by Edward Lieberman and published by . This book was released on 1963 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Method for Stress Analysis of a Swept Propeller written by Richard T. Whitcomb and published by . This book was released on 1948 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ship Resistance and Propulsion written by Anthony F. Molland and published by Cambridge University Press. This book was released on 2011-08-08 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts in the ship design field, this book provides a comprehensive approach to evaluating ship resistance and propulsion.
Download or read book Marine Propellers and Propulsion written by John Carlton and published by Butterworth-Heinemann. This book was released on 2018-11-30 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine Propellers and Propulsion, Fourth Edition, offers comprehensive, cutting edge coverage to equip marine engineers, naval architects or anyone involved in propulsion and hydrodynamics with essential job knowledge. Propulsion technology is a complex, multidisciplinary topic with design, construction, operational and research implications. Drawing on experience from a long and varied career in consulting, research, design and technical investigation, John Carlton examines hydrodynamic theory, materials and mechanical considerations, and design, operation and performance. Connecting essential theory to practical problems in design, analysis and operational efficiency, the book is an invaluable resource, packed with hard-won insights, detailed specifications and data. - Features comprehensive coverage of marine propellers, fully updated and revised, with new chapters on propulsion in ice and high speed propellers - Includes enhanced content on full-scale trials, propeller materials, propeller blade vibration, operational problems and much more - Synthesizes otherwise disparate material on the theory and practice of propulsion technology from the past 40 years' development, including the latest developments in improving efficiency - Written by a leading expert on propeller technology, essential for students, marine engineers and naval architects involved in propulsion and hydrodynamics
Download or read book Stress Analysis of Rotating Propellers Subject to Forced Excitations written by and published by . This book was released on 2015 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbine blades experience vibrations due to the flow disturbances. These vibrations are the leading cause for fatigue failure in turbine blades. This thesis presents the finite element analysis methods to estimate the maximum vibrational stresses of rotating structures under forced excitation. The presentation included starts with the derived equations of motion for vibration of rotating beams using energy methods under the Euler Bernoulli beam assumptions. The nonlinear large displacement formulation captures the centrifugal stiffening and gyroscopic effects. The weak form of the equations and their finite element discretization are shown. The methods implemented were used for normal modes analyses and forced vibration analyses of rotating beam structures. The prediction of peak stresses under simultaneous multi-mode excitation show that the maximum vibrational stresses estimated using the linear superposition of the stresses can greatly overestimate the stresses if the phase information due to damping (physical and gyroscopic effects) are neglected. The last section of this thesis also presents the results of a practical study that involves finite element analysis and redesign of a composite propeller.
Download or read book Marine Propellers and Propulsion written by John Carlton and published by Butterworth-Heinemann. This book was released on 2012-10-30 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: The early development of the screw propeller. Propeller geometry. The propeller environment. The ship wake field, propeller performance characteristics.
Download or read book Propeller Vibration and Stress Analysis by Finite Element Methods PVAST Version 4 written by and published by . This book was released on 1992 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: PVAST is a computer program for the strength & vibration analysis of marine propellers. It is based on the finite element method of structural analysis and is designed to automatically generate finite element models from a large library of elements for a wide variety of propeller geometries. The program can graphically display the model & the propeller geometry and can carry out static, natural frequency, & dynamic response analyses as well as display the analysis results in graphic form. This user manual includes descriptions of the finite element method, equations, & solving schemes used in PVAST analyses; the finite elements offered for propeller modelling and the modelling options available in the program; program organization & operation; features & usage of the program for pre- & post-processing; and how to use PVAST effectively & efficiently. Appendices include additional information on input data, load generation, plotting, generation of models for the fluid surrounding the blade, blade geometry generation, the geometry of marine propellers, and generation of air channel models.
Download or read book Deflection Stress and Vibration Analysis of Rotating Propellers Using Holography written by Jerome P. Sikora and published by . This book was released on 1974 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new holographic technique has been developed which allows measurement of the deflection of propeller blades while rotating. The technique requires that an axially-symmetric wavefront be directed onto both the propeller blade and a holographic plate rotating with the propeller. Some deflection results for a propeller rotating in air are presented and the technique has been shown to be feasible for propellers rotating in water.
Download or read book Elastic Strength of Propellers written by Paris Genalis and published by . This book was released on 1970 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The determination of displacements and stresses in a propeller blade under the influence of a hydrodynamic pressure load is investigated. Also a simplified approach to the free, undamped vibration of the blade is suggested. The finite element method of analysis is used to analyze the blade as a shell or as a combination of a three dimensional solid and a shell. For the vibration problem, the complete blade was idealized by shell elements only. Constant stress tetrahedra and rectangular prism elements were used for the analysis of the three dimensional solids. A combination of both kinds of elements was found to cause no algorithmic difficulties or inaccuracies in the results and to provide the flexibility to approximate irregular boundaries by the tetrahedron. The stiffness of the shell element was obtained by the superposition of the stiffness of the plane stress element and the fully compatible plate bending element. The results using only the shell element were good both for the static and the dynamic problems. It was felt that with comparable meshes the shell element was more powerful than either of the three dimensional elements. (Author).
Download or read book Report David W Taylor Model Basin written by David W. Taylor Model Basin and published by . This book was released on 1961 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book written by and published by . This book was released on 1995 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ANALYSIS OF PROPELLER BLADE DYNAMIC STRESSES VIBRATION ADDED MASS HYDROELASTICITY written by Jui-Fang Kuo and published by . This book was released on 1984 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: were calculated from this iterative process.
Download or read book Analysis and Design of Marine Structures V written by C. Guedes Soares and published by CRC Press. This book was released on 2015-03-11 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis and Design of Marine Structures V contains the papers presented at MARSTRUCT 2015, the 5th International Conference on Marine Structures (Southampton, UK, 25-27 March 2015). The MARSTRUCT series of conferences started in Glasgow, UK in 2007, the second event of the series took place in Lisbon, Portugal (2009), while the third was in Hambur
Download or read book 2023 International Conference on Marine Equipment Technology and Sustainable Development written by Desen Yang and published by Springer Nature. This book was released on 2023-08-01 with total page 1258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains original, peer-reviewed, and selected research papers that were presented at the 2023 International Conference on Marine Equipment & Technology and Sustainable Development, which took place in Beijing, China on April 1st 2023. The papers cover a range of topics, including but not limited to: the vision and goals of building a maritime community with a shared future, marine machinery and transportation, marine ecology, environmental protection and conservation, marine safety, future ships and marine equipment, marine engineering, marine information and technology, maritime policy, and global governance. The papers included in this volume provide the latest findings on methodologies, algorithms, and applications in marine equipment and technology, as well as sustainable development. As a result, this book is an invaluable resource for researchers, engineers, and university students who are interested in these fields.
