Download or read book Seakeeping Characteristics of the XR 5 A High Length Beam Ratio Manned Surface Effect Testcraft III Results of Random Wave Experiments Investigation of Linear Superposition for Ship Motions and Trim and Draft in Random Waves written by Joseph J. Ricci and published by . This book was released on 1976 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Motion responses derived from model experimental results in regular and irregular head waves for the XR-5 high length-beam ratio surface effect ship are presented. Frequency response functions for pitch, heave, relative bow motion, heave acceleration and bow acceleration were computed from the random wave experiments and are presented herein. Comparisons are made with responses derived from regular wave experiments. The results indicate that the rigid body motions are reasonably linear for the Froude numbers and sea conditions investigated. Nonlinear effects that increase with the severity of the sea state are evident in the accelerations. In addition, the motion of the stern seal with respect to the relative motion at the stern is presented. These responses are generally linear although some nonlinear effects appear with increasing Froude number. Probability distributions for the double amplitude of wave height, heave and pitch are presented. Comparisons are made with Rayleigh probability distributions based on the variances of the sample data and on the minimum Chi Square estimators computed from the distributions. (Author).
Download or read book Journal of Hydronautics written by and published by . This book was released on 1977 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: A publication of the American Institute of Aeronautics and Astronautics devoted to marine science and technology.
Download or read book Seakeeping Characteristics of the XR 5 a High Length Beam Ratio Manned Surface Effect Testcraft II Results of Linearity Investigation Effects of Changes from Reference Operating Condition and Trim and Draft in Regular Waves written by Allen H. Magnuson and published by . This book was released on 1975 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Motion responses in regular head waves for the XR-5 high length-beam ratio surface effect ship are presented. Frequency response functions based on an equivalent amplitude derived from the total energy are presented for pitch, heave, relative bow motion, heave acceleration and bow acceleration. These are compared with responses computed from the first harmonic component of each signal. The results show that the pitch, heave, relative bow motion and bow acceleration exhibit linear behavior for the Froude numbers investigated. Some nonlinear behavior is evident in the heave acceleration at frequencies near the natural frequency in pitch. The effect of varying lift fans and duct valve settings on the response is determined. The pitch magnification is shown to increase when the duct valves are opened beyond the reference settings. Trim angles and drafts for the reference operating condition are presented as a function of encounter frequency for three speeds. The results indicate a moderate variation in trim and draft with frequency.
Download or read book MRIS Abstracts written by Maritime Research Information Service and published by . This book was released on 1977 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Collection of Technical Papers written by and published by . This book was released on 1976 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Abstracts of the British Ship Research Association written by British Ship Research Association and published by . This book was released on 1978 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consists largely of abstracts of articles and papers of interest to shipbuilders, ship owners and marine engineers.
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seakeeping Characteristics of the Xr 5 a High Length beam Ratio Manned Surface Effect Testcraft written by Allen H. Magnuson and published by . This book was released on 1975 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Motion response data for regular waves in head seas is presented for a model of a high length/beam ratio surface effect ship (SES). Data is presented in normalized form for pitch, heave, relative bow velocity, relative bow motion, stern seal motion, bow acceleration and heave acceleration. The pitch motion data exhibits a resonant or underdamped behavior governed by a constant natural frequency throughout the speed range investigated. The wave pumping effect was observed in the supercritical frequency range, and was particularly evident in the normalized acceleration data. The relative bow motion exhibits a pronounced peak at a frequency slightly above the pitching natural frequency.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1977-05 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wave Excitation and Vertical Plane Oscillation Experiments on a High Length to Beam Ratio Surface Effect Ship written by James A. Fein and published by . This book was released on 1976 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Captive model experiments were conducted on a high length-to-beam ratio surface effect ship testcraft design to determine vertical plane characteristics and to evaluate captive model experimental techniques. Model results for forced heave oscillation and pitch oscillations, and regular-wave exciting forces and moments and transient-waves exciting forces and moments are reported. The effects of sidewalls and cushion pressure variation on the oscillation results are identified. The correlation between the regular waves and transient waves techniques for determining the excitation is shown. (Author).
Download or read book High performance Ships written by Stanley W. Doroff and published by . This book was released on 1960 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Naval Engineers Journal written by and published by . This book was released on 1922 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report Naval Ship Research and Development Center written by David W. Taylor Naval Ship Research and Development Center and published by . This book was released on 1945 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spray Drag of Surface piercing Struts written by Richard B. Chapman and published by . This book was released on 1971 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Speed and Power of Ships written by David Watson Taylor and published by Legare Street Press. This book was released on 2022-10-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Resistance of Ships and Screw Propulsion written by David Watson Taylor and published by . This book was released on 1893 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
