Download or read book Dynamic Liquid Slosh in Moving Containers written by Amir Kolaei and published by . This book was released on 2015 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid sloshing is known to strongly influence the directional dynamics and safety performance of highway tank vehicles in a highly adverse manner. Hydrodynamic forces and moments arising from liquid cargo oscillations in the tank under steering and/or braking maneuvers reduce the stability limit and controllability of the partially filled tank vehicles. While the transient fluid slosh within moving containers has been widely investigated, interactions between the sloshing cargo and the vehicle system dynamics have been addressed in only a few studies due to associated challenges. Furthermore, roll stability of heavy tank vehicles have been extensively studied in the absence of transient slosh-induced forces and moments. This dissertation research aims at exploring the fluid slosh in moving containers through analytical methods and developing efficient models for simulating interactions of fluid slosh and vehicle dynamics. A comprehensive review of relevant studies reporting tank trucks accident data, tank design standards, and analysis methods of liquid sloshing in moving containers is initially performed and briefly summarized. The literature review provides not only the essential knowledge for developing an efficient method of analysis, but also demonstrates the needs for addressing limitations in the current standards so as to include effects of liquid sloshing dynamics in road tankers. An analytical model of two-dimensional fluid slosh in horizontal cylindrical tanks subject to a lateral excitation is initially formulated assuming potential flows and linearized free-surface boundary. For this purpose, the fluid domain in the Cartesian coordinates is transformed to the bipolar coordinates, where the Laplace equation could be solved using separation of variables. The resulting hydrodynamic pressure, free-surface elevation, and slosh force and roll moment are compared with the reported experimental and numerical results to illustrate the range of applicability and limitations of the linear slosh theory. The results suggest that the linear theory can yield reasonably accurate predictions of non-resonant lateral slosh in liquid transporting vehicles with significantly less computational effort than the CFD models. A multimodal model of fluid slosh is subsequently developed to study the effect of tank cross-section on transient lateral slosh. Natural frequencies and modes of liquid slosh in tanks of different cross-sections are obtained using a variational Ritz method, which are implemented into the multimodal model. The effect of transient liquid slosh and tank cross-section on rollover stability limits of a tank vehicle is also investigated by integrating the fluid slosh model into a roll plane model of the suspended tank vehicle. The results are presented for four different tank cross-sections: circular; elliptical; modified-oval; and Reuleaux-triangle. The results show that a tank cross-section with lower overall center of mass and lower critical slosh length could yield enhanced roll stability limit under medium- and high-fill conditions. The multimodal method is also employed to investigate the effect of partial longitudinal baffles on the transient lateral slosh. Natural slosh frequencies and modes are computed using a boundary integral solution of the Laplace equation. The computational efficiency is significantly improved by reducing the generalized eigenvalue problem to a standard one involving only the velocity potentials of the elements on the half free-surface length. Damping due to the baffles is estimated from the energy dissipation rate. The results are presented for different designs/lengths of longitudinal baffles, namely, top-mounted; bottom-mounted; and center-mounted baffles. It is shown that the multimodal method yields computationally efficient solutions of liquid slosh within moving baffled containers. The results suggest that a baffle is most effective and efficient when it pierces the free-surface and partly submerged in the liquid. A three-dimensional linear slosh model is further developed to study fluid motions under simultaneously applied lateral and longitudinal excitations, characterizing braking-in-a-turn maneuver, using the multimodal method. Three-dimensional Laplace equation is initially reduced to a two-dimensional Helmholtz equation using separation of variables. A higher order boundary integral solution of the Helmholtz equation is then formulated to compute natural slosh frequencies and modes in a horizontal cylindrical tank of arbitrary cross-section. The results obtained for a circular tank suggested rapid convergence of the natural slosh frequencies and hydrodynamic coefficients. The slosh forces and moments are also computed from the nonlinear analysis of liquid slosh in a tank under various lateral/longitudinal accelerations and fill ratios using the FLUENT software. Comparisons of the results obtained from the linear and nonlinear analyses revealed that the linear slosh theory yields reasonably accurate predictions of the peak slosh forces and moments under lateral/longitudinal accelerations of steady magnitudes of up to 0.3g/0.2g for a tank of aspect ratio of 2.4.
Download or read book The Dynamic Behavior of Liquids in Moving Containers written by Southwest Research Institute and published by . This book was released on 1966 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Sloshing Dynamics written by Raouf A. Ibrahim and published by . This book was released on 2005-09 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with almost every aspect of liquid sloshing dynamics.
Download or read book The Dynamic Behavior of Liquids in Moving Containers with Applications to Space Vehicle Technology written by H. Norman Abramson and published by . This book was released on 1966 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Sloshing Dynamics written by Raouf A. Ibrahim and published by Cambridge University Press. This book was released on 2005-05-19 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of liquid sloshing in moving or stationary containers remains of great concern to aerospace, civil, and nuclear engineers; physicists; designers of road tankers and ship tankers; and mathematicians. Beginning with the fundamentals of liquid sloshing theory, this book takes the reader systematically from basic theory to advanced analytical and experimental results in a self-contained and coherent format. The book is divided into four sections. Part I deals with the theory of linear liquid sloshing dynamics; Part II addresses the nonlinear theory of liquid sloshing dynamics, Faraday waves, and sloshing impacts; Part III presents the problem of linear and nonlinear interaction of liquid sloshing dynamics with elastic containers and supported structures; and Part IV considers the fluid dynamics in spinning containers and microgravity sloshing. This book will be invaluable to researchers and graduate students in mechanical and aeronautical engineering, designers of liquid containers, and applied mathematicians.
Download or read book Propellant Slosh Loads written by United States. National Aeronautics and Space Administration and published by . This book was released on 1968 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Sloshing Dynamics written by R. A. Ibrahim and published by . This book was released on 2005 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of liquid sloshing in moving or stationary containers remains of concern to aerospace, civil, and nuclear engineers, physicists, designers of road tankers and ship tankers, and mathematicians. This book takes the reader systematically from basic theory to advanced analytical and experimental results in a self-contained and coherent format.
Download or read book A Nonlinear Analysis of Liquid Sloshing in Moving Containers written by T. C. Su and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Dynamics and Vibration Control of Flexible Systems written by JIE HUANG and published by CRC Press. This book was released on 2022-10-04 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an essential guide to nonlinear dynamics and vibration control, detailing both the theory and the practical industrial applications within all aspects of engineering. Demonstrating how to improve efficiency through reducing unwanted vibration, it will aid both students and engineers in practically and safely improving flexible structures through control methods. Increasing demand for light-weight robotic systems and space applications has actuated the design and construction of more flexible structures. These flexible structures, involving numerous dynamic systems, experience unwanted vibrations, impacting accuracy, operating speed, safety and, importantly, efficiency. This book aids engineers in assuaging this issue through vibration control methods, including nonlinear dynamics. It covers topics such as dynamic modeling of nonlinear system, nonlinear oscillators, and modal analyses of multiple-mode system. It also looks at vibration control methods including linear control, nonlinear control, intelligent control, and command smoothers. These control methods are effective and reliable methods to counteract unwanted vibrations. The book is practically minded, using industrial applications throughout, such as bridge cranes, tower cranes, aerial cranes and liquid sloshing. It also discusses cable-suspension structures, light-weight links, and fluid motions which exhibit flexible-structure dynamics. The book will be of interest to students and engineers alike, in the field of mechatronics, mechanical systems and signal processing, nonlinear dynamics, vibration, and control engineering.
Download or read book The New dynamic Behavior of Liquids in Moving Containers written by Franklin T. Dodge and published by . This book was released on 2000 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Sloshing in Containers with Flexibility written by Marija Gradinscak and published by LAP Lambert Academic Publishing. This book was released on 2012-03 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sloshing is the low frequency oscillation of the free surface of a liquid in a partially filled container. If not controlled effectively, sloshing may cause excessive dynamic loads which may lead to structural failure (in case of storage containers) or loss of dynamic stability (in case of transport vehicles). Hence, study and control of liquid sloshing is a well justified topic in engineering and science. Container flexibility causes moving boundaries which further complicate the treatment of this already challenging problem. On the other hand, container flexibility may be treated as a design parameter to gain benefit in controlling the free surface oscillations. Although numerous studies have been reported in the literature, attempts to control sloshing have been relatively limited. This book details numerical predictions using standard finite elements software (ANSYS) for the simulation of liquid sloshing in a flexible container.
Download or read book Vibration Reduction for Flexible Structures by Smoothing Commands written by Jie Huang and published by Lulu.com. This book was released on 2020-01-04 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book described vibration reduction for flexible structures by the command smoothing techniques. The Command smoothing technique is a kind of open-loop controller. The operator's commands filter through a piecewise continuous function, called smoother, to produce smoothed commands. Smoothed commands move flexible dynamic systems toward desired positions with minimal oscillations. Five types of command smoother were reported including one-piece, two-pieces, three-pieces, and four-pieces smoothers, and the smoother for multi-mode Duffing oscillators. All smoothers are robust to changes in the system parameters and working conditions. The command smoothing technique has been successfully applied to industrial cranes, sloshing suppression, flexible manipulators, high-speed cam and follower systems, and helicopter slung loads.
Download or read book Dynamics of Liquid Sloshing in Horizontal Cylindrical Road Containers written by G. Popov and published by . This book was released on 1993 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Liquid Sloshing in Road Containers written by Gennadiĭ Viktorovich Popov and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by and published by . This book was released on 1987 with total page 966 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Propulsion Re Entry Physics written by Michał Lunc and published by Elsevier. This book was released on 2014-05-09 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt: Propulsion Re-Entry Physics deals with the physics of propulsion re-entry and covers topics ranging from inductive magnetoplasmadynamic (MPD) propulsion systems to launch systems and orbiting maneuvering systems. Problems of re-entry aerodynamics are considered, along with interaction problems in hypersonic fluid dynamics. Comprised of 31 chapters, this volume begins with a detailed account of the quasi-steady adiabatic vaporization and subsequent exothermic decomposition of a pure monopropellant spherical droplet in the absence of free and forced convection. The discussion then turns to results of calculations on MPD machines working in the intermittent and in the continuous mode; inductive plasma accelerators with electromagnetic standing waves; and spherical rocket motors for space and upper stage propulsion. Subsequent chapters focus on pulsed plasma satellite control systems; drag and stability of various Mars entry configurations; hypersonic laminar boundary layers around slender bodies; and effects of an entry probe gas envelope on experiments concerning planetary atmospheres. This book will appeal to students, practitioners, and research workers interested in propulsion re-entry and the accompanying physics.
Download or read book Dynamics of Liquid Sloshing in Road Containers written by Gennady Popov and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
