Rotor dynamic modeling of gears and geared systems. See all formats and editions hide other formats and editions. Apply to engineer, intern, product designer and more. Mod01 lec01 introduction to helicopter aerodynamics and. This addon to the structural mechanics module allows you to model components and parts in rotating machinery where asymmetries and the rotation can lead to instabilities and damaging resonances. Dynamics of rotors and foundations, erwin kramer, springerverlag berlin heidelberg 1993 vibration analysis of rotors, chongwon lee, center for noise and vibration control novic, korea, 1993, springer rotordynamics of automotive turbochargerslinear and nonlinear rotordynamics bearing design rotor. Dynamic properties of tiltingpad journal bearings in power plant iran yazd station erfan khosravian 1a. Rotating parts can be found in many mechanical products like in vehicles, airplanes, ships, machine tools. Our online video tutorials are going to explore and explain the different concepts that are.
Flight dynamics i airplane performance free aerospace engineering online course on nptel by iit madras e. Mod4 lec3 rotor unbalance and whirling of shaft, transmissibility. First, the mathematics behind the basic rotor dynamic principles are derived by introducing a simple rotor bearing system known as the foppljeffcott rotor. Later, when i was doing my master degree, i learnt the whole new aspect of dynamics, namely, 3d dynamics, dynamic model and analysis, derivation of equations of motion, lagranges mechanics, stability and rotordynamics. Application notes static and dynamic balancing of rigid. Pdf rotor dynamic modeling of gears and geared systems. Rotor dynamics third edition hardcover january 1, 1996. Mechanical engineering online courses with video lectures. Rotating dynamics cylindrical modes since rotating machinery has to rotate to do useful work, lets consider what happens to the first mode of our rotor once it is spinning. Majority of video courses on nptel do not offer lecture notes for download. It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk storage. Again, we will have three different versions with increasing bearing stiffness, and we will assume our support bearings have equal stiffness in all radial directions. Introduction to dynamics of rotorbearing systems wen jeng.
Bearing forces by integrating pressure profile on fluid area pressure profile by solving short reynolds equation. Learn for free, pay a small fee for exam and get a certificate. Direct integration of transient rotor dynamics albert f. For more details on nptel visit nptel related courses. Aerothermodynamics of flow through an axial flow compressor stage. The proposed course even though is introductory but effort will be made to expose. The mission of nptel is to enhance the quality of engineering education in the country by providing free online courseware. Profile of rajiv tiwari, author of rotor systems tiwari, dr.
Mod01 lec02 a brief history of rotor dynamics youtube. Systematic modeling of rotor dynamics for small unmanned. Brief history rise of wind powered electricity 1888. One neat thing about programs like adams and dads for that matter is that it it acausal in nature, unlike the blockbased environments simulink etc where you need to know how models interact when builind the model. This fundamental rotor dynamics short course is intended for engineering staff of companies using, repairing or manufacturing rotating machinery of common types. Test facilities the structural dynamics branch of nasa lewis. The geometric centerline being the physical centerline of the rotor. How can i download notes directly in pdf format from nptel. Mathematical modelling and dynamics analysis of flat multirotor configurations.
Flight dynamics i airplane performance aero e 412 by. Mechanical vibrations nptel online videos, courses iit. Rajiv tiwari, department of mechanical engineering, iit guwahati. Rotordynamics for setup of units o the user can define the units by selection from a couple of predefined groups that he would like to use in the analysis. Theory and practice of rotor dynamics online course video. These conductor bars are short circuited by an end rings at both endof the rotor core. It is the most valuable tool available for anyone working on modeling rotating machinery at the machine design stage or performing further analytical and experimental research on rotating machine dynamics. Calculate t net and a right edge of board at t0 assume board stays rigid v. Turbopump rotor dynamics because of high power density and low damping in rocket turbopumps, these machines exhibit in their most extreme form a variety of vibration effects, which are either absent or masked by normal damping mechanisms in other turbo machines.
The primary purpose of the software is to illustrate features of rotating machines described in the. Gearbox dynamics contain many complex interactions and many of the simplifying assumptions provided in the literature do. Rotor dynamics meaning rotor dynamics definition rotor dy. Turbomachinery aerodynamics free aerospace engineering online course on nptel by iit bombay bhaskar roy a m pradeep intro. Rotor dynamics is the branch of engineering that studies the lateral and torsional vibrations of rotating shafts. Rotordynamic analysis is a crucial step in the development of rotor bearing systems.
Instead it is a cylindrical core constructed of steel laminations with conductor bars mounted parallel to the shaft and embedded near the surface of the rotor core. It encompasses a wide variety of topics ranging from solar energy to micro fluids, fluid mechanics, rotor dynamics and more. Rajiv tiwari from iit guwahati made available by nptel elearning initiative. Ee263 autumn 200708 stephen boyd lecture 14 example. It evolved out of lectures delivered at different universities over the last two decades. Dynamics branch of nasa lewis research center tiasatm100800 test facilities of the n8821534 stbuctural dyuahics branch of nasa leuis research center nasa 26 p c3cl 2ik unclas 6339 0140057 gerald t. Ansys computes a displacement at bearings locations. Introduction this software is a set of scripts written in matlab to accompany the above book. Civil engineering video lectures nptel video lectures. When the two centerlines are coincident, then the rotor will be in a state of balance. Chen unmanned systems research group department of electrical and computer engineering, faculty of engineering national university of singapore, 21 lower kent ridge rd, singapore 119077 abstract this paper proposes a systematic modeling ap. The third revised and enlarged edition of the book presents an indepth study of the dynamic behaviour of rotating and reciprocating machinery. Unique and specific problems will be presented and its solution illustrated.
Pdf multirotor aircraft dynamics, simulation and control. Rotordynamics, also known as rotor dynamics, is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures. Venkatesan, department of aerospace engineering, iit kanpur. In this chapter we present a short introduction to rotor dynamics to familiarize the reader with the basic concepts and terminologies commonly used in describing rotor amb systems. Lewis electric company of new york sells generators to retrofit onto existing wind. Rotor dynamics is a traditional research area that lacks no unsolved difficult problems.
Rotordynamics is the preeminent guide to rotordynamic theory and practice. Fundamentals of rotorbearing dynamics and case histories in. Charles brush builds first largesize wind electricityyg generation turbine 17 m diameter wind rose configuration, 12 kw generator 1890s. Are you looking to improve your proficiency in the field of mechanical sciences. Tulapurkara definition and importance of flight dynamics. This can be used to give insight, interpret and explain the originated vibrational motions. Calculate torque and angular momentum plug in to t net dldt repeat, using masss lowest point as origin wooden board falls off table mass m, starting from rest using edge of table as origin. Unit 6 introduction to balancing balancing structure 6. Turbomachinery aerodynamics aero e 415 by nptel on iit bombay. A practical guide to rotor dynamics applied machinery. The course emphasizes handson exercises and reallife case studies rather than equations and higherlevel math. Nptel, online courses and certification, learn for free. Process description and product lifecycle stages solid model rotor dynamics is a method of performing the rotor dynamics analysis by solid elements instead of the conventional beam models.
This book is written as an introduction to rotor bearing dynamics for practicing engineers and students who are involved in rotordynamics and bearing design. Space flight mechanics aero e 309 by nptel on iit kharagpur. The purpose of this course is to give a basic understanding of the rotor dynamics phenomena with the help of simple rotor models and subsequently the modern analysis methods for real. Space flight mechanics free aerospace engineering online course on nptel by iit kharagpur manoranjan sinha the space flight mechanics is the first course in graduate and undergraduate courses.
In the first phase of the nptel project, iitg has developed 05 video courses and 15 web courses and in the second phase, iitg has developed 16 video courses and 64 web courses. Lewis research center group nasa lewis research center cleveland, ohio and robert e. Lees cambridge university press, 2010 rotordynamics software manual 1. Some courses might have presentations or quiz papers uploaded, but rest of them just have transcripts which is pretty useless to refer as notes. Dynamic modeling and control of a hexarotor using linear and. The rotating centerline being defined as the axis about which the rotor would rotate if not constrained by its bearings. Obased on this selection a wizard nonbinding for input parameters entry will. Rajiv tiwari has been deeply involved in research area of rotor dynamics i. Three controls schemes, namely proportionalderivativeintegral pid controller, backstepping and sliding mode smc, have been applied to control the altitude, attitude, heading and position of the hexacopter in space.
The goal of this book is to provide a stepbystep approach to the understanding of fundamentals of rotor bearing dynamics by using dyrobesc. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. This site is a gateway to technical literature on rotordynamics, including an online database of over 26,000 technical papers presented at conferences related to rotordynamics worldwide since 1974. Property relationships for pure substances and mixtures, thermodynamic relations, ideal gas mixtures, combustion thermodynamics, gas power cycles, vapour power cycles, refrigeration cycles, reciprocating compressors, compressible flows and steam nozzles. The advanced course on space flight mechanics gets specialized in the sub streams of space flight mechanics. Nptel syllabus introduction to helicopter aerodynamics and dynamics video course course detail a video course shall consist of 40 or more lectures with 1 hour duration per lecture. The book deals with torsional and bending vibrations of rotors, stability aspects, balancing and condition monitoring. Introduction to helicopter aerodynamics and dynamics by prof. Rotor dynamics modeling programs mechanical acoustics. Mathematical modelling and dynamics analysis of flat. Dynamics of high speed rotating equipment depend strongly on journal bearings. Fundamentals of fluid mechanics chapter 12 pumps and turbines jyhcherng shieh department of bioindustrial mechatronics engineering national taiwan university. Mohanty,department of mechanical engineering,iit kharagpur. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses.
Whirling can be defined as the rotation of the plane generated by the bent shaft and the centerline connecting the bearings. Also, rotor dynamics is a fundamental study to many rotary machines, which appear everywhere in our daily life ranging from jet engines to refrigerator compressors. Kascak propulsion laboratory, avradcom research azd techuology laboratories lewis research cetzter clevelarzd, ohio national aeronautics and space administration scientific and technical information office 1980. Power system voltage stability at any point of time, a power system operating condition should be stable, meeting various operational criteria, and it should also be secure in. Nptel provides elearning through online web and video courses various streams. Introduction to rotordynamics mathias legrand mcgill university structural dynamics and vibration laboratory october 27, 2009.
Systematic modeling of rotor dynamics for small unmanned aerial vehicles limin wu, yijie ke and ben m. Rajiv tiwari,department of mechanical engineering,iit guwahati. These types include horizontal and vertical pumps, compressors, steam turbines, motors, generators, alternators, geared systems, and gas turbines. Pdf the lecture introduces the basic problems in the rotordynamics of turbomachinery, excessive vibration and instability. Denis kotarski, department of mechanical engineering, karlovac university of applied sciences, j. Brgs 5day short course is designed to educate endusers and manufacturers on the basic principles of rotordynamics including lateral and torsional dynamics. The subject of this report is determining, by using force measurements, the dynamic response of a centrifugal pump in operation. Turbopump rotor dynamics because of high power density and low damping in rocket turbopumps, these machines exhibit in their most extreme form a variety of vibration effects, which are either absent or masked by normal damping mechanisms in. Click on any video lecture link to view and download that video. Search by nptel course id, course name, lecture title, coordinator.