The rotor dynamics capability in msc nastran provides users with a relatively simple method of performing the design and analysis of structures with rotating. These guidelines include definitions of terms, recommended separation margins from critical speeds, allowable shaft vibration, allowable residual unbalances and stability acceptance. Nastran rotordynamics background 1998 meeting with engine and airframe manufacturers and msc. This primer provides documentation for using msc nastran in analyzing rotating flexible blades. Normal modes analysis for prestiffened structures 5. Msc nastran advanced nonlinear tm simulate reality with. A general method for rotordynamic analysis springerlink. This guide describes the method of the rotor dynamic analysis in nx nastran, as well as the. Cad import and automatic meshing library of elements all analysis types including prestress dedicated postprocessing multispool dynamics simulation direct connection to bearing codes account for the flexibility of the supporting structure andor the disks. Data statements have either been manually added or incorporated by include. Basic msc nastran linear static and normal modes analysis nas101 table of contents lesson title. How to setup and analyze structural models with one or more rotating components.
It has beam element rotordynamic example page 96127. Wing structure static analysis using superelement sciencedirect. Lateral vibration analysis rotordynamics, critical speed. Pdf rotordynamic analysis using 3d elements in fixed and.
Nastran can do dynamics, both harmonic and transient. Rotordynamic analysis for coupled rotating and stationary components for example. Nastran 2014 design sensitivity and optimization users guide. To overcome these issues, msc nastran 2018 provides new modules that make substructure assembly management much easier. Rotating shafts this type of a rotating structure can be analyzed using two cases the symmetric case and the unsymmetric case. Msc simcompanion msc nastran 2012 linear static analysis. Nastran books, xii technical support, xiii internet resources, xv permission to copy and distribute msc documentation, xvii 1 nastran command and input data introduction, 2 nastran command, 7 the nastran statement optional, 8 file management section fms, 9 executive control section, 10. In this case a simple model of a cantilever plate under a singlepoint cyclic load is used. It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk storage. Rotordynamics analysis services engineering dynamics. With msc nastran, users can model the effects of the various disciplines. The users manual is instructive and encyclopedic in nature, but is restricted to those items related to the use of nastran that are generally independent of the computing system being.
Nx nastran is an enhanced proprietary version developed and maintained by. Jun 11, 2011 in this case a simple model of a cantilever plate under a singlepoint cyclic load is used. Im surprised that you havent found any info on this. This paper focuses on the use of msc nastran for certification level analysis. Msc nastran usermeeting 2011 and the complex stress components contains the conjugate complex values of the stress components sx sy sz sxy sxz syz st h h h h h h 1 x. Rotordynamic analyses using the 1d modeling approach, where the. Sm astros theoretical manual for version 20 universal analytics, inc. The first book in the series, getting started with msc nastran users guide, is intended for those readers who are unfamiliar with the finite element method, those who have never run msc nastran, or those who are interested in a general overview of msc nastrans capabilities. Delivers engineering simulation speed with support for larger models. At its most basic level, rotor dynamics is concerned with one or more mechanical structures. Training 2014 4 about msc software simulating reality, delivering certainty msc software is one of the ten original software companies and the worldwide leader in multidiscipline simulation. Set database units british or metric define or import from cad tools geometry create finite element mesh define materials isotropic, orthotropic, anisotropic define laminate sandwich materials. Pamidi, hemant patel msc software, glendale, california, ca 91203 abstract axisymmetric harmonic elements provide an efficient way to capture.
Contact us for more information about our machinery vibration services or rotordynamic analysis capabilities. This tutorial presents how to make an analysis with natran patran. A nastran primer for the analysis of rotating flexible blades. Basic mscnastran linear static and normal modes analysis. Rpc files in fatigue analysis to define the cyclic variation in the loading needed for fatigue analysis using the pseudostatic method, msc nastran allows the user to define a table or to define an external dac formatted file with this information.
Modern jet engines have to fulfil the requirements for high thrusttoweight ratio and improved maintainability by modular design. Rotordynamics, also known as rotor dynamics, is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures. Also a lot of commands and execution needs to be done manually and the. Rotordynamic analysis using 3d elements in fixed and rotating reference frame.
Newport beach, cabusiness wire december 9, 20 msc software corporation, the leader in. Pt6 engine results in msc nastran for bending motions with highfidelity twodimensional 2d axisymmetric harmonic and threedimensional 3d shell and solid elements. These analyses are used in all parts of the design process, from conceptual design to final certification and fleet support. Modules are standalone sections of the msc nastran input file that represent a component of a full assembly i. Msc nastran 2012 release guide table of contents preface to the msc nastran 2012 release guide viii list of books viii technical support ix online resources ix msc nastran documentation ix 1 overview of msc nastran 2012 overview 2 2 linear analysis smart linear contact defaults sol 101 6 3 advanced nonlinear sol 400. Msc nastran rotordynamics msc software corporation. Composite analysis using nastran patran process of finite element analysis. Cadintegrated, multidisciplinary simulation solutions special solutions msc fatigue. Inertia relief analysis of nastran onda marineocean 9 jun 09 16. Inertia relief analysis of nastran nastran engtips. The influence of tilting pad bearing clearance on rotor response of a steam turbine, howes and leung 1984 pdf simplified prediction of balance sensitivity, howes and masterson, 1990 pdf a centrifugal compressor synchronous motor case history, howes.
This presentation gives an overview of the use of mscnastran in the analysis of rotating flexible blades lawrence, et al. Light weight constructions consequently make use of thinwalled casings of nonisotropic behaviour, chemically etched or machined isogrids and fibrereinforced plastics. Simulation of structures and fluids in the short time dynamics area sinda. Summary msc nastran explicit nonlinear sol 700 provides a powerful combination of solvers using the industry standard msc software nastran bulk data input. At each time step, this single executable couples lstc lsdyna fea structurecontact locations and velocities with forces from msc. Development, msc software theme analysis productivity. Nas123 implicit nonlinear analysis using msc nastran sol600 39 nas124 thermal analysis using msc nastran sol400 39 nas126 explicit nonlinear analysis sol700 using msc nastran and patran 40 nas127 rotordynamic analysis using msc nastran 40 nas3 contact analysis using msc nastran and patran 41. Jet engines, turbines, compressors, energy storage devices. Perturbation analysis to perform a linear analysis based on the nonlinear equilibrium state of a structure multiple options for perturbation analysis, including linear statics, normal modes, buckling, direct and modal frequency response. It is assumed that the reader have prior knowledge of msc nastran fundamentals as well as the proficient knowledge of solid mechanics. Evaluation of 3d rotordynamics capabilities within nx nastran.
The geometrically nonlinear analysis using nastran solution sequence 64 is discussed along with the determination of frequencies. There is a pdf at the attachment which is msc nastran 2016 rotor dynamics guide. New release of msc nastran delivers engineering simulation. The text covers the entire spectrum of nonlinear structural analysis. Msc nastran aeroelastic analysis users guide rodden, william, johnson, erwin on. Rotor dynamic analyses with finite elements can easily become. The msc nastran rotordynamics procedures are developed with input from aircraft engine manufacturers to ensure that their critical requirements are satisfied. Mar 09, 2017 the high fidelity rotordynamic analysis capabilities of msc nastran enable you to simulate rotating systems containing any number of rotors and stators, which include. This handbook is developed as tutorial material for msc nastran users to solve nonlinear structural problems.
Nx nastran rotor dynamics applications the following is a list of common industryspecific problems that can be analyzed using the nx nastran rotor dynamics application. In spite of staggering advances in computation, however, the socalled fe rotor models are still considered to be quite large. Nastran does not have a builtin nonlinear hydrodynamic journal bearing model. The high fidelity rotordynamic analysis capabilities of msc nastran enable you to simulate rotating systems containing any number of rotors and stators, which include.
Nas127 rotordynamic analysis using msc nastran the purpose of this seminar is to introduce the rotordynamic capabilities in msc nastran. Basic mscnastran linear static and normal modes analysisnas101 table of contents lesson title. Analysis and testing of mscnastrans new rotordynamic capability abstract analysis and testing of mscnastrans 2004 new rotordynamic capability was performed and compared with theoretical calculations. Nas120 linear static analysis using msc nastran and patran and nas122 basic dynamic analysis using msc nastran and patran or. A detailed description about dynamics of rotor and finite element. I believe that nastran was originally developed for this kind of analysis. Scientific and technical information office, national aeronautics and space administration. Advanced cae applications for professionals software that works for you. The theoretical manual gives an excellent introduction to nastran and presents developments of the analytical and numerical procedures that underlie the program. 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 analysis of these blades includes geometrically nonlinear large displacement analysis under centrifugal 1oadlng, and frequency and mode shape normal modes determination. The model is a simple cantilever beam with 48 elements and. All the nastran cards necessary to perform a random run are described here. Fundamentalsofaeroelasticanalysis introductiontoaeroelasticanalysisanddesign aerodynamicdatainputandgeneration aerodynamictheories. Mscnastran 101 exercise workbook 23 model description. This handbook is developed as tutorial material for mscnastran users to solve nonlinear structural problems. Nas101basic mscnastran linear static and normal modes analysis. There are a number of options for response spectrum and random analysis as well. Create an input file for finite element truss with segments in tension or compression connected by smooth pins. It is assumed that the reader have prior knowledge of mscnastran fundamentals as well as the proficient knowledge of solid mechanics. Tools for a multiaxial fatigue analysis of structures submitted to random vibrations. Pdf high fidelity rotordynamic analysis researchgate.
Software all manufacturers performing similar types of analysis all manufacturers using similar, but self developed and maintained, software tools common need to develop standardized analysis tools. Rotordynamics analysis recommended guidelines for rotordynamic characteristics are given in specifications such as the american petroleum institute api standards. The geometrically nonlinear analysis using nastran solution sequence 64 is discussed along with the determination of frequencies and mode shapes using solution sequence 63. Msc software is pleased to introduce you to the latest release of msc nastran with enhancements to fatigue, acoustic, rotordynamics, optimization and nonlinear analyses, in addition to dynamic analysis performance, which are all designed to improve user productivity. This presentation gives an overview of the use of msc nastran in the analysis of rotating flexible blades lawrence, et al. Procedia engineering 41 2012 1600 a 1606 18777058 2012 published by elsevier ltd. Efficient rotordynamic analysis using the superelement. Contents introduction 1 basic msc nastran concepts 2 partl statics problem 1 7 1. The rotor dynamics capability in msc nastran provides users with a relatively simple method of performing the design and analysis of structures with rotating components. Msc nastran 2018 ten tech llc engineering services. High fidelity rotordynamic analysis devesh kumar, p. Calculations of the forward and backward modes of an. Msc nastran is an industryleading tool for aeroelastic analysis for aircraft design and certification for loads, dynamics, and flutter. Furthermore, power plant personnel are often required to manually identify faults on.
Rotordynamics users guide msc nastran 2016 mafiadoc. The course will cover rotordynamic analysis for coupled rotating and stationary components, for example, jet engines, turbines, compressors and energy storage devices. Msc nastran dynamic analysis users guide, version 2016. This book is one in a series of users guides describing the use of msc nastran.
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