Introduction to rotordynamic fe analysis, part1 youtube. Solid model rotor dynamics provides an accurate solution for such problems. Although fully automated, ansys meshing offers a number of controls that allow users to satisfy their own meshing requirements. Complicated rotor dynamic simulation with ansysabaqus or madyn 2000. Introduction rotor dynamics is the key in design and maintenance of all rotating machinery, which forms the backbone of industrial infrastructure and plays an important role in the growth and development of the country. Start by creating a rigid dynamics analysis system and importing geometry. Hi all, i have some questions reffering to ansys capabilities to resolve some rotordynamics problems. Ansys parametric design language has been implemented to achieve the results sinou16 investigated the response of a rotors non linear dynamics which is supported by roller bearings. It explains the critical speed, approach to solve rotordynamic analysis, balancing machine, campbell diagram, rotordynamic equations. Completion of ansys mechanical getting started is required.
If, in addition, the rotor is axisymmetric, the properties of the rotor do not depend on rotation angle. I am wanting to investigate critical speeds and understand if the rotor will be stable at 100 krpm. Covers solid modeling, stress analysis, conductionconvection heat transfer, thermal stress, vibration, buckling and nonlinear problems. Pdf ansys dynamic analysis tutorial rotor dynamic analysis using ansys ansys rigid body dynamics ansys vibration analysis ansys shock analysis. 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. The rotor dynamic analysis provides the natural frequencies taken as a function of rotational speed in form of campbell diagrams and the response behavior due to an unbalance excitation considering tumbling behavior is. But builtin elements are there in ansys for rotor dynamics modeling. Rotordynamic with ansys mechanical solutions in this tutorial we conduct a rotordynamics analysis and parametric study using ansys mechanical and ansys workbench. Typically, the focus of said analysis regards obtaining values known as. The dynamic characteristics analysis of rotor blade based.
More knowledge and time needs to form the rules to modeled a rotor and developing the analysis methods. If you continue browsing the site, you agree to the use of cookies on this website. Rightclick the geometry cell of the rigid dynamics system, and select import geometrybrowse. Here are some things ive learned with the new version of ansys. Devices such as engines, motors, disc drives, and turbines all develop characteristic inertia effects that can be analyzed to improve the design and decrease the possibility of failure. Turbomachinery, motors, shafting, all of these industries have relied upon ansys for simulating various aspects of their devices. Rotordynamic with ansys mechanical solutions youtube. Dec 12, 2017 rotordynamic with ansys mechanical solutions in this tutorial we conduct a rotordynamics analysis and parametric study using ansys mechanical and ansys workbench. Rotordynamics for ansyshas been created as a problem oriented macro based tool which is integrated in ansys and makes it easier for the user to deal with rotor vibration problems. Lectures will be given for each topic and the attendees will be able to create and run models in different handson exercises. Rotor dynamics analysis of a multistage centrifugal pump. The experimental analysis of vibration monitoring in. A rotor dynamic model is developed by using finite element method fem, the rotor includes impellers, bearings and seals. Describe and apply the essential rotordynamics analysis capabilities.
The threedimension finite element model of helicopter rotor blade has been built with apdl language. Dynamic and control analysis of a smart rotor by combining the ansys and matlab software piotr cupial1, mateusz koziol2 department of process control, faculty of mechanical engineering and robotics, agh university of science and technology, krakow, poland 2corresponding author email. Rotordynamics simulation is important to all machine types and is an essential element of turbine design, compressor design etc. Nrel is operated by midwest research institute battelle contract no.
The solid models allow significant advantages by eliminating tedious, timeconsuming. Rotor of low pressure turbine burst in 30 pieces 0 kg piece found in 1. Step by step tutorials teach you to use ansys workbench 14. Rotordynamisk analys av 3dmodellerad gasturbinrotor i ansys.
Ansys isnt working perfectly yet, there are some problems. Effect of bearing housings on centrifugal pump rotordynamics. Pdf ansys apdl for gas turbine structural dynamic design. Ansys apdl for gas turbine structural dynamic design. Optimization of the parameters of the tilting pad bearings and rotor to minimize the power loss at bearings the bearing loads are not equal different stiffness and damping coefficients are input for left. The unbalance that exists in any rotor due to eccentricity has been used as excitation to perform such an analysis. Nov, 2009 here are some things ive learned with the new version of ansys. Rotor dynamics with ansys mechanical solutions rotation 3. There is a growing tendency today to extract information about the prognostic parameters based on system analysis through various diagnostic techniques to assess the health of the plant or equipment. Jul 01, 2018 this video explains the introduction to rotordynamic analysis. Rotor dynamics with ansys mechanical solutions rotation. Solid186 is a higher order 3d 20node solid element that exhibits quadratic displacement behavior.
February 23, 2007 a publication for ansys users issue 55 spinning up rotor dynamics by eric miller for decades, ansys software has been the dominant tool for people who make machines that spin. I have set up a simulation of a highspeed machine rotor that i have designed. However ansys have a good potential to be an additional tool for calculations of rotor dynamics, because more complex calculations and simulations can be done. Modalharmonic analysis using ansys me 510499 vibroacoustic design dept.
It accounts for fluid, mechanical and rotational loading on rotating components, as well as their interactions with the supporting structure. You can simulate that in ansys using the ansys s rotor dynamics modeling capability. Rotor dynamcis of a centrifugal pump technical university eindhoven, february 2006 52 whirl of simple rotors in rotor dynamics a common phenomenon is whirling. Ansys store rotordynamics toolsv1 created by ansys inc. This video explains the introduction to rotordynamic analysis. Next, through the supporting bearings and through the fluid encircling the rotor unless the rotor operates in vacuum, the rotor lateral vibrations are transmitted to. The rotor rotates about the zaxis and has no lateral movement about that axis. I dont yet see a sticky for helptutorials, so ill just post here. Dynamics modeling and loads analysis of an offshore floating wind turbine. Paidup license means a license that has a license term commencing on the effective date of programs and continuing in perpetuity unless earlier terminated in accordance with the terms of this. Most often, they represent the lowest modes of the entire machine structure. Rotordynamic validation of a twin rotorbearing system. The experimental analysis of vibration monitoring in system. Structural dynamics and vibration laboratory october 27, 2009.
Static and dynamic analysis of lathe spindle using ansys. Ansys v11 rotor dynamics web seminar free download as pdf file. Rotordynamisk analys av 3dmodellerad gasturbinrotor i. Thermal effects, modelling, campbell diagram, whirl, rotor dynamics. Rotor dynamics analysis is an important calculation step to design efficient and reliable rotating equipment. Rotor dynamics is the study of vibration behavior in axially symmetric rotating structures. Mesh the geometry is meshed using the ansys meshing platform. The inclusion of the stiffness of bearing housing designs will allow to determine rotor dynamics of. Finite element simulations with ansys workbench 14. Ansys computes a displacement at bearings locations. Introduction equations of motion structural analysis case studies references history and scientists history and scientists 7 27 1869 ankine r on the centrifugal force on rotating shafts steam turbines notion of critical speed 1895 oppl f, 1905 belluzo, stodola notion of supercritical speed 1919 effcott j the lateral vibration of loaded shafts in the neighborhod. Oct 20, 2010 over the years, ansys mechanical programs dynamics capabilities have evolved according to the emerging analysis needs, maturity of analysis methods and increasing computing power.
There is a wide range of dynamics capabilities available within the ansys structural mechanics product portfolio. I have an assembly which contains some axes and reduction or multiplication gear with augment lagrange contactfrictional contact throught teeth of gears, last versions of ansys can introduce in system perturbation. The dynamic characteristics analysis of rotor blade based on ansys nianzhao jiang, xianglin ma, zhiqing zhang the research institute of simulation technology of nanjing, no. You can simulate that in ansys using the ansyss rotor dynamics modeling capability. The object of the analysis is to calculate the critical speeds of a rotor to find out if there are sufficient margins of separation between critical speed and the rotor operating speed. Ansys advantage volume iv, issue 2, 2010 45 tips and tricks 2. Ansys rotor dynamics, cfd online discussion forums. In the workbench project page, drag a rigid dynamics system from the toolbox into the project schematic. Rotor dynamics of the barrel casing centrifugal boiler feed pump rotor depends on various entities, the most important of which are hydrodynamic processes within plain bearings and annular seals, and the static stiffness of bearing housings. Rotordynamics simulation titelmasterformat durch klicken. Rotor dynamics analysis of a multistage centrifugal pump harisha.
In recent days, the study about rotor dynamics has gained more importance within steam. Designed for both practicing and student engineers. Rotating shafts this type of a rotating structure can be analyzed using two cases the symmetric case and the unsymmetric case. Ansys analysis compression tools rotor dynamics additional tools useful for modeling rotating machinery, such as electric turbo generators, in modal, harmonic and transient dynamic analyses the design mantra lighter, faster, stronger is pervasive across industries from consumer electronics to space exploration. Simplified model in ansys designmodeler additional disk bearing locations initial 3d geometry rotordynamics analysis. Next, through the supporting bearings and through the fluid encircling the rotor unless the rotor operates in vacuum, the rotor lateral vibrations are transmitted to the nonrotating parts of the machine. Rotor dynamics with ansys mechanical solutions free download as powerpoint presentation. Complicated rotor dynamic simulation with ansysabaqus or. Dynamic and control analysis of a smart rotor by combining. The main objective of creation of the tool was to use the maximum of ansys. Ansys is a common tool for finite element analyses and it is widely used in research and development of rotating machinery.
This training course will give attendees the tools required to utilize the powerful rotordynamics modelling and simulation capabilities within ansys. Optimization of the parameters of the tilting pad bearings and rotor to. The dynamic characteristics analysis of rotor blade based on. If ansys finds that quantity before it finishes the frequency range. Geometry mesh mechanical apdl response surface goaldriven optimization figure 2.
A vibration signature measured at the external surface of machine or at any other suitable place contains a good amount of information. When calculating the rotor dynamics of systems with hydrodynamic bearings, the nonlinear fluid film forces are reduced to linearize stiffness and damping coefficients. Introduction equations of motion structural analysis case studies references outline 2 27 1 introduction. Vibration monitoring helps in reducing the machine down time. Over the years, ansys mechanical programs dynamics capabilities have evolved according to the emerging analysis needs, maturity of analysis methods and increasing computing power.
The programs rotor dynamic analysis technology has developed at a rapid pace to meet the requirements of industry. The element is defined by 20 nodes having three degrees of freedom per node. Collaboration between ansys and romac bearing interface for. Bearing forces by integrating pressure profile on fluid area pressure profile by solving short reynolds equation laminar flow fluid with constant density and viscosity. Rotor dynamic analysis of steam turbine rotor using ansys nagaraju tenali 1 and srinivas kadivendi corresponding author. Singhal, in 10th international conference on vibrations in rotating machinery, 2012. Ansys mechanical apdl as a system of linked tools that share data. Often it can be observed in practice, which makes this physically easy to interpret. Fluent, cfx, turbulence models, interior or exterior flow, free surfaces.