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compatibility between SAMCEF modules makes it possible to perform a structural calculation while taking into account the dynamic analysis of rotating
parts provided by SAMCEF Rotor.
SAMCEF Rotor can also be coupled with BOSS quattro, the application manager and optimization platform developed by SAMTECH.
The following SAMCEF modules are compatible with SAMCEF Rotor:
• SAMCEF Asef, Dynam, Stabi: linear static, modal and buckling analyses,
• SAMCEF Mecano: unique integrated software that solves non-linear structures and mechanisms problems. The software is declined to provide a
more specific answer to following analyses:
• MECANO Structure: dedicated to the non-linear analysis of structures,
• MECANO Motion: dedicated to the static, kinematical and dynamic analyses of flexible mechanisms,
• MECANO Cable: dedicated for the analysis of cable systems subjected to electro-dynamic and aerodynamic efforts,
• SAMCEF Thermal: Stationary and transient non-linear themes analysis,
• BOSS quattro : parametric studies, sensitivity analysis, statistical analysis, model updating, design of experiments and response surfaces.
PLATFORMS
SAMCEF Rotor is available on most UNIX platform and on Window NT, 2000 and XP Pro.
SENSITIVITY AND STATISTICAL ANALYSIS
In the frequency domain, it is possible to carry out a sensitivity analysis of the solution with respect to a variation of a set of design
parameters. These parameters can be the dynamic characteristics (stiffness, damping) of the bearing elements.
The sensitivities can then be used to estimate the standard deviation of the solution when the standard deviation of the parameters is
given.
FREQUENCY RESPONSE ANALYSIS
Several methods are available to compute the harmonic response to unbalances or asynchronous loads.
The Modal Method where the forces and matrices are reduced by projection in a modal basis and the Direct Method that allows taking into
account local non-linearities (clearances, non-linear stiffness, etc).
TRANSIENT RESPONSE ANALYSIS
Transient response simulates run-up (or run-down) and blade losses. It is using a
Newmark integration method. Non-linear effects such as clearances, squeeze-films,
hydrodynamic bearings or rubbing are solved using an iterative Newton scheme. An
automatic time stepping strategy is available. If necessary, an initial static computation can
be performed.
USER INTERFACE
• All features can be accessed through scrolling menus and data
acquisition boxes;
• Easy-to-use integrated CAD modeler helps modeling and data
preparation;
• Grouped management allowing to work independently of node
and mesh numbering;
• Functions Manager facilitating the definition of variable loads,
rotation speed or properties;
• The command language can be parameterized;
• The User’s Manual is available using HTML Browser.
CURVES
• The displacements, forces, reactions or stresses
obtained by the forced response and as a function
of time or frequency;
• Orbits after the transient analysis;
• Confidence range of the harmonic response after a
statistical analysis.
MODELING ENVIRONMENT
EIGENVALUES
• The damping coefficients and frequencies
as a function of the rotational speed
(Campbell diagram);
• The damping coefficients and frequencies
following a variation in certain design
parameters;
• Confidence range of the Campbell
diagram after a statistical analysis.
GRAPHICAL POST-PROCESSING
LINKING DEVICES AND SPECIALIZED ELEMENTS
• Many linking devices such as linear and non-linear bearings, squeeze-films dampers (several models), bushing, gear and control
elements (sensors and actuators) are available;
• Linear constraints and rigid bodies can be defined between degrees of freedom;
• The inertia and energy properties of a group of elements can be obtained using macro elements;
• A model-linking element is used to connect an axisymmetrical model of the rotor with a 3-D description of the fixed parts;
• Finally, routines are available in order to generate user elements.
AXISYMMETRICAL MODEL
Flexible rotors are modeled by 2-D axisymmetrical shell
or volume finite elements whose displacement field is
developed in Fourier series. With this approach, it is no
longer necessary to make a distinction between shaft
and disks.
MODELING
SAMCEF Rotor can handle rotors with different rotation
speeds and the user is free to choose the orientation of the
spin axis. We can model the fixed parts using the standard
finite element library.
Superelements (CRAIG and BAMPTON) can be used to model
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