Project

PERMAS4EDU

Goal: PERMAS4EDU (https://www.intes.de/edu) has essentially the same functionality as the commercial version of PERMAS. However, some limitations are introduced in the educational edition to prevent commercial usage. It is based on version 18 and available on Windows 10 and Linux, respectively. Therefore it is well suited for self-study and further training.

Methods: Python, Finite Elements, PERMAS, VisPER

Date: 1 July 2020

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Nils Wagner
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The example is taken from
Thanks to Jon Young for sharing the Nastran model of the stiffened plate. His support is greatly appreciated.
  • Nastran interface
  • Modal analysis
 
Nils Wagner
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The example is taken from
  • Harmonic Balance Method
  • Local Non-linearity
  • Different load levels
  • Backbone curve
  • Nonlinear frequency response
Please note, that you will need the most recent version of PERMAS (i.e. V19)
 
Nils Wagner
added an update
The example is taken from
  • Harmonic Balance Method
  • Back transformation into time domain
  • Nonlinear frequency response
  • Local non-linearities
Please note that you will need the most recent version of PERMAS (i.e. V19).
 
Nils Wagner
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The example is taken from
  • Harmonic Balance Method
  • Nonlinear frequency response
  • Local nonlinearities
  • Craig-Bampton method
Please note, that you will need the most recent version of PERMAS (i.e. V19)
 
Nils Wagner
added an update
The example is taken from
  • Modal analyses
  • Varying hole diameter
  • Sampling
 
Nils Wagner
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The example is taken from
  • Direct FSCOUPLED Frequency
  • Acoustic cavity
  • FSINTA4 (#288), QUAD4 (#144) , FLHEX8 (#6912) elements
 
Nils Wagner
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The example is taken from
  • Modal analysis
  • Modal damping
  • Modal frequency response
  • Sampling
  • Mesh morphing
 
Nils Wagner
added an update
The example is taken from
Thanks to Vesa Nieminen and Jussi Sopanen for sharing the Nastran model. Their support is greatly appreciated.
  • Nastran interface
  • Modal analysis
  • Natural frequencies
 
Nils Wagner
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The example is taken from
and
  • Node to node contact
  • Normal contact
  • Contact force
  • Displacements
 
Nils Wagner
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The example is taken from
  • Node to node contact
  • Initial gap
  • Load increment
 
Nils Wagner
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Nils Wagner
added an update
The example is taken from
Thanks to Thijs Willems for sharing results from experimental modal analysis. His support is greatly appreciated.
  • Experimental modal analysis
  • Numerical modal analysis
  • Modal Assurance Criterion MAC
  • Interface for EMA results in .unv format
 
Nils Wagner
added an update
The example is taken from
  • Modal analyses
  • Frequency response analyses
 
Nils Wagner
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The example is taken from
Thanks to Jessé Paixão for sharing an unstructured mesh in Nastran format. His support is greatly appreciated.
  • Modal analysis
  • Modal frequency response
  • Complex eigenvalues
  • Modal damping
 
Nils Wagner
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The example is taken from
  • SIMP
  • Compliance
  • Volume fraction
 
Nils Wagner
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The example is taken from
  • Modal Assurance Criterion
  • Natural frequencies
  • Mode shapes
 
Nils Wagner
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Nils Wagner
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Nils Wagner
added an update
The example is taken from
Thanks to Ludovic Renson and Mingming Song for sharing the finite element model.
Their support is greatly appreciated.
The first six mode shapes are rigid body like modes due to the soft elastic supports.
 
Nils Wagner
added an update
The examples are taken from
The finite element models were kindly provided by Professor Yu-Hsi Huang.
His support is greatly appreciated.
Remark: The second-order hexahedral elements were converted into linear hexahedral elements to fulfill the limits (i.e. number of nodes) of the free education edition.
 
Nils Wagner
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The example is taken from
 
Nils Wagner
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The example is taken from
Thanks to Chiu Ling Chan, Felix Scholz and Thomas Takacs for sharing two meshes in gmsh (.msh) format.
 
Nils Wagner
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Nils Wagner
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The rotor example is taken from
  • Static analysis
  • Modal analysis including geometric and convective stiffness matrices
  • Campbell diagram
 
Nils Wagner
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The example is taken from
  • Mass minimization
  • Compliance constraint
  • Filter
  • SIMP approach
 
Nils Wagner
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The example is taken from
  • Buckling constraints
  • Natural frequency constraints
  • Minimize mass/volume
  • SIMP
 
Nils Wagner
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The example is taken from
  • Variable position of a spring-damper attached to a beam
  • Modal analysis
  • Modal frequency response
  • Sampling - DOE
  • $MPC ILINE
 
Nils Wagner
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Nils Wagner
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The example is taken from
  • SIMP approach
  • Compliance
  • Volume fraction
  • Filter
 
Nils Wagner
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The example is taken from
  • Campbell diagram
  • pyINTES
 
Nils Wagner
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The example is taken from
  • Modal analysis
  • Modal response analysis
  • Direct response analysis
  • HHT method
  • 5000 HEXE8
 
Nils Wagner
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The example is taken from
  • Rotordynamics
  • Campbell diagram
  • Critical speeds
  • pyINTES
 
Nils Wagner
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  • Contact analysis
  • frictionless and frictional contacts
  • geometrically nonlinear analysis
 
Nils Wagner
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The examples are taken from
  • Compliance
  • Volume fraction
  • SIMP
 
Nils Wagner
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The example is taken from
The finite element model was kindly provided by Dr. Pierre. Many thanks for his support.
  • Cyclic symmetric structure
  • Co-rotating system
  • Additional matrices due to rotation
 
Nils Wagner
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The example is taken from
The corresponding finite element model was kindly provided by Tian Yuan. His support is greatly appreciated.
  • Linear buckling analysis
  • Imperfection is neglected
 
Nils Wagner
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The example is taken from
  • Static analysis
  • Line load
 
Nils Wagner
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The example is taken from
  • Experimental and numerical modal analyses
  • MAC matrix
  • Mode shapes
 
Nils Wagner
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The example is taken from
  • 100 beam elements
  • Sizing optimization
  • Design variable Young's modulus
  • Natural frequency constraints
  • Constraint function (i.e. least squares)
 
Nils Wagner
added an update
The example is taken from
A finite element model was kindly provided by D. J. Wagg and Matthew S. Bonney. Their support is kindly appreciated.
The unstructured mesh was replaced by a structured mesh to fulfill the limits of the education edition of PERMAS.
 
Nils Wagner
added an update
The example is taken from
  • Modal analysis
  • Modal frequency response
  • Viscous damper
  • varying position of the damper
  • SAMPLING
 
Nils Wagner
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The example is taken from
  • Compliance
  • Volume fraction
  • SIMP
 
Nils Wagner
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The example is taken from
  • Node to Node contact
  • Compliance
  • Volume constraint
 
Nils Wagner
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The example is taken from
gmsh models and additional information was kindly provided by Joshua Meggit. His support is greatly appreciated.
 
Nils Wagner
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The example is taken from
  • Maximize compliance
  • Prescribed displacements
  • Half model
  • Volume fraction 0.35
 
Nils Wagner
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Nils Wagner
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The example is taken from
  • Position Optimization
  • Natural frequencies
 
Nils Wagner
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The example is taken from
  • Compliance
  • Volume fraction
  • SIMP
 
Nils Wagner
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The example is taken from
The finite element model was kindly provided by Hari Simha. His support is greatly appreciated.
  • Mooney-Rivlin material
  • 9328 TET4 elements
  • 2129 nodes
 
Nils Wagner
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The example is taken from
The finite element model (i.e. nodal point coordinates, element connectivities, beam properties) was kindly provided by Dr. Mingqiang Xu. His support is greatly appreciated.
  • 27 beam elements
 
Nils Wagner
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The example is taken from
  • Newmark method
  • Lumped mass matrix
  • Central difference method
  • Heaviside load
 
Nils Wagner
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The example is taken from
  • Orthotropic material
  • Material reference system
  • Static analysis
  • 4 layers with 100 elements each --> 400 HEXE8 elements
 
Nils Wagner
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Nils Wagner
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The example is taken from
  • Modal analysis
  • Modal frequency response
  • FRF
  • Acceleration
 
Nils Wagner
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The example is taken from
  • Modal analysis
  • 9600 QUAD4 elements
  • 9801 Nodes
 
Nils Wagner
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The example is taken from
The finite element model was kindly provided by Zhijun Wang and Akke Suiker. Their support is greatly appreciated.
  • SIMP approach
  • Compliance
  • Volume fraction
 
Nils Wagner
added an update
The example is taken from
The finite element model was kindly provided by Hossein Soleimani, Ender Cigeroglu and Nevzat Özgüven. Their support is greatly appreciated.
  • Modal analyses
  • Modal frequency response analyses
  • Structural damping
  • Sampling
  • The joint is represented by a spring element with 6 degrees of freedom
  • 2 design variables are used for translational and rotational stiffness
 
Nils Wagner
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Nils Wagner
added an update
The example is taken from
A CAD model of a sector was kindly provided by Tino Wollmann. We are very grateful for his support.
  • Sampling
  • Area of circular clamped region is modified by a mesh morphing approach
  • Cyclic symmetry
  • Co-Rotating reference system
  • Natural frequencies
  • Additional matrices due to rotation, i.e. geometric and centrifugal stiffness, Coriolis
 
Nils Wagner
added an update
The example is taken from
A CAD model of a sector was kindly provided by Tino Wollmann. We are very grateful for his support.
  • 60° generic steel rotor
  • Centrifugal load
  • 2500 rpm
  • Radial displacement
 
Nils Wagner
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Nils Wagner
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Nils Wagner
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The example is taken from
The finite element mesh was kindly provided by Professor Jie Deng. We are very grateful for his support.
  • Spatially varying thickness
  • Modal analysis
 
Nils Wagner
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Nils Wagner
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The example is taken from
  • Modal Timehistory
  • Newmark method
  • Initial conditions
  • Free vibrations
 
Nils Wagner
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Nils Wagner
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The example is taken from
  • SIMP
  • Contact analysis
  • Friction
  • Compliance
  • Volume fraction
 
Nils Wagner
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The example is taken from
  • Inertia load case
  • Static analysis
  • Buckling Analysis
  • Sampling
 
Nils Wagner
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The example is taken from
  • 50 beam elements, i.e. BECOS
  • viscous damping coefficient is varied
  • Complex eigenvalues
  • Sampling
 
Nils Wagner
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The example is taken from
  • Coarse mesh
  • Fine mesh
  • Natural frequencies
 
Nils Wagner
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The example is taken from
  • Optimization
  • Compliance
  • ITEM COOR MOD
  • ITEM MODL NEWCOOR
 
Nils Wagner
added an update
The example is taken from
Thanks to Matthew Brake, Nidish Narayanaa Balaji and Justin Porter for sharing the corresponding finite element model.
  • Frictional contact
  • Bolt pretension
  • Contact linearization by $CONTLOCK
  • Modal analysis
 
Nils Wagner
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The example is taken from
  • Mesh morphing
 
Nils Wagner
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Nils Wagner
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Nils Wagner
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Nils Wagner
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Nils Wagner
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The example (i.e. Case 1) is taken from
  • Various boundary conditions
  • Non-dimensional frequencies ($RESEXT FUNCTION)
 
Nils Wagner
added an update
The example is taken from
Thanks to Yongfeng Wang, Yanhong Ma, Jie Hong, Giuseppe Battiato and Christian Maria Firrone for sharing the corresponding finite element model. Their support is greatly appreciated.
 
Nils Wagner
added an update
Nils Wagner
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Nils Wagner
added an update
Nils Wagner
added an update
The example is taken from
  • Modal analysis
  • Sampling procedure
  • Young's modulus and density are uncertain-but-bounded parameter
 
Nils Wagner
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Nils Wagner
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The example is taken from
  • Sampling
  • Influence of spring stiffness on natural frequencies
  • pyINTES
 
Nils Wagner
added an update
The example is taken from
Thanks to Rafael de O. Teloli and Gaël Chevallier for sharing an unstructured mesh in Nastran format.
  • Structured mesh (9752 HEXE8 elements, 16281 nodes)
  • Pretension
  • Frictional contact (Coulomb)
  • Contact linearisation, i.e. $CONTLOCK
  • Free vibration analysis
 
Nils Wagner
added an update
The example is taken from
  • Real eigenvalues (i.e. VIBRATION ANALYSIS )
  • Complex eigenvalues (i.e. MODAL COMPLEX)
  • Material damping
  • Loss factor
 
Nils Wagner
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  • Design space exploration
  • Mesh morphing
  • SAMPLING
  • pyINTES
 
Nils Wagner
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Nils Wagner
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  • Linear temperature gradient in the radial and axial direction
  • Library function
  • 864 HEXE27 elements
 
Nils Wagner
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  • Plane stress
  • 2301 QUAM9 elements
 
Nils Wagner
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  • Thick plate
  • Uniform pressure load (1MPa)
  • Static analysis
  • 5076 HEXE8 elements
 
Nils Wagner
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The example is taken from
 
Nils Wagner
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The example is taken from
  • Comparison of dynamic responses for different values of the large Mass M
 
Nils Wagner
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Nils Wagner
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Nils Wagner
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