added an

**update**Project

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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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

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- 7.35 KBFull_Plate.zip

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**)

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- 2.66 KBtaylan_cloop.dat
- 948 Btaylan_cloop.uci
- 908 Btaylan.py

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**).

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- 1.21 KBtaghipour.uci
- 4.33 KBtaghipour.dat
- 1.12 KBtaghipour.py

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**)

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- 1.85 KBnidish.uci
- 15.14 KBnidish_model.dat
- 1.41 KBnidish1.py
- 1 more attachment

The example is taken from

- Direct FSCOUPLED Frequency
- Acoustic cavity
- FSINTA4 (#288), QUAD4 (#144) , FLHEX8 (#6912) elements

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- 247.53 KBhoubiao.tar.gz

The example is taken from

- Modal analysis
- Modal damping
- Modal frequency response
- Sampling
- Mesh morphing

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- 2.71 KBbrian_sampling.tar.gz
- 662 Bbrian.py

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

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- 1.97 KBbeam_example.tar.gz

The example is taken from

and

- Node to node contact
- Normal contact
- Contact force
- Displacements

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- 29.16 KBsimon.tar.gz

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

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- 99.19 KBthijs_accema_clamped.tar.gz

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

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- 19.42 KBplate_beam.tar.gz

The example is taken from

- Modal Assurance Criterion
- Natural frequencies
- Mode shapes

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- 80.31 KBmehran.tar.gz

The example is taken from

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- 2.05 KByu_cloop.zip
- 603 Byu.py

The example is taken from

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- 1.82 KBmeggitt.tar.gz

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.

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- 49.64 KBWing_engine_12springs.tar.gz

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.

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- 282.48 KBmodify-xy-x_edu.tar.gz
- 282.53 KBmodify-xy-y_edu.tar.gz

The example is taken from

Thanks to Chiu Ling Chan, Felix Scholz and Thomas Takacs for sharing two meshes in gmsh (.msh) format.

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- 616.93 KBconcave_void_exp.dat
- 230 Bconcave_void_exp.uci

The example is taken from

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- 77.05 KBeidukynas.tar.gz

The rotor example is taken from

- Static analysis
- Modal analysis including geometric and convective stiffness matrices
- Campbell diagram

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- 2.56 KBxinxing.tar.gz

The example is taken from

- Mass minimization
- Compliance constraint
- Filter
- SIMP approach

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- 184.08 KBlarsson_topo.tar.gz

The example is taken from

- Buckling constraints
- Natural frequency constraints
- Minimize mass/volume
- SIMP

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- 150.89 KBweiwei_topo1.tar.gz

The example is taken from

- Variable position of a spring-damper attached to a beam
- Modal analysis
- Modal frequency response
- Sampling - DOE
- $MPC ILINE

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- 2.76 KBwang.tar.gz

The example is taken from

- Modal analysis
- Modal response analysis
- Direct response analysis
- HHT method
- 5000 HEXE8

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- 159 KBlei_zhou.tar.gz

The example is taken from

- Rotordynamics
- Campbell diagram
- Critical speeds
- pyINTES

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- 4.32 KBrunchao.tar.gz

- Contact analysis
- frictionless and frictional contacts
- geometrically nonlinear analysis

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- 466.87 KBgear_base_model_edu.tar.gz

The examples are taken from

- Compliance
- Volume fraction
- SIMP

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- 355.65 KBxiaoya.tar.gz
- 410.59 KBxiaoya_d.tar.gz

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

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- 287.45 KBCycNat_12.zip

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

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- 301.87 KBBuckling_of_stiffened_plate.tar.gz

The example is taken from

- Experimental and numerical modal analyses
- MAC matrix
- Mode shapes

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- 219.21 KBzaletelj.tar.gz

The example is taken from

- 100 beam elements
- Sizing optimization
- Design variable Young's modulus
- Natural frequency constraints
- Constraint function (i.e. least squares)

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- 1.66 KBroger.tar.gz
- 2.66 KBroger_opt.tar.gz

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.

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- 155.09 KBdavid_edu.tar.gz

The example is taken from

- Modal analysis
- Modal frequency response
- Viscous damper
- varying position of the damper
- SAMPLING

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- 210.70 KBfarhadi.tar.gz

The example is taken from

gmsh models and additional information was kindly provided by Joshua Meggit. His support is greatly appreciated.

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- 292.58 KBframe.tar.gz

The example is taken from

- Maximize compliance
- Prescribed displacements
- Half model
- Volume fraction 0.35

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- 235.79 KBivarsson_topo.tar.gz

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

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- 187.32 KBhari.tar.gz

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

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- 2.06 KBmingqiang.tar.gz

The example is taken from

- Newmark method
- Lumped mass matrix
- Central difference method
- Heaviside load

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- 13.29 KBsoares.tar.gz

The example is taken from

- Orthotropic material
- Material reference system
- Static analysis
- 4 layers with 100 elements each --> 400 HEXE8 elements

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- 16.76 KBheng_ouyang.tar.gz

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

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- 158.16 KBFEM_Lbeam.tar.gz

The example is taken from

Conference Paper 3D Linear Identification of Mechanical Joint Using FRF Decou...

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

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- 221.12 KBLinear6by6model_nw.tar.gz

The example is taken from

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- 956.01 KBprobst_all.tar.gz

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

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- 267.45 KBwollmann_flat_rotor.tar.gz

The example is taken from

Conference Paper Motion blur suppression by using an optical derotator for de...

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

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- 344.56 KBwollmann_60deg.tar.gz

The example is motivated by a recent request from Amr Saleh on RG

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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

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- 151.64 KBFEM_ABH_plate.tar.gz

The example is taken from

- Modal Timehistory
- Newmark method
- Initial conditions
- Free vibrations

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- 59.05 KBbekar.tar.gz

The example is taken from

- SIMP
- Contact analysis
- Friction
- Compliance
- Volume fraction

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- 344.19 KByongsheng_topo.zip

The example is taken from

- Inertia load case
- Static analysis
- Buckling Analysis
- Sampling

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- 380.85 KBtohya.tar.gz

The example is taken from

- 50 beam elements, i.e. BECOS
- viscous damping coefficient is varied
- Complex eigenvalues
- Sampling

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- 2.50 KBtisseur.zip

The example is taken from

- Optimization
- Compliance
- ITEM COOR MOD
- ITEM MODL NEWCOOR

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- 141.49 KByakov_opt.zip

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

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- 438.46 KBbrbrun_cfric_edu.tar.gz

The example (i.e. Case 1) is taken from

- Various boundary conditions
- Non-dimensional frequencies ($RESEXT FUNCTION)

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- 2.97 KBluo.zip

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.

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- 295.92 KBM16_preload_nw.zip

The example is taken from

- Modal analysis
- Sampling procedure
- Young's modulus and density are uncertain-but-bounded parameter

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- 18.08 KBping_pong_ball.tar.gz

The example is taken from

- Sampling
- Influence of spring stiffness on natural frequencies
- pyINTES

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- 56.04 KBmercier.tar.gz

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

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- 319.22 KBorion_edu.zip

The example is taken from

- Real eigenvalues (i.e. VIBRATION ANALYSIS )
- Complex eigenvalues (i.e. MODAL COMPLEX)
- Material damping
- Loss factor

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- 434.39 KBhongyun.tar.gz

- Linear temperature gradient in the radial and axial direction
- Library function
- 864 HEXE27 elements

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- 169.54 KBnafems_le11.tar.gz

- Thick plate
- Uniform pressure load (1MPa)
- Static analysis
- 5076 HEXE8 elements

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- 231.21 KBnafems_le10.tar.gz

The example is taken from

- Comparison of dynamic responses for different values of the large Mass M

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- 1.30 KBkim_01.tar.gz

The example is taken from