Overview

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AxFEM

Project Description

AxFEM is an FEM application for axisymmetric vibrating structure gyroscope simulations. It is implemented in deal.ii and provides a scripting interface by extending Lua.

Features

For a given azimuthal number, AxFEM can compute:

  • Eigenfrequencies
  • Bryan''s factor
  • Quality factor due to thermoelastic damping
  • Sensitivities of the quantities above to geometric design parameters

Installation and Running

There are two alternatives to run the software:

Virtual Machine

  1. Download and install VirtualBox (or use other Virtual Machine (VM) platform which can run .vmx files, such as VMWare Player or Parallels).

  2. Download the zipped VM image and extract the files.

  3. Setting up the VM

The VM image is based on TurnKey Linux Core, a relatively lightweight system optimized for running on virtual machine platforms like VMWare and VirtualBox. If the following instructions do not work, there is a tutorial on installing appliances with VirtualBox that may be helpful. But ideally, you should be able to simply do the following steps:

  1. Run VirtualBox
  2. Click New to add the VM
  3. Give a name to the VM (e.g. AxFEM)
  4. Select operating system Linux
  5. Select version Other Linux
  6. Use at least 512MB (more is better) of memory.
  7. Make sure Start-up Disk is selected.
  8. Choose Use existing hard disk and select AxFEM vmdk file
  9. Start the VM, use username user and password user to log in

If you want to administer the virtual machine, the root password is turnkey.

  1. The tutorials are located within the VM in the folder /usr/local/axfem/doc/tutorials Alternately, they are available online.

Compile AxFEM

  1. You can download the source code from the BitBucket page in zip, gz or bz2 formats, or using Git:

    git clone https://bitbucket.org/dbindel/axfem.git

  2. Download and compile deal.ii

  3. Download and compile deal.ii (>=7.1.0)
  4. Configure with the following options:

    ./configure --disable-threads --without-petsc --without-slepc \ --with-blas --with-lapack --with-umfpack`

  5. Then type make all

  6. In axfem folder, you need to update the folder names in Makefile.in.ex and save it as Makefile.in. Then type make and make test.