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Mesh Settings Window

Mesh Settings⚓︎

Thick Mesh⚓︎

Defines the number of finite elements for the thickness of the functional layer

  • Default = 3

Thick Mesh Anchor Extension⚓︎

Defines the number of elements for the anchor extrusion to the substrate surface

  • Default = 1

Element Size for Spring⚓︎

Defines the element size for meshing of springs in length direction

  • Default = 1 (Units of length, e.g. µm)

Width Mesh⚓︎

Defines the number of elements for the spring width

  • The value can be changed for individual springs by the SPRI command.
  • Default = 3

Spring Mesh⚓︎

Defines the maximum number of elements for the spring length

  • The value can be changed for individual springs by the SPRI command.
  • Default = 20

Element Size for Mass⚓︎

Defines the element size for meshing of seismic masses and anchors

  • Default = 1 µm (Units of length, e.g. µm)

Mass Mesh⚓︎

Defines the maximum number of elements size along boundary lines of mass bodies

  • Default = 100

Anchor Mesh⚓︎

Defines the maximum number of elements along boundary lines of anchors

  • Default = 100

Element Size for Comb⚓︎

Defines the element size for meshing of comb fingers in length

  • Default = 1 (Units of length, e.g. 1 µm)

Comb Width Mesh⚓︎

Defines the number of elements for the finger width of comb cells

  • Default = 1

Rounding Mesh⚓︎

Defines the number of elements for the corner fillet or chamfer mesh divisions

  • Default = 3

Element Size for Connection⚓︎

Defines the number of elements along straight lines of connecting volumes

  • Default = 3

Interface Mesh⚓︎

Defines the number of elements at the interface between springs and rigid bodies

  • The spring-RB-interface mesh division can only be set for models with corner chamfer or corner fillets. In all other cases, the Spring Width Mesh Divisions will be used for the interface to guarantee hexahedral elements in suspension springs.
  • Default = 3

Minimum Curve Mesh⚓︎

Defines the minimal number of elements at circular perforation patterns

  • Circular perforations are defined by 4 circular lines which span a 90 degrees arc.
  • The specified number of elements is applied to each 90° arc.
  • Default = 3

Further settings are specific to the ANSYS finite element model export:⚓︎

Defines the shape of the finite elements for spring connecting volumes

  • Either “Hexahedral/Quadrilateral”or “Tetrahedral/Triangular” finite elements can be selected.
  • Default = “Hexahedral/Quadrilateral”

Defines the shape of the finite elements for volumes of mass bodies

  • Either “Hexahedral/Quadrilateral”or “Tetrahedral/Triangular” finite elements can be selected.
  • Default = “Hexahedral/Quadrilateral”

Defines the shape of the finite elements for volumes of anchors

  • Either “Hexahedral/Quadrilateral”or “Tetrahedral/Triangular” finite elements can be selected.
  • Default = “Hexahedral/Quadrilateral”

  • Hexahedral finite elements for all structural items (default)

  • Hexahedral finite elements for springs and comb fingers
  • Prism shaped elements are used for connecting volumes, masses and anchors

Defines the size of internal finite elements compared to the size at boundary lines

  • Elements at the interior domain can either contract (factor is smaller than 1) or expand (factor is larger than 1) compared to the element size defined at boundary lines.
  • The command affects mass bodies and anchors.
  • Default = 1, 0.5 ≤ expansion factor ≤ 4.0

Defines how rapidly internal elements change their size compared to outer elements

  • A transition factor of 1 is the fastest transition and a factor of 4 changes the element size smoothly (see MOPT command in the ANSYS Users Guide).
  • The command affects mass bodies and anchors.
  • Default = 2, 1.0 ≤ transition factor ≤ 4.0

Defines the size of internal finite elements compared to the size at boundary lines

  • Elements at the interior domain can either contract (factor is smaller than 1) or expand (factor is larger than 1) compared to the element size defined at boundary lines.
  • The command affects connecting volumes of springs.
  • Default = 1, 0.5 ≤ expansion factor ≤ 4.0

Defines how rapidly internal elements change their size compared to outer elements

  • A transition factor of 1 is the fastest transition and a factor of 4 changes the element size smoothly (see MOPT command in the ANSYS Users Guide).
  • The command affects connecting volumes of springs.
  • Default = 2, 1.0 ≤ transition factor ≤ 4.0

  • Mesh expansion factor is set to 0.5 (size reduction).
  • Perforations are removed for demonstration.

  • Mesh expansion factor is set to 3 (size expansion).
  • Expansion is used to create a coarse mesh in larger mass bodies.

Further settings are specific for the COMSOL finite element model export:⚓︎

COMSOL Filename⚓︎

Defines the name and folder of the COMSOL output files

  • The Interface to COMSOL® creates three output files of the same name and the extensions /*.class, /*.java and /*.txt. The /*.class file can be opened in the COMSOL graphical user interface.
  • The files are stored in the MODELBUILDER working directory if no path to a named folder is specified. Extensions are automatically assigned to the file name.

Export Type: Mesh only [true] / Geometry [false]⚓︎

Activates mesh settings and build mesh commands

  • Default = true

Tolerance Relative⚓︎

Activate absolute and relative tolerance settings for combining areas to volumes

  • Tolerance settings in COMSOL are model specific. The COMSOL export windows assigns global settings. Data of individual items can be assigned to area and volumes in COMSOL.
  • Default = true, (relative tolerance)

Tolerance Value⚓︎

Default tolerance value for all COMSOL areas and volumes

  • Default = 1e-5, (relative tolerance)

Tolerance Union Relative⚓︎

Activate absolute and relative tolerance settings for combining volumes to a solid model

  • Tolerance settings in COMSOL are model specific. The COMSOL export windows assigns global settings. The “union” operation combines all volumes to a final solid model.
  • Default = true, (relative tolerance)

Tolerance Union Value⚓︎

Default tolerance value for the Union operation in COMSOL

  • Default = 1e-6, (relative tolerance)

Selection⚓︎

Activates assigned names for model items

  • Default = true

Material⚓︎

Activates assigned material properties

  • Default = true

Physics⚓︎

Activates mechanical and electrostatic domain settings

  • Default = true

Study⚓︎

Activates settings for a modal analysis

  • Default = true