A d v a n c e d N o n l i n e a r a n d D e t a i l A n a l y s i s S y s t e m

Release Note Release Date : May, 2013 / Product Version : FEA 2013 (v1.1)

1-1. Improvement in data import from midas Civil and midas Gen

1-2. Improvement in ‘Frame to Solid’ and ‘Frame to Plate’ functions

1-3. Creating tendon profiles by entering 3D coordinates

1-4. Improvement in mesh quality of Hexa-Dominant Mesh

1. Pre Processing

Enhancements

2. Post Processing 2-1. Generating graphs from nonlinear static analysis results

2-2. Update geometry of analysis model using buckling mode shape

2 / 7

Enhancement midas FEA 1. Pre Processing

1-1. Improvement in data import from midas Civil and midas Gen

Data import using mct and mgt file Cross-sections data that are not supported in midas FEA are imported as user-type. Cable elements are imported as truss elements.

Previous version: Nodes and elements are only supported for the import from midas Civil or midas Gen. FEA 2013 (v1.1): Properties, boundary conditions, loads and analysis data are additionally supported.

File > Import > midas MxT

Civil

FEA

Civil

FEA

3 / 7

Enhancement midas FEA

1-2. Improvement in ‘Frame to Solid’ and ‘Frame to Plate’ functions

This function converts frame in midas Civil to solid / plate elements in midas FEA.

Previous version: Only one continuous straight line can be converted at a time. FEA 2013 (v1.1): More than one straight line can be converted at the same time.

Geometry > Frame -> Solid, Frame -> Plate

Frame model in Civil

Plate model In FEA

Frame model in Civil

Plate model In FEA

1. Pre Processing

4 / 7

Enhancement midas FEA

1-3. Creating tendon profiles by entering 3D coordinates

This new input method creates tendon profiles of spline or round type in the 3D space by entering 3D coordinates.

The curve types (Spline, Round) which are frequently used in the tendon modeling provides the user with the easier way to create tendon profiles than previous version.

Geometry > Curve > Create 3D > Tendon Profile

Spline or Round type

Tendon coordinates

Symmetric copy and rotation of tendon

for convenient tendon modeling

1. Pre Processing

5 / 7

Enhancement midas FEA

1-4. Improvement in mesh quality of Hexa-Dominant Mesh

The algorithm of generating hexa-dominant mesh is improved to create mesh with high quality.

Compared to the mesh consisting of tetrahedron only, hexa-dominant mesh in midas FEA provides more efficient and better analysis results using much smaller number of elements.

1. Pre Processing

Mesh > Auto Mesh > Solid(HEXD)

Tet mesh using Auto-Mesh Solid

Hybrid mesh using Auto-Mesh Solid (HEXD)

7568 nodes 19421 element s

3908 nodes : 52% compared to tet mesh 4907 element s: 25% compared to tet mesh

Hex.

Pyramid

Tet.

Trigonal Prism

Generation of hybrid mesh

Hexahedron

Pyramid

Tetrahedron

Pyramid is inserted to connect tetrahedron and hexahedron.

Hexahedrons are created around the boundary at which high stresses are expected. Tetrahedrons are locally created inside the structure.

6 / 7

Enhancement midas FEA

2-1. Generating graphs from nonlinear static analysis results

Generate graphs about the relationship of load & displacement and stress & strain for the nonlinear static analysis. It is possible to draw graphs using the results from different analysis cases.

This feature enables the user to generate graphs easily without the use of MS Excel.

Select node or element with a relevant component.

Post > Nonlinear Static Analysis > Nonlinear Static Result Graphs

Select a graph type.

2. Post Processing

7 / 7

Enhancement midas FEA 2. Post Processing

2-2. Update geometry of analysis model using buckling mode shape Create a new model file in which the geometry of analysis model is revised based on the mode shape of linear buckling analysis. The new model can be used for geometric and material nonlinear analysis to find a buckling load considering geometric imperfection.

Geometric imperfection can easily be included in the analysis model. The buckling behavior of the model can be further investigated by performing geometric and material nonlinear analysis.

Post > Linear Buckling Analysis > Update Model with Imperfections Select a buckling mode to revise the geometry of model.

Buckling mode shape

New analysis model in which nodal coordinates are updated based on the

selected buckling mode shape and scale factor.