Download and read HELP and User

Download and read HELP and User manual file for ELFEN

1. 点击下载文件(password: uutx)，双击打开文件(.exe)；

2. 获得个人电脑机器码（如下图）；

3. 将机器码发送邮件到wangyl@tsinghua.org.cn，获得文件阅读和使用密码。

Parallel computation of ELFEN

Summary of ELFEN Key Features for the User Interface

General Features

Versatile screen layout with user-friendly Graphical User Interface (GUI).
Use of icons, selection lists, buttons and sliders to control programs.
Easy to use view facility.
Single view of 2D, or rotated 3D objects.
Four view layout available, also showing elevations in X, Y or Z directions.
Dynamic rotation of geometry on screen in full 3D using the mouse.
Rotation angle selectable via slider or value, X, Y or Z elevations instantly selectable.
Reverse instantly selectable to view other side of object.
Full interactive zoom and resize facility.
Selection using lists or graphical display, single and multiple items or selection.
Save and recall selected views.
Component rotation from camera or object viewpoint.
View may be either Orthographic or Perspective.
On screen cursor speed control.
Hard copy.

Pre-Processor

Parametric geometry definition using tokens.
Point, line, arc, circle, and quadratic curves.
Geometry can be generated graphically or imported from a CAD system (including NURBS surfaces and tessellated surfaces).
CAD-style facilities such as copy, move, rotate and mirror.
Angular units can be degrees or radians.
Automatic surface and volume generation from wireframe.
Automatic generation of particulate geometry (2D disks and 3D spheres).
Automatic generation of pre-existing fractures (joint sets).
On-screen labelling of geometry entities.
Visibility toggling for geometric entities
ELFEN gem file format - may be used to import data from other systems.
Collections of geometric entities can be defined as objects for slideline contact, adaptivity and multi-stage analyses.
Local co-ordinate systems for beams and structural fixities.

Point loading.
Pressure/face loading with distribution defined across the domain.
Body forces and gravity.
Applied displacements, velocities, accelerations and temperatures.
Thermal loading for both transient and steady-state problems.
Fluid loads, e.g. pressure and velocity.
Seepage loads, e.g. prescribed pore pressure.
Initial stress and strain fields.
Point masses.
Multiple load cases.
Load functions for nonlinear and dynamic analyses, with facilities for importing and manipulating load curves.
Load relaxation for gradual deactivation of load

Initial Conditions

Constraints and Boundary Conditions

Contact

Materials Database

Mesh Generation

Structured mesh generation 2D or 3D, with triangular, quadrilateral, hexahedral and tetrahedral elements of 3, 4, 8, 9, and 20 nodes.
Structured mesh specification by equal, weighted or progressive divisions, with default.
Unstructured mesh generation 2D or 3D, with triangular, quadrilateral or tetrahedral elements with 3, 6, 4 and 10 nodes.
Unstructured mesh sizes applied to volume, surface, line/arc or point entities, in a hierarchical structure.
Delaunay and Advancing Front algorithms for unstructured meshing.
Density regions for initial mesh for unstructured meshing (independent of geometric items).
Adaptive remeshing on unstructured meshes in 2D and 3D, including mesh regions for localised mesh density control.
Range of error computation algorithms for controlling adaptive remeshing.
Mesh refinement.

Analysis

Single or multi-field analyses, using both Implicit and Explicit solution methods.
Field types include:

Mechanical - including linear elastic, nonlinear (material and geometric nonlinearity), dynamic relaxation, discrete and combined finite/discrete.

Thermal (and general quasi-harmonic field problems)

Fluid

Seepage

Internal and external coupling schemes for multi-field projects.
Range of Implicit solvers, with both incremental and arc-length schemes.
Output control, e.g., data echo, individual variable values, nodal values, integration point values.
Element options, e.g. integration rules, use of special strain interpolation algorithms.
Equation solution optimisers.
High resolution history graph plot definition.
Material grid definition.
Output filtering.
Multi-stage definition.
Adaptivity definition with specification of local regions of mesh refinement.
Mass scaling for explicit timestep control.

Visualisation

New module for results processing.
Uses binary output file for reduced size and increased efficiency.
Ability to load multiple result sets simultaneously.
Time selection by slider with real-time screen update, or selection of specific output from stack.
Mouse controlled zoom, pan and rotate of display in real time.
Shaded images with flexible lighting options, brightness and colour control.
Layer selection for layered shells and beams.
Domain items selected from list, with visibility toggling.
Mesh plotting styles: Wire frame, Solid, Profile, Edgeless.
Contour plots: Automatic or user defined contour bands, User-specified contour key style, Texture mapping
Display tools: Sectioning, Isosurfaces for contour plots, MRI, Reference grid display, Axis display, 揗ouse-over� information for on-screen description of nearest entity.
Vector plots: User-specified contour key style, Choice of line style, Scaling of vector size.
Graph plotting: Multiple nodes and/or time increments, Graphs along arbitrary section lines, Export of graph data in tabular form, High resolution history graph plotting.
Geometric manipulation facilities, e.g. mirror, copy.
Result combinations.
Animations in AVI format.