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Trident FEA is an industry leading
advanced finite element analysis software package
for naval architecture and marine engineering applications.
Visualization
- Produces wire mesh, fill hide and hidden line
removal plots from any view and/or perspective.
- Provides colour display based on specified verification
parameters.
- Produces plots generated of the entire model or
portion. Model can be viewed by erase/restore based
on module, element type, material, property, number,
value, attached elements, cursor identify, coordinate
location, external/internal, structure/fluid, global/local
- Provides capability for interactive data query
of input and result data
- Produces tables of detailed model input and result
data
- Creates colour contour plots of pressures, element
attributes, displacements and stresses
- Creates vector plots to verify loads and normals
- Generates XY plots of input and analysis result
data
- Creates animation files in AVI format for display
of deformations and mode shapes
- Provides superposition capability to plot stresses
on deformed model and to impose deformed model over
original
Primitive Geometry
- Create points, lines, arcs, surfaces, solids
and intersections
- Import CAD geometry in IGES format (DXF and Step
format under development)
- Various entity generation techniques
- Module definition
Mesh generation and refinement
- Mesh generation using different meshing algorithms
including parametric and unstructured mesh generation
- Direct generation of individual element
- Special templates for meshing 3D beams, stiffened
and corrugated panels, plate intersections and penetrations,
and tubular joints
- Global and local controls with default sizing
- Mesh density control feature
- Define element size or spacing with bias
- Element conversion (Higher-lower order element
and 2D-3D) capability
- Capability to create fluid elements by converting
structural elements
- Top-down analysis capability
- Mesh refinement (element and special templates)
- Capability to translate, rotate and mirror image
model (Append or retrain base model)
- Capability to create models of ship structures
using the Ship Modeler resource to build modules
from structural components (panels, strakes, girders),
import CAD line entities, and automatically mesh
and assemble modules
Element Types
- Rod, spring and beam elements
- Plate and shell: quad and triangle elements
- Membrane: quad, triangle and stiffened elements
- Solid: tetra, wedge and brick elements
- Axisymmetric: solid, shell and beam elements
- Transition elements
- Shear web elements
- Fracture elements
- Fluid elements
Property Library
- Plate
- Cross Section
- Material:
- Isotropic, orthotropic
- Elastic-plastic with isotropic and
kinematic hardening and multilinear
stress-strain curve
- Fracture
- Thermal
- Formulations:
- Hyper-elastic
- Frequency-dependent
- Complex Stiffness
Loads, Boundary Conditions
and Lumped Masses
- Concentrated and pressure loads
- Hydrostatic pressure loads
- Sectional forces
- Self weight
- Inertia loads
- Load combinations
- Prescribed displacements, velocities, and accelerations
- Time or frequency dependent loads
- Out-of-phase time dependent loads
- Support Motions
- Follower forces
- Multi-point constraints
- Fixed and flexible translation and rotational
constraints
- Temperature
Application Interfaces
- External FE Model data translation (import/export)
capability: (Ansys, Dyna3D, Nastran, Patran, Marc,
Abaqus, Sesam, Adina)
- Hypermesh: Model data translation (import/export)
- CAD: Geometric data translation using CAD data
standards for IGES (DXF and Step format under development)
- Heat transfer analysis: Solves steady state temperature
and heat flux conditions due to convection, conduction
and radiation. Uses Trident Heat Transfer Solver
VASTF (Field solver)
- Seakeeping: Hydrodynamics loads via integrated
interface. Uses FD and TD WaveLoad solver. (Time
Domain and Frequency Domain)
- Fatigue I: Basic fatigue analysis capability using
Miners Sums and Fatigue Diagrams methods
- Fatigue II: Simulation of crack initiation and
propagation under deterministic (constant amplitude)
and spectral loads. Uses Trident LIFE3D program.
(Linear Incremental fatigue evaluation system for
3 dimensional models)
Graphical Model Verification
- Colour display
- Integrity tests: Aspect ratio test,
Minimum and maximum corner angles
verification, Common boundaries,
Element warping, Node and element
duplication tests, Minimum element
side length test, Plate element
thickness to side length ratio
test
- Element attributes: formulations,
properties
- Vector Display
- Element normals
- Boundary conditions: Free, Fixed,
Flexible, Prescribed
- Mass: element and lumped masses
- Load cases: Element and concentrated
loads, translational
accelerations, angular velocities,
angular accelerations and
centre-of-rotation
- XY plots
- Time function
- Frequency function
- Tabular Reports
- Summary: Dimensions, Nodes and elements,
Loads, Boundary
conditions, Masses, Skew Coordinates,
Formulation, Function,
Primitives, Properties, Crack
Lines and Tips, and Fluid mass
- Loads global summary
Results Display
- Color-filled and color line contour, vector,
and X-Y plots of Stress, Strain, Displacements,
Vibration and Buckling modes
- Animation
- Superposition
Solution methods
- Direct:
- Sparse matrix and skyline-based
- Eigensolvers:
- Direct and subspace iteration
Analysis modules
- Linear static analysis
- Produces displacements, strains, stresses,
forces, and error estimates
as results of the analysis under
a variety of loading conditions
- Natural frequency analysis
- Provides several eigenvalue analysis
techniques to evaluate natural
frequencies and their corresponding
mode shapes. Both in-air and fluid
modes can be calculated (latter
requires a fluid mass representation)
- Buckling analysis
- Predict the loads at which the onset
of structural instability will occur
through eigenvalue analysis
- Dynamic analysis
- Performs dynamic response analysis
due to time history loading,
response spectra input, steady
state harmonic input, and random
vibration excitations
- Complex eigenvalue
- Complex natural frequencies are calculated
for system with complex
stiffness characteristics
- Nonlinear analysis
- Performs nonlinear static and dynamic
analysis, including large
displacements, plasticity, hyper
elasticity, and post buckling analyses
- Thermal stress analysis
- Predicts thermal-induced linear elastic
stress and deformations
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