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LMS Virtual.Lab Motion – Options
CAD Interfaces
- STEP AP 203 Interface (bi-directional export for STEP AP203 / AP214 data format files)
- IGES Interface (supports import and export of IGES 5.3 data)
- ProE Interface
- UG Interface
- I-DEAS Interface
- CATIA V4 Interface
- SolidEdge Interface
- SolidWorks Interface
- Autodesk Interface (allows users to import Acis/DXF3D and Inventor part files)
All CAD interfaces except the Autodesk Interface import assembly and part data.
Control & Hydraulics Interfaces
The Controls & Hydraulics Interfaces allow to perform time domain and linear analysis of fully non-linear LMS Virtual.Lab Motion mechanism models coupled to an external controls or hydraulics scheme. Depending on the interface, co-simulation and/or master-slave simulation are available as solver method.
Controls & Hydraulics
The Controls & Hydraulics option provides libraries of controls and hydraulics elements. The elements are directly defined on the mechanism model and solved by the LMS Virtual.Lab Motion Solver. Control elements allow measuring position, velocity, and acceleration values from the bodies and using that data to calculate new function values and apply those as controlling forces or displacements acting on the mechanism. Hydraulic elements complement the library of Control elements by providing elements specially designed to handle hydraulic systems. Hydraulic systems are characterized by fluid flow in pipes, valves, and hydraulic actuators.
Linearization & Eigenvectors
LMS Virtual.Lab Linear provides the user with the capability to linearize the non-linear equations of motion of a mechanism model. The resulting linear system can then be exported to control system design packages as state space matrices. The Eigenvector animation capability of LMS Virtual.Lab Linearization & Eigenvectors also allows the user to animate each of the mechanism linear modes. Visualization of eigenmodes and the values of eigenfrequencies give insight in the dynamic vibration behavior and the frequency content of a mechanism model.
CAD Contact
The CAD Contact option allows users to model and simulate non-permanent contact between bodies with arbitrary geometry. The contact area and penetration depth are computed based on exact Solid Modeling.
Swept Volume
Swept volume traces the envelope of motion by combining the geometric surface shape from the solid model, with the displacement from the multi-body dynamic solution process. These features provide a way to visualize the full space consumed when the system moves through its range of motion. The envelope surface can be exported in different geometric formats.
CATIA V5 Kinematics Transfer
This feature provides a very efficient way to transfer parts and joints into LMS Virtual.Lab Motion for dynamic simulations and easily use CATIA V5 Kinematics mechanisms in Virtual.Lab Motion. Once the mechanism is transferred, dynamic force producing elements such as tires, springs, and bushings can be added in Virtual.Lab Motion. You can then extend the kinematics analysis capabilities of CATIA V5 Kinematics with the dynamic, inverse dynamic, and static analyses of Virtual.Lab Motion.
Cable Modeling
This module is used to represent cable dynamics acting between pulleys. Users can model the cable manually in Virtual.Lab using multiple bodies along a cable segment, including nonlinear stiffness and damping between segments, and defining contact elements between each segment body and each cable. This special cable element will replace this discrete approach using many bodies and force elements with a single equation defining the force acting between pulleys. The mathematical function is a differential equation that characterizes the force and dynamic tension between pulley tangents, but ignores the transverse span vibration as a simplification.
MSC.ADAMS to LMS Virtual.Lab Motion Convertor
The MSC.ADAMS to LMS Virtual.Lab Motion Convertor imports *.adm format files. Dynamic motion data such as body mass, inertia, center of gravity, joint location, force location, stiffness, and damping are read and converted to LMS Virtual.Lab Motion models. The list of supported modeling elements includes PART, MARKER, JOINT, SFORCE, GFORCE, etc. Any unsupported elements are ignored and reported as not being used in the resulting LMS Virtual.Lab Motion model.
Flexible Bodies
Flexible Bodies provide a very efficient way to represent structural flexibility for even the most complicated geometry. The method is based on an advanced numerical algorithm using “modes” – based on either FEA or test measurements. The flexible behavior for any number of parts in the simulation can be represented and visualized by graphing and animating the results. The collection of flexible body modes for each part are used to define the total deformed shape, velocity and acceleration. The resulting mode amplitudes can be used to define time varying stress, durability fatigue life, and even acoustic radiation from the surface of the parts.
Stress Recovery
This functionality allows to visualize the stress field of a part undergoing dynamic motion. When using the dynamic solver, the resulting stresses are the dynamic stresses that take all vibrations and transients into account. You can animate the flexible body in the mechanism with color contours of stress and graph stress values at specific nodes for each time step. A summary plot of the highest stress that occurred during the entire mechanism motion shows the critical stress hotspots.
Automatic Substructuring
Automatic Substructuring is an extension to the Flexible Bodies option that substructures a flexible body to improve modeling of nonlinear geometric deformations. The component mode synthesis approach used in LMS Virtual.Lab Motion flexible body analysis assumes small, linear elastic deformations. However, some combinations of material and geometric properties may lead to deformations that exceed the linear assumption. An economical approach to modeling this non-linear behavior is to subdivide the flexible body into several linear components. Components are then coupled together using bracket joints in the dynamics analysis. The equations solved in the dynamics equation represent the non-linear deformation of the system.
Component Structural Analysis
Component Structural Analysis is the finite element mesher and solver embedded in the LMS Virtual.Lab framework. The solver supports frequency and/or static linear elastic finite-element (FE) analysis of parts to provide modal data for motion, durability, noise, vibration and handling modeling. It includes a rich set of boundary conditions, automatic meshing, and a fast FE solution to produce deformation, stress and strain data.
Ventil Interface
The Ventil Interface converts Ventil kinematic valve train models to dynamic LMS Virtual.Lab Motion models using the same parametric layout as the Ventil model. From this Motion model, dynamic results are obtained and converted back to a format that Ventil can read, so that the results can be directly compared to the Ventil kinematic analysis.
Shock Absorber
This option defines a shock absorber damper force element between two rigid or flexible bodies. A shock absorber element is used to simulate the nonlinear dynamic behavior of the automotive shock absorber (damper). The model formulation is based on the Monroe double-tube shock absorber model (Reybrouck and Duym) intended for low and medium frequencies (up to 30 Hz).
Standard Tire (Includes Standard Tire Interface)
The LMS Virtual.Lab Motion Tire element computes lateral force, normal or vertical force, and longitudinal force components of force generated by a pneumatic tire in contact with a road surface. Several different tire models allow you to control the requisite level of detail. Simple and Complex 2D tire models are available. The Standard Tire Interface (STI) provides an interface for user-defined tire models, consistent with the Standard Tire Interface adopted by the TYDEX Working Group on Tire Modeling and Description. Finally, the Magic Formula Tire utilizes the magic formula tire force formulation developed by Hans Pacejka.
Aero-dynamics Element
The Aerodynamic Force element applies aerodynamic forces and torques based upon a classic aircraft dynamics and control formulation. Angle of attack and sideslip angle are calculated, along with airspeed. Non-dimensional coefficients and characteristic lengths and areas are defined to generate forces and torques on the associated body. Control surface deflections may be defined, which have their own associated coefficients.
Motion Batch Solver (Single/4/8/16 Solution)
The batch solver provides a way to run analysis simulations, using existing model input files created by LMS Virtual.Lab Motion, without occupying the user interface during the solution process. Multi-license bundles can be purchased to enable several copies of the solver to run simultaneously. The progress of submitted batch jobs can be monitored.
Design Sensitivity Analysis
Design Sensitivity Analysis computes how a given metric or cost function is changed by the perturbation of one or more inputs or design variables. The Design Sensitivity Analysis is computed directly by the Motion solver during one simulation run with a Direct Differentiation Method, where the classical Forward Difference Method Design needs a separate simulation run for each input variable to compute the gradients. The Design Sensitivity Analysis yields important time savings in sensitivity and optimization studies.
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 Download the LMS Virtual.Lab Motion Brochure
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