Couple MotionSolve with OptiStruct
MotionSolve can interface with OptiStruct, a state-of-the-art optimization-enabled structural analysis tool.
OptiStruct is a proven, modern structural solver with comprehensive, accurate, and scalable solutions for linear and nonlinear analyses across statics and dynamics, vibrations, acoustics, fatigue, heat transfer, and multiphysics disciplines. It is used globally at industry-leading companies to drive design with optimization and validate structural performance. OptiStruct solves both linear and nonlinear problems using an enhanced proprietary version of Nastran and a modern, proprietary nonlinear formulation developed and maintained by Altair.
The Value of MotionSolve and OptiStruct Coupling
By coupling MotionSolve with OptiStruct, complex nonlinear finite element problems within a Multi-body Dynamics framework can be studied, such as large displacements, plastic deformation, buckling, and advanced contact. MotionSolve simulates the entire mechanical system, while OptiStruct simulates a subsystem consisting of one or multiple parts connected to the remaining system. There are no restrictions on modeling capabilities in MotionSolve or OptiStruct with respect to elements, materials, and so on.
With this coupling, you can introduce nonlinear elasticity of rubber and other hyperelastic materials, in addition to elastoplastic, gasket, viscoelastic, creep, and user-defined materials into a multi-body simulation. Friction in sliding contacts, frequency-dependent, and poro-elastic material properties are also supported. Furthermore, OptiStruct can solve both thermal and mechanical physics in a single simulation that allows engineers to understand how parts behave under real-world conditions whether they need quasi-static, transient, or contact-based thermal analysis.
Application Examples
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Implement Coupling
The coupling between MotionSolve and OptiStruct is achieved via a customized displacement-force (two-way) coupling that allows for a variable communication interval, with MotionSolve as the leading simulator and OptiStruct as the follower. Each solver can run either a transient or quasi-static analysis and both products run in parallel, each in their own process with an independent variable time step.
Interface nodes create connections between MotionSolve and OptiStruct. The connection type of an interface nodes is always a spherical joint, meaning only translational displacements and forces are communicated between the two solvers, but moments at an interface node are not transferred. Revolute, fixed, or other joints can be realized through combinations of interface nodes. Bushing elements are also supported.
Modeling Workflow
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Output
Both solvers generate results for their respective models that can be post-processed using HyperView and HyperGraph.
Limitations
Currently, MotionSolve can only couple with the implicit method of OptiStruct.