 PCGLSS Solver
- Extremely fast iterative solver capable of handling models over 25 million degrees of freedom on a 64-bit Windows PC
- Multi-mode solver using either an iterative (Preconditioned Conjugate Gradient) or direct solution technique
- The iterative solver mode requires less physical memory and disk storage than direct solver mode
- Automatically selects the most efficient mode of operation based on available resources
- Advanced preconditioner is optimized for all element types
- Available in all linear and nonlinear static solutions
- Supports multiple processors (parallel processing)
- Especially effective for large models comprised mainly of parabolic tetrahedron
elements (CTETRA)
- User controllable performance and accuracy
- Accuracy measure output
- Supported in all NEi Nastran solutions except direct transient and direct frequency response
- Windows, Linux, and Unix versions
PSS
Solver
- Extremely fast parallel direct solver capable of handling models over 15 million degrees of freedom in 64-bit
- Increased
efficiency and performance using supernode techniques with
update and pipelining parallelism
- Supernode
pivoting ensures numerical stability and scalability during
factorization
- Parallel
scalability is nearly independent of the shared-memory multiprocessing
architecture (performance increases of seven using eight processors
have been observed)
- Handles
non-positive definite matrixes
- Accuracy
measure output
- Supported
in all NEi Nastran solutions
VSS
Solver
- Based
on NASA Vector Sparse Solver technology
- Handles
a wide range of model sizes
- Uses
advanced reordering methods automatically selecting the most
efficient one
- Handles
non-positive definite and ill-conditioned matrixes
- Accuracy
measure output
- Supported
in all NEi Nastran
solutions
- Windows,
Linux, and Unix versions
Cargo Ship Linear Static Analysis: 10,963,000 DOF. Total Solution time: 42 minutes. Run on an Intel Core i7 2.8 GHz CPU with 8GB of RAM.
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VIS Solver
- Sparse iterative (Preconditioned Conjugate Gradient) solver
- Extremely robust
- Handles a wide range of model sizes
- Handles non-positive definite, ill-conditioned, and singular matrixes
- Accuracy measure output
- Supported in all NEi Nastran solutions
- Windows,
Linux, and Unix versions
Modal Frequency Response Analysis of an Automotive Frame: 3,163,596 DOF. Total Solution time: 1.8 hr. (75 modes) and 2.4 hr. (150 modes). Run on an Intel Core i7 2.8 GHz CPU with 8GB of RAM.
Lanczos
Eigensolver
- Block
Lanczos eigensolver capable of handling models over 4 million
degrees of freedom on a Pentium PC
- Multi-mode
eigensolver using either an iterative or direct solution technique
- Automatically
selects the most efficient mode of operation based on available
resources
- Advanced
preconditioner is optimized for all element types
- Available
in all modal response solutions including complex eigenvalue
analysis
- Supports
multiple processors (parallel processing)
- Iterative
mode is especially effective for large models comprised mainly
of parabolic tetrahedron elements (CTETRA)
- User controllable performance and accuracy
- Accuracy measure output (orthogonality loss and error measure)
- Windows, Linux, and Unix versions
Modal Transient Response Analysis of an Automotive Frame: 3,163,596 DOF. Total Solution time: 1.6 hr. (75 modes) and 2.3 hr. (150 modes). Run on an Intel Core i7 2.8 GHz CPU with 8GB of RAM.
Subspace Eigensolver
- Subspace eigensolver based on VSS
- Handles a wide range of model sizes
- Available in all modal response solutions including complex eigenvalue analysis
- User controllable performance and accuracy
- Accuracy measure output (orthogonality loss and error measure)
- Windows, Linux, and Unix versions
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