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.

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