Loading...
Please wait, while we are loading the content...
Similar Documents
Massively parallel and scalable implicit time integration algorithms for structural dynamics
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Farhat, Charbel |
| Copyright Year | 1997 |
| Description | Explicit codes are often used to simulate the nonlinear dynamics of large-scale structural systems, even for low frequency response, because the storage and CPU requirements entailed by the repeated factorizations traditionally found in implicit codes rapidly overwhelm the available computing resources. With the advent of parallel processing, this trend is accelerating because of the following additional facts: (a) explicit schemes are easier to parallelize than implicit ones, and (b) explicit schemes induce short range interprocessor communications that are relatively inexpensive, while the factorization methods used in most implicit schemes induce long range interprocessor communications that often ruin the sought-after speed-up. However, the time step restriction imposed by the Courant stability condition on all explicit schemes cannot yet be offset by the speed of the currently available parallel hardware. Therefore, it is essential to develop efficient alternatives to direct methods that are also amenable to massively parallel processing because implicit codes using unconditionally stable time-integration algorithms are computationally more efficient when simulating the low-frequency dynamics of aerospace structures. |
| File Size | 382771 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19970027392 |
| Archival Resource Key | ark:/13960/t1hj1fz4g |
| Language | English |
| Publisher Date | 1997-04-01 |
| Access Restriction | Open |
| Subject Keyword | Computer Programming And Software Dynamic Response Dynamic Structural Analysis Measure and Integration Stability Interprocessor Communication Low Cost Nonlinearity Massively Parallel Processors Frequency Response Factorization Aircraft Structures Parallel Processing Computers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
