Analysis, design, and results-recovery times are dependent upon the following hardware characteristics:
- Available memory
- Input/output (I/O)
- Processor speed
- Number of cores
Depending on the type of analysis, some hardware characteristics may have greater impact on analysis and results-recovery speed than others.
Hardware requirements for analysis types
This table approximates the hardware demand for various analysis types. I/O intensive analyses tend to benefit from both increased disk speed and additional RAM. Fast SSDs directly connected to the PCI bus (PCIe) are recommended over regular hard drives connected to a SATA interface or slower SSDs. External hard drives are not recommended, and network drives should not be used. The operating system uses RAM for file caching. The most cost-effective approach to improving software performance is to increase the amount of RAM on 64-bit operating systems, and to run analysis out-of-process.
Analysis Type | RAM Memory Demands | I/0 (Disk Access) Demands | Processor Demands |
|---|---|---|---|
Linear static | Moderate | Moderate | Moderate/Multi-core |
Nonlinear static | Moderate | Moderate | Moderate/Multi-core |
Modal (Eigen/Ritz/Buckling) | Moderate | High | Moderate/Multi-core |
Linear modal time-history | Low | Low | High |
Nonlinear modal time-history | Low | Low | High/Multi-core(1) |
Linear direct-integration time-history | Moderate | High | Moderate/Multi-core |
Nonlinear direct-integration time-history | Moderate | High | Moderate/Multi-core |
Influence-based moving-load | Moderate | Moderate | High/Multi-core |
Step-by-step moving-load | High | Moderate | Moderate/Multi-core |
Steady-state | High | Moderate | High |
Power-spectral-density | High | Moderate | High |
Running design | Low | Moderate | High |
Processing section cuts | Low | High | Low |
Comments:
(1) Nonlinear modal time history is parallelized for state determination and results recovery.
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See Also
- Solver section
- Parallel processing article