Evaluation of the SPAR thermal analyzer on the CYBER203 computer
Abstract
The use of the CYBER 203 vector computer for thermal analysis is investigated. Strengths of the CYBER 203 include the ability to perform, in vector mode using a 64 bit word, 50 million floating point operations per second (MFLOPS) for addition and subtraction, 25 MFLOPS for multiplication and 12.5 MFLOPS for division. The speed of scalar operation is comparable to that of a CDC 7600 and is some 2 to 3 times faster than Langley's CYBER 175s. The CYBER 203 has 1,048,576 64bit words of real memory with an 80 nanosecond (nsec) access time. Memory is bit addressable and provides single error correction, double error detection (SECDED) capability. The virtual memory capability handles data in either 512 or 65,536 word pages. The machine has 256 registers with a 40 nsec access time. The weaknesses of the CYBER 203 include the amount of vector operation overhead and some data storage limitations. In vector operations there is a considerable amount of time before a single result is produced so that vector calculation speed is slower than scalar operation for short vectors.
 Publication:

Computational Aspects of Heat Transfer in Structures
 Pub Date:
 1982
 Bibcode:
 1982caht.nasa..405R
 Keywords:

 Cdc Cyber 203 Computer;
 Computer Programs;
 Format;
 Heat Transfer;
 Plotting;
 Scalars;
 Spacecraft Structures;
 Structural Analysis;
 Vector Analysis;
 Cdc Cyber 175 Computer;
 Computer Storage Devices;
 Finite Element Method;
 Space Shuttles;
 Thermal Protection;
 Fluid Mechanics and Heat Transfer