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New structural design services form IBM
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System for design of heat exchangers
A computer-based design automation system known as HECATE has been developed by Wbessoe for the engineering of shell and tube heat exchangers. HECATE integrates mechanical design and the down-stream functions of estimating, drafting and production of paper work for manufacturing, purchasing and despatching responsibilities. It produces, from an input comprising specifications of the process conditions, a mechanical design followed by an estimate of material and direct labour costs. If required H E C A T E will also produce a general arrangement drawing. This is produced on a 30in drum plotter. The
drawing is produced to scale and shows sectional and frontal elevations with all relevant dimensions. Information relating to material properties data for those materials which have been specified for the various components which make up the final unit can be obtained automatically by the system from data files which hold information on approximately 2000 American and British materials specifications. H E C A T E is described in detail in a paper which was presented on 14 December last year at the Institution of Mechanical Engineers.
New
IBM Data Centre Services has announced two new program packages, CALL/360 STRESS and a new version of S T R U D L 1I. These products form part of a range of services for engineers offered by the engineering branch of IBM Data Centre Services. CALL/360 STRESS provides the capability of designing frame structures on a conversational basis, while S T R U D L II provides a complementary service in dealing with the sophisticated analysis of larger and more complex structures. STRESS is an IBM system already in use which has been redesigned to exploit the conversational capabilities of the CALL/360 service, IBM's generalized time sharing service. CALL/360 STRESS provides all the usual facilities of a frame analysis program together with the ability to:
and loads is prepared in a free format using terms familiar to the engineer. This input can be modified in any way by using a simple set of commands. Once a solution has been obtained the engineer can print at his terminal the displacements or stresses in the parts of the structure he expects to be critical. Both the description of the structure and the results of the analysis are stored by the central computer. Thus the engineer can at any time gain access to the structure description for examining further designs, or access the results of any analysis for further processing depending on the specific requiremerits of the design. S T R U D L II, the structural design language, was originally developed at the Massachusetts Institute of Technology. S T R U D L II contains all the features of STRESS together with the ability to analyse much larger structures, using finite element techniques, dynamic analysis, and non-linear analysis, in addition to the usual stiffness analysis of frame structures. S T R U D L II can be used either on an over the counter basis, or can be accessed from the same IBM 2741 terminal as is used for CALL/360. The methods of defining the structure and data input are very similar to those used by CALL/360 STRESS, enabling the two services to be used in conjunction with each other. Both of these services are backed by technical support in both engineering and data processing. 1BM Data Centre Services, 28 Tile Quadrant, Richmond, Surrey. Tel: 01-940 9545.
structural design services from IBM
1. Perform an analysis in a matter of seconds - f o r example, about 25 seconds of computer time for a 40 member plane structure. 2. Select critical parts of the structure, for which the results of the analysis are to be printed at the terminal. 3. Modify the original structure slightly, to experiment with an alternative design. These features enable the engineer to examine many possible solutions and assist him to calculate a near optimum solution. Cost is usually less than £4 for a 40 member plane structure. The input data describing the structure 98
COMPUTER AIDED DESIGN
R E
System for design of heat exchangers
A computer-based design automation system known as HECATE has been developed by Wbessoe for the engineering of shell and tube heat exchangers. HECATE integrates mechanical design and the down-stream functions of estimating, drafting and production of paper work for manufacturing, purchasing and despatching responsibilities. It produces, from an input comprising specifications of the process conditions, a mechanical design followed by an estimate of material and direct labour costs. If required H E C A T E will also produce a general arrangement drawing. This is produced on a 30in drum plotter. The
drawing is produced to scale and shows sectional and frontal elevations with all relevant dimensions. Information relating to material properties data for those materials which have been specified for the various components which make up the final unit can be obtained automatically by the system from data files which hold information on approximately 2000 American and British materials specifications. H E C A T E is described in detail in a paper which was presented on 14 December last year at the Institution of Mechanical Engineers.
New
IBM Data Centre Services has announced two new program packages, CALL/360 STRESS and a new version of S T R U D L 1I. These products form part of a range of services for engineers offered by the engineering branch of IBM Data Centre Services. CALL/360 STRESS provides the capability of designing frame structures on a conversational basis, while S T R U D L II provides a complementary service in dealing with the sophisticated analysis of larger and more complex structures. STRESS is an IBM system already in use which has been redesigned to exploit the conversational capabilities of the CALL/360 service, IBM's generalized time sharing service. CALL/360 STRESS provides all the usual facilities of a frame analysis program together with the ability to:
and loads is prepared in a free format using terms familiar to the engineer. This input can be modified in any way by using a simple set of commands. Once a solution has been obtained the engineer can print at his terminal the displacements or stresses in the parts of the structure he expects to be critical. Both the description of the structure and the results of the analysis are stored by the central computer. Thus the engineer can at any time gain access to the structure description for examining further designs, or access the results of any analysis for further processing depending on the specific requiremerits of the design. S T R U D L II, the structural design language, was originally developed at the Massachusetts Institute of Technology. S T R U D L II contains all the features of STRESS together with the ability to analyse much larger structures, using finite element techniques, dynamic analysis, and non-linear analysis, in addition to the usual stiffness analysis of frame structures. S T R U D L II can be used either on an over the counter basis, or can be accessed from the same IBM 2741 terminal as is used for CALL/360. The methods of defining the structure and data input are very similar to those used by CALL/360 STRESS, enabling the two services to be used in conjunction with each other. Both of these services are backed by technical support in both engineering and data processing. 1BM Data Centre Services, 28 Tile Quadrant, Richmond, Surrey. Tel: 01-940 9545.
structural design services from IBM
1. Perform an analysis in a matter of seconds - f o r example, about 25 seconds of computer time for a 40 member plane structure. 2. Select critical parts of the structure, for which the results of the analysis are to be printed at the terminal. 3. Modify the original structure slightly, to experiment with an alternative design. These features enable the engineer to examine many possible solutions and assist him to calculate a near optimum solution. Cost is usually less than £4 for a 40 member plane structure. The input data describing the structure 98
COMPUTER AIDED DESIGN