CAESAR II Operational Features

Menu/Spreadsheet Interface

The menus are setup to present the available program options in a logical order, when they are needed. Menus govern the overall flow of control throughout the program. 

The input spreadsheets provide concise prompts for input data. The piping spreadsheet duplicates "elemental" data values forward to succeeding elements as the user defines them. When appropriate, data bases can be accessed to obtain values for valves, flanges, and expansion joints. If desired, an expansion joint modeler can be invoked to build the necessary spreadsheets (with the appropriate tie-bar connections) to accurately simulate a variety of expansion joint styles. 


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CAESAR II does not enforce artificial coding rules on the user during model construction. Models can be started anywhere and can continue in any direction from tees or anchors. 

The user interface in the input allows you to decide what data you want to see, by allowing you to "tear-off" parts of the input to work primarily, or completely in the graphical environment.

The unique List Processor provides a concise method to review specific data sets, for example all the bends in the model. The fields in the List Processor tables are active, allowing user modification of the data. This processor also enables groups of elements to be "blocked", with further manipulation of the data in the block. Blocks can be rotated, duplicated, renumbered or deleted as necessary.

This same block editing can be done graphically, to duplicate, rotate, delete or renumber nodes in a collection of elements.  

Over 60 restraint types provide the most comprehensive library of boundary conditions available to the pipe stress analyst today. Support types include all of the expected linear and non-linear directional restraints, as well as bottomed out spring hangers, large rotation rods, and bi-linear translational and bi-linear rotational restraints. 

The Buried Pipe Modeler allows rapid creation of complex soil models. By simply specifying the soil characteristics, and which portions of a system are buried, CAESAR II can re-mesh the model, computing the soil restraint locations, directions, and stiffnesses as necessary. 

Through the use of 32 bit compilers, the upper limit on model size is restricted solely by the amount of free upper RAM.  The limits on model size are reported in the input processor, to inform the user during model construction. 

Context Sensitive Help
Pressing the ? or [F1]-Help key with the cursor on any field provides very specific information for that particular input cell or menu selection. The help text details exactly what is expected, why, and when appropriate the code reference. When necessary, the help text shows the expected units for the current data cell. 

Help screen

The same help engine is used to provide program diagnostics in the event of system or program failures. Diagnostic messages are available for computational as well as system abnormalities.  

Interactive Graphics 
The CAESAR II graphics modules are designed to provide an alternate method of interrogating the input and output data. The input graphics module reduces most input modeling mistakes by permitting the display of the major elemental data. Node numbers, restraints, spring hangers, nozzles, tees, bends, expansion joints, and rigid elements call all be shown graphically. Numeric data such as element lengths, temperatures, and pressures can also be displayed. 


The interactive rotate, pan, and zoom features of the input module are controlled directly from the cursor pad. A "high light" option is available to selectively plot any portion of the model matching a particular search criteria, such as "all the  pipe of a certain temperature". This can be very helpful when reviewing a model for accuracy.  

The output graphics include standard options such as displaced shapes and colored stress plots. Additionally, the output graphics can show the direction of restraint action, and the individual details (displacements, forces, and stresses) on each element in the model as the cursor is moved through the model. 

Integrated Error Checking 
The CAESAR II program includes an integrated error checker, which is automatically run following the completion of the input specification. This error checker analyzes the user specified input and checks it for consistency from both a "finite element" and "piping" point of view. Two types of messages are generated by this error checker, warnings and fatal errors. Warning messages are conditions which may be errors, but are numerically accep table. For example, warning messages are generated when a change in direction is encountered, without a bend or tee being specified. Fatal error messages are generated when the specified input data is inconsistent or illogical, for example if the corrosion allowance is larger then the corresponding wall thickness. 

Jobs can be analyzed with warning messages, but not with fatal error messages. 

Interactive Report Review 
Once a job has been analyzed, the solution results are available for review at any time. The review module is interactive, allowing the selective review of individual output reports for individual load cases. Reports can be generated in any units 
system simply by altering the configuration. Reports can be viewed on the monitor, or sent to a printer or to a disk file. 

Data Bases 
The CAESAR II program incorporates many data bases to reduce the time the analyst spends looking for numeric values associated with piping components. CAESAR II currently provides the following data bases: 

Pipe Size Specifications: 

ANSI - American National Standard 
DIN - German Standard 
JIS - Japanese Standard

Valve & Flange Data Bases: 

Crane  - The Crane valve & flange data 
Generic - A mixed data base from several vendors 
NoFlange - Face to face, valves only with no flange length

Spring Hanger Tables:
There are many spring hanger tables from around the world available. These allow CAESAR to select a spring hanger model number from a catalog after it designs the hanger.  These tables are: 

The following spring tables are currently included in CAESAR II:

1. Anvil

2. Bergen Power

3. Power Piping

4. NPS Industries

5. Lisega

6. Fronek

7. Piping Technology

8. Capitol

9. Piping Services

10. Basic Engineers

11. Inoflex

12. E. Myatt


14. BHEL

15. Flexider

16. Carpenter & Paterson

17. Pipe Supports Ltd.

18. Witzenmann

19. Sarathi

20. Myricks

21. China Power

22. Pipe Supports USA

23. Quality Pipe Supports

24. PiHASA

25. Binder

26. Gradior

27. NHK


11 Expansion Joint Catalogs are build in, including:

Pathway Bellows  (US) 
Senior Flexonics (US) 
IWK (Germany)

Structural Library
For structural modeling, CAESAR II includes a number of libraries of structural shapes. These libraries contain the necessary parameters required to build the element stiffness matrix as well as dimensioning and detailing data. The libraries installed with CAESAR II include: AISC 1977, AISC 1989, German 1989, Australian 1990, South African 1991, Korean 1990. 

Graphics Display of Solution Data
Once the solution data is available it can alternatively be reviewed in a graphical format. This presentation shows how the system responds to a particular set of loads by plotting the system in its deformed position. These plots can also include 
restraint, force and stress data. These graphics results can be shown on the terminal screen, sent to a printer, or saved in PCX format for incorporation into desktop publishing documents. 
When reviewing dynamic results, the response of the model can be animated to illustrate the motion of the system. 

Custom Program Configuration
The CAESAR II program can be customized to suit individual taste or project requirements. This customization can be controlled on a directory by directory basis, accommodating different users or different client needs. 

The customization options are grouped into categories, such as: Text Screen Colors, Display & Printer, Computation Controls, SIFs & Stresses, and Data Bases. In each category, the options are listed with their current setting. Typically, the setting of a particular option can be changed by toggling through a list valid settings. Each option is backed up by on-line help, further defining the purpose of the option and the available settings. 

Interfaces to Other Programs
CAESAR II provides interfaces to most major CAD packages and several analytical packages. These interfaces are listed below. 

CAD Interfaces:
CADWorx Plant - See a detailed description of the best CAD-Stress interface on the planet.
AutoCAD - A DXF file can be generated by CAESAR II and exported. 
Autoplant - Neutral file can be imported into CAESAR II. 
Cadcentre - Neutral file can be imported into CAESAR II. 
ComputerVision - Neutral file can be imported into CAESAR II. 
Intergraph - Neutral file can be imported into CAESAR II. 
Isomet - Neutral file can be imported into CAESAR II. 
PRO-ISO - Neutral file can be imported into CAESAR II. 

The best CAD interface is CADWorx Plant, an AutoCAD based drafting design package developed by COADE. This package overcomes many of the difficulties found in other similar packages plus it provides a complete bi-directional data link to CAESAR II. This data link passes both model data and analysis results data, permitting effortless generation of stress isometrics. Details on the design and capabilities of this package can be found in the CADWorx Plant white papers on this WEB site. Click here to go to the CADWorx Plant Page

Analytical Interfaces: 
LIQT - A data file of dynamic pipe forces can be imported. 
PIPENET - A data file of dynamic pipe forces can be imported.
AFT Impulse - Force-time data files generated by AFT Impulse transient analysis software can be imported for use in spectral or time-history analysis.

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