CAESAR II Analysis Features

CAESAR II incorporates a robust static solver, employing both the Choleski or LDLT methods as appropriate. The static solvers are designed to iterate to a converged solution, modifying the global stiffness matrix as the status of non-linear restraints change. Once the static displacement solution is available, element forces and moments are computed, followed by the element stress computation according to any of the 35 built in piping codes. 

In addition to the standard boundary conditions (restraints and displacements), the user may specify either WRC-297 or PD5500 vessel nozzles or API-650 tank nozzles. The flexibilities of these nozzles are computed according the respective document, and inserted into the model at the referenced node point.  If you have your own calculated flexibilities, you can specify all six degrees of freedom at any point in the system.

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Structural steel models can be incorporated into the piping models, or solved as stand alone models. Buried pipe and jacketed pipe models can be analyzed also, just as easily. 

The dynamics solutions include natural frequencies, harmonics, earthquake spectra, force spectra, and time history. Once the dynamic solution has been obtained, the animation module can be used to show the natural modes of vibration, the harmonic response, or the motion in the time domain. 

Auxiliary modules are provided to determine the acceptability of the piping forces and moments on the boundary elements of the model. The Equipment module includes checks for NEMA-SM23, API-610, API-661, API-560, and the HEI Standard. WRC-107 and WRC-297 modules are provided for stress checks on vessel nozzles. Other modules allow checking for ASME Section VIII, Division 1, Appendix 2 flanges, expansion joint rating, B31G pipelines, and AISC structural unity checks. 

CAESAR II performs stress computations on pipe elements according to various piping codes. Currently the piping codes incorporated into CAESAR II include: 

Seismic Wizard
CAESAR II's "Seismic Wizard" allows you to select the building code of interest (including Canadian NBC), enter the coefficients from the code tables, and CAESAR calculates the G-load for static earthquake analysis, sets the uniform load vectors, and sets the units to G-acceleration.

Expansion Loop Wizard
CAESAR II's "Expansion Loop Wizard" automatically adds an expansion loop in the pipe element you select, with the specific goal of achieving a particular load or stress at a specific point in the model. You select the shape of loop, or optimize for cost, and CAESAR II performs a series of iterations, where it builds a loop, evaluates the load or stress with the target, then repeatedly adjusts the loop until the target is met with the minimum amount of extra material.