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Analysis Objects

The Analysis objects are responsible for performing the analysis. The analysis moves the model along from state at time t to state at time t + dt. This may vary from a simple static linear analysis to a transient (Transient Analysis, VariableTransient Analysis) non-linear analysis. In OpenSees each Analysis object is composed of several component objects, which define the type of analysis how the analysis is performed.

In general terms, the analysis objects are used to solve the following time-dependent equilibrium-equation problem for a transient analysis:

-- transient equilibrium

Where FI is the acceleration-dependent inertial force vector, FR is the velocity (damping) and displacement-dependent (stiffness) resisting-force vector. P(t) is the external applied-force vector. The acceleration, velocity and displacement vectors are all time-dependent.

The component classes consist of the following:

Analysis

In This Chapter

constraints Command

numberer Command

system Command

test Command

algorithm Command

integrator Command

analysis Command

eigen Command

analyze Command

dataBase Commands

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