Table of Contents

GeneralisedAlphaFixedStep coming soon

https://bladednextgen.dnv.com/schema/0.4.1/Settings/SolverSettings/Integrator/GeneralisedAlphaFixedStep.json

Not supported yet

Settings for the Generalised Alpha Fixed Step integrator.

  • IntegratorType: string = GeneralisedAlphaFixedStep
  • TimeStep: number (s)
  • Tolerance: number
  • MaximumNumberOfIterations: integer
  • SpectralRadiusAtInfiniteFrequency: number

A type of Integrator

Properties

TimeStep: number (s), optionalcoming soon

The fixed time step used by the integrator. It must be set as a divisor of the output time-step and external controller communication interval.

Tolerance: number, optionalcoming soon

When the "Maximum number of iterations" > 1, the integrator relative tolerance is used to control how many iterations are carried out when integrating the first order and prescribed second order states. Iterations are carried out until the maximum number of iterations is reached, or until the change in all first order and prescribed state derivatives between successive iterations is less than the relative tolerance multiplied by the state derivative absolute value.

default = 0.005

IntegratorType: stringcoming soon

Defines the specific type of Integrator model in use. For a GeneralisedAlphaFixedStep object, this must always be set to a value of GeneralisedAlphaFixedStep.

MaximumNumberOfIterations: integer, optionalcoming soon

The maximum number of iterations for prescribed freedoms and first order states (e.g. dynamic stall & wake). A value of 1 may sometimes inprecisely integrate first order states

default = 1

SpectralRadiusAtInfiniteFrequency: number, optionalcoming soon

This determines the numerical damping of high-frequency modes. A value of 1 provides no numerical damping and a low value provides heavy numerical damping on high-frequency modes which can improve stability but decrease precision.

default = 0.8