Table of Contents

BladeStabilityAnalysis coming soon

https://bladednextgen.dnv.com/schema/0.4.1/SteadyCalculation/BladeStabilityAnalysis.json

Not supported yet

Defines a calculation which produces the damping and frequency of all the coupled rotor or blade modes plotted against wind speed for a single rotor. This calculation allows analysis over a wider range of inflow conditions than the Cambell diagram calculation, rather than being constrained to normal operating conditions.

  • SteadyCalculationType: string = BladeStabilityAnalysis
  • MinimumCorrelationCoefficient: number
  • Outputs: object (SteadyCalculationOutputs)
  • TransformRotorModesToNonRotating: boolean
  • AzimuthAngle: number (rad)
  • MaximumPlotFrequency: number (rad/s)
  • CustomLinearModelDll: object (CustomLinearModelDll)
  • Perturbations: object (BladeStabilityPerturbations)
  • ModeOfOperation: object (a type of BladeStabilityAnalysisModeOfOperation)

A type of SteadyCalculation

Properties

MinimumCorrelationCoefficient: number, optionalcoming soon

The minimum acceptable correlation coefficient for the relationship between a state value and a state derivative. If it is below the minimum, the relationship is disregarded and a zero value is taken.

default = 0.8

Outputs: object(SteadyCalculationOutputs), optionalcoming soon

TransformRotorModesToNonRotating: boolean, optionalcoming soon

If true, a multi-blade coordinate (MBC) transform will be performed to transform the rotating modes into the stationary frame of reference. This will generate forward and backward whirling modes in a Campbell diagram.

default = False

AzimuthAngle: number (rad), optionalcoming soon

The fixed azimuth angle of the rotor (zero azimuth indicates blade 1 pointing upwards).

default = 0.0

MaximumPlotFrequency: number (rad/s), optionalcoming soon

The maximum frequency for modes to be shown in the Campbell diagram plot. The default value is 20 * 2 * 3.14159265358979323

default = 125.663706144

CustomLinearModelDll: object(CustomLinearModelDll), optionalcoming soon

The definition for an alternative calculation for the linear model analysis. If omitted, the Bladed calculation will be used.

Perturbations: object(BladeStabilityPerturbations), optionalcoming soon

The perturbations to apply during the linearisation calculations.

SteadyCalculationType: stringcoming soon

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

ModeOfOperation: object (a type of BladeStabilityAnalysisModeOfOperation) coming soon

The operating mode of the turbine for which to analyse the blade stability.

Can be any of the following types: