DNVGL SIMA 4.2

DNVGL SIMA 4.2

SIMA

Sima is a simulation and analysis tool for marine

operations and floating systems — from modelling to

post-processing of results.

Release Note Reference

Option to calculate retardation function from added mass and damping

added to plot editor

SIMA-9812

Fluctuating 3-comp wind, IECWind format (DTUMann)

The default value for number of slices in core has been increased from 10 to

800. This is expected to increase the CPU efficiency when the IECWind

(DTUMann) format is used in the analysis.

SRV-1688

When using parametric wind spectra in coupled analysis the wind velocity

time series is now reported for the hub position. Previously the wind velocity

time series were reported for the reference height of the wind coefficients.

Wind velocity for turbine blades will now be computed by taking the blade

element vertical position into account. Previously the wind velocity at wind

coefficients reference height was used for all blade elements.

This means that results will change slightly compared to older versions.

The new behavior is consistent with how other calculations are made with

other wind types, i.e. Stationary Uniform, Fluctuating two and three

component wind types.

SRV-1749

The Constant Tension Control in Simple Wire Coupling now has input to

specify activation time and deactivation time.

SRV-1685

New Features – RIFLEX

Release Note Reference

Combined blade pitch, electrical power and yaw control system

The external wind turbine control system may now also include Nacelle yaw

control. Currently only one wind turbine can have an external control system.

SRV-1768

A hydrostatic/hydrodynamic load model that accounts for partially

submerged cross section has been made available for thin-walled pipe cross

sections (CRS0), axis-ymmetric cross sections (CRS1) and double symmetric

cross sections (CRS2) as a new hydrodynamic load type. This load model is

available for both beam and bar elements and may be used in dynamic

analyses with regular or irregular waves. Both lumped and consistent

formulations are available.

The new load model will give similar results to the existing partly submerged

cross sections (CRS3 and CRS4) which could not be combined with irregular

waves.

SRV-1706

Several options for controling MatrixPlot storage has been added to static

calculation parameters in RIFLEX

SIMA-9552

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