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* feat: LOF calc --------- Co-authored-by: Even Solbraa <[email protected]>
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src/main/java/neqsim/processSimulation/measurementDevice/FlowInducedVibrationAnalyser.java
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| package neqsim.processSimulation.measurementDevice; | ||
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| import org.apache.logging.log4j.LogManager; | ||
| import org.apache.logging.log4j.Logger; | ||
| import neqsim.processSimulation.processEquipment.pipeline.PipeBeggsAndBrills; | ||
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| /** | ||
| * <p> | ||
| * FlowInducedVibrationAnalyser class. | ||
| * </p> | ||
| * | ||
| * @author SEROS | ||
| * @version $Id: $Id | ||
| */ | ||
| public class FlowInducedVibrationAnalyser extends MeasurementDeviceBaseClass { | ||
| private static final long serialVersionUID = 1000; | ||
| static Logger logger = LogManager.getLogger(WaterDewPointAnalyser.class); | ||
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| private double supportDistance = 3; | ||
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| private Boolean calcSupportArrangement = false; | ||
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| private String supportArrangement = "Stiff"; // Consult with a mechanical engineer regarding | ||
| // either the support distance or | ||
| // natural frequency of vibrations, especially if measurements have been taken | ||
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| private String method = "LOF"; // Likelihood of failure | ||
| private PipeBeggsAndBrills pipe; | ||
| private Boolean segmentSet = false; | ||
| private int segment; | ||
| private double FRMSConstant = 6.7; | ||
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| /** | ||
| * <p> | ||
| * Constructor for WaterDewPointAnalyser. | ||
| * </p> | ||
| * | ||
| * @param pipe a {@link neqsim.processSimulation.processEquipment.pipeline.PipeBeggsAndBrills} | ||
| * object | ||
| */ | ||
| public FlowInducedVibrationAnalyser(PipeBeggsAndBrills pipe) { | ||
| this("Pipeline Flow Induced Vibration Analyzer", pipe); | ||
| } | ||
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| /** | ||
| * <p> | ||
| * Constructor for FlowInducedVibrationAnalyser. | ||
| * </p> | ||
| * | ||
| * @param name Name of FlowInducedVibrationAnalyser | ||
| * @param pipe a {@link neqsim.processSimulation.processEquipment.pipeline.PipeBeggsAndBrills} | ||
| * object | ||
| */ | ||
| public FlowInducedVibrationAnalyser(String name, PipeBeggsAndBrills pipe) { | ||
| super(name, "pipe"); | ||
| this.pipe = pipe; | ||
| } | ||
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| /** {@inheritDoc} */ | ||
| @Override | ||
| public void displayResult() { | ||
| try { | ||
| } finally { | ||
| } | ||
| } | ||
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| /** {@inheritDoc} */ | ||
| @Override | ||
| public double getMeasuredValue(String unit) { | ||
| if (!segmentSet) { | ||
| segment = pipe.getNumberOfIncrements(); | ||
| } | ||
| double mixDensity = pipe.getSegmentMixtureDensity(segment); | ||
| double mixVelocity = pipe.getSegmentMixtureSuperficialVelocity(segment); | ||
| double gasVelocity = pipe.getSegmentGasSuperficialVelocity(segment); | ||
| double GVF = gasVelocity / mixVelocity; | ||
| if (method.equals("LOF")) { | ||
| double FVF = 1.0; | ||
| if (GVF > 0.88) { | ||
| if (GVF > 0.99) { | ||
| FVF = Math.sqrt(pipe.getSegmentMixtureViscosity(segment) / Math.sqrt(0.001)); | ||
| } else { | ||
| FVF = -27.882 * GVF * GVF + 45.545 * GVF - 17.495; | ||
| } | ||
| } | ||
| double externalDiamater = (pipe.getDiameter() + 2 * pipe.getThickness()) * 1000;// mm | ||
| double alpha = 0.0; | ||
| double betta = 0.0; | ||
| if (supportArrangement == "Stiff") { | ||
| alpha = 446187 + 646 * externalDiamater | ||
| + 9.17E-4 * externalDiamater * externalDiamater * externalDiamater; | ||
| betta = 0.1 * Math.log(externalDiamater) - 1.3739; | ||
| } else if (supportArrangement == "Medium stiff") { | ||
| alpha = 283921 + 370 * externalDiamater; | ||
| betta = 0.1106 * Math.log(externalDiamater) - 1.501; | ||
| } else if (supportArrangement == "Medium") { | ||
| alpha = 150412 + 209 * externalDiamater; | ||
| betta = 0.0815 * Math.log(externalDiamater) - 1.3269; | ||
| } else { | ||
| alpha = 41.21 * Math.log(externalDiamater) + 49397; | ||
| betta = 0.0815 * Math.log(externalDiamater) - 1.3842; | ||
| } | ||
| double diameterOverThickness = externalDiamater / (1000 * pipe.getThickness()); | ||
| double Fv = alpha * Math.pow(diameterOverThickness, betta); | ||
| double LOF = mixDensity * mixVelocity * mixVelocity * FVF / Fv; | ||
| return LOF; | ||
| } else if (method == "FRMS") { | ||
| if (GVF < 0.8) { | ||
| return GVF; | ||
| } else { | ||
| return 1 + 5 * (1 - GVF) * Math.pow(pipe.getDiameter(), 1.6) * FRMSConstant | ||
| * Math.pow(pipe.getSegmentLiquidDensity(segment), 0.6) * Math.pow(mixVelocity, 1.2); | ||
| } | ||
| } | ||
| return Double.NaN; | ||
| } | ||
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| /** | ||
| * <p> | ||
| * Getter for the field <code>method</code>. | ||
| * </p> | ||
| * | ||
| * @return a {@link java.lang.String} object | ||
| */ | ||
| public String getMethod() { | ||
| return method; | ||
| } | ||
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| /** | ||
| * <p> | ||
| * Setter for the field <code>method</code>. | ||
| * </p> | ||
| * | ||
| * @param method a {@link java.lang.String} object | ||
| */ | ||
| public void setMethod(String method) { | ||
| this.method = method; | ||
| } | ||
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| /** | ||
| * <p> | ||
| * Setter for the field <code>segment</code>. | ||
| * </p> | ||
| * | ||
| * @param segment a {@link java.lang.Double} object | ||
| */ | ||
| public void setSegment(int segment) { | ||
| this.segment = segment; | ||
| this.segmentSet = true; | ||
| } | ||
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| public void setFRMSConstant(double frms) { | ||
| this.FRMSConstant = frms; | ||
| } | ||
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| /** | ||
| * <p> | ||
| * Setter for the support arrangement <code>supportArrangement</code>. | ||
| * </p> | ||
| * | ||
| * @param arrangement a {@link java.lang.String} object | ||
| */ | ||
| public void setSupportArrangement(String arrangement) { | ||
| this.supportArrangement = arrangement; | ||
| } | ||
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| /** | ||
| * <p> | ||
| * Setter for the support distance <code></code>. | ||
| * </p> | ||
| * | ||
| * @param distance a {@link java.lang.Double} object | ||
| */ | ||
| public void setSupportDistance(Double distance) { | ||
| this.supportDistance = distance; | ||
| } | ||
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| } |
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