45 lines
1.9 KiB
C#
45 lines
1.9 KiB
C#
using StructureHelperCommon.Infrastructures.Exceptions;
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using StructureHelperCommon.Models;
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using StructureHelperCommon.Models.Loggers;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace StructureHelperLogics.NdmCalculations.Buckling
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{
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internal class EilerCriticalForceLogic : IEilerCriticalForceLogic
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{
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public double LongitudinalForce { get; set; }
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public double StiffnessEI { get; set; }
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public double DesignLength { get; set; }
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public IShiftTraceLogger? TraceLogger { get; set; }
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public double GetCriticalForce()
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{
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double Ncr = - Math.Pow(Math.PI, 2) * StiffnessEI / Math.Pow(DesignLength, 2);
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string message = string.Format("Ncr = - (PI ^ 2) * D / L0 ^2 = - ({0} * {1} / ({2} ^2)) = {3}, N", Math.PI, StiffnessEI, DesignLength, Ncr);
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TraceLogger?.AddMessage(message);
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return Ncr;
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}
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public double GetEtaFactor()
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{
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TraceLogger?.AddMessage(LoggerStrings.CalculatorType(this), TraceLogStatuses.Service);
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if (LongitudinalForce >= 0d) return 1d;
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var Ncr = GetCriticalForce();
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if (LongitudinalForce <= Ncr)
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{
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string error = string.Format("Absolute value of longitudinalForce is greater or equal than critical force N = {0} => Ncr = {1}", Math.Abs(LongitudinalForce), Ncr);
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TraceLogger?.AddMessage(error, TraceLogStatuses.Error);
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throw new StructureHelperException(ErrorStrings.LongitudinalForceMustBeLessThanCriticalForce);
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}
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double eta = 1 / (1 - LongitudinalForce / Ncr);
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string message = string.Format("Eta factor Eta = 1 / (1 - N / Ncr) = 1 / (1 - {0} / {1}) = {2}, {3}", (-1) * LongitudinalForce, (-1) * Ncr, eta, LoggerStrings.DimensionLess);
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TraceLogger?.AddMessage(message);
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return eta;
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}
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}
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}
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