/// <summary>
/// This function only handles Symmetric I Built up sections
/// </summary>
/// <param name="previousSection"></param>
/// <returns></returns>
public static ISectionAssumption GetNextAssumption(ISectionAssumption previousSection)
{
ISectionAssumption newSection = new ISectionAssumption();
if (previousSection.Height - previousSection.BotFlangeWidth - previousSection.TopFlangeWidth < maxWebHeight)
{
newSection.Height = previousSection.Height + webHeightIncrementStep;
}
if (previousSection.BotFlangeWidth < maxFlangeWidth)
{
newSection.BotFlangeWidth = newSection.TopFlangeWidth = previousSection.BotFlangeWidth + flangeWidthIncrementStep;
}
if (previousSection.BotFlangeThickness < maxThick)
{
newSection.BotFlangeThickness = newSection.TopFlangeThickness = previousSection.BotFlangeThickness + thickIncrementStep;
}
if (previousSection.WebThickness < maxThick)
{
newSection.WebThickness = previousSection.WebThickness + thickIncrementStep;
}
if (newSection == previousSection)
{
return(null);
}
else
{
newSection.AdjustSectionRatios();
return(newSection);
}
}
public static ISectionAssumption GetNextEndTaperAssumption(ISectionAssumption previousSection)
{
ISectionAssumption newSection = new ISectionAssumption();
//if (previousSection.WebThickness < maxThick)
//{
// newSection.WebThickness = previousSection.WebThickness + thickIncrementStep;
//}
//if (previousSection.BotFlangeWidth < maxFlangeWidth)
//{
// newSection.BotFlangeWidth = newSection.TopFlangeWidth = previousSection.BotFlangeWidth + flangeWidthIncrementStep;
//}
if ((previousSection.Height - previousSection.BotFlangeThickness - previousSection.TopFlangeThickness) * 1.5 < maxWebHeight)
{
newSection.Height = (previousSection.Height + webHeightIncrementStep) * 1.5;
}
if (previousSection.BotFlangeThickness * 1.5 < maxThick)
{
newSection.BotFlangeThickness = newSection.TopFlangeThickness = (previousSection.BotFlangeThickness + thickIncrementStep) * 1.5;
}
if (newSection == previousSection)
{
return(null);
}
else
{
newSection.AdjustSectionRatios();
return(newSection);
}
}
public static ISectionAssumption GetInitialSection()
{
ISectionAssumption sec = new ISectionAssumption();
sec.Height = minWebHeight + mindoublehick + mindoublehick;
sec.BotFlangeWidth = sec.TopFlangeWidth = minFlangeWidth;
sec.BotFlangeThickness = sec.TopFlangeThickness = mindoublehick;
sec.WebThickness = mindoublehick;
sec.AdjustSectionRatios();
return(sec);
}