private void tabPage4_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
int maxX = 0;
int[] tempDiameter = new int[5];
double[] diameter = new double[5];
double maxDiameter;
float x1 = 100, y1 = 10;
for (int i = 0; i <= 500; i += 100)
{
if (MyCalculate.IsMxMyMzMore(i, maxX))
{
maxX = i;
}
}
int maxDiameterIndex;
if ((maxX >= 0 && maxX <= 50) || (maxX >= 450 && maxX <= 500))
{
maxDiameterIndex = 4;
}
else if (maxX > 50 && maxX <= 150)
{
maxDiameterIndex = 3;
}
else if (maxX > 150 && maxX <= 350)
{
maxDiameterIndex = 2;
}
else
{
maxDiameterIndex = 1;
}
g.DrawString("危险截面的横坐标： x=" + Math.Round(a * maxX / 100.0, 2) + "m 截面直径为Φ" + maxDiameterIndex + "\n\n设计直径：",
font1, brush1, x1, y1);
//设计直径1
maxX = 350;
for (int i = 351; i <= 450; i++)
{
if (MyCalculate.IsMxMyMzMore(i, maxX))
{
maxX = i;
}
}
maxDiameter = Math.Pow((32 * Math.Sqrt(MyCalculate.SumOfSquaresMxyz(maxX))) / (pi * permissibleStress), 1 / 3.0);
diameter[1] = maxDiameter * 1000;
g.DrawString("Φ1≥" + Math.Round(maxDiameter * 1000, 2) + "mm 在 x=" + maxX * a / 100.0 + "m 处应力最大",
font1, brush1, x1, y1 + 80);
//设计直径2
maxX = 150;
for (int i = 151; i <= 350; i++)
{
if (MyCalculate.IsMxMyMzMore(i, maxX))
{
maxX = i;
}
}
maxDiameter = Math.Pow((32 * Math.Sqrt(MyCalculate.SumOfSquaresMxyz(maxX))) / (pi * permissibleStress), 1 / 3.0);
diameter[2] = maxDiameter * 1000;
g.DrawString("Φ2≥" + Math.Round(maxDiameter * 1000, 2) + "mm 在 x=" + maxX * a / 100.0 + "m 处应力最大",
font1, brush1, x1, y1 + 120);
//设计直径3
maxX = 50;
for (int i = 51; i <= 150; i++)
{
if (MyCalculate.IsMxMyMzMore(i, maxX))
{
maxX = i;
}
}
maxDiameter = Math.Pow((32 * Math.Sqrt(MyCalculate.SumOfSquaresMxyz(maxX))) / (pi * permissibleStress), 1 / 3.0);
diameter[3] = maxDiameter * 1000;
g.DrawString("Φ3≥" + Math.Round(maxDiameter * 1000, 2) + "mm 在 x=" + maxX * a / 100.0 + "m 处应力最大",
font1, brush1, x1, y1 + 160);
//设计直径4
maxX = 0;
for (int i = 1; i <= 50; i++)
{
if (MyCalculate.IsMxMyMzMore(i, maxX))
{
maxX = i;
}
}
for (int i = 450; i <= 500; i++)
{
if (MyCalculate.IsMxMyMzMore(i, maxX))
{
maxX = i;
}
}
maxDiameter = Math.Pow((32 * Math.Sqrt(MyCalculate.SumOfSquaresMxyz(maxX))) / (pi * permissibleStress), 1 / 3.0);
diameter[4] = maxDiameter * 1000;
g.DrawString("Φ4≥" + Math.Round(maxDiameter * 1000, 2) + "mm 在 x=" + maxX * a / 100.0 + "m 处应力最大",
font1, brush1, x1, y1 + 200);
g.DrawString("之后根据比例关系得(这部分不同人有不同理解）：", font2, brush1, x1, y1 + 240);
int diameterStatus = 1;
tempDiameter[1] = MyCalculate.NearestMoreEvenNumber(diameter[1]) - 2;
while (diameterStatus != 4)
{
tempDiameter[1] += 2;
if (tempDiameter[1] / 1.1 >= diameter[2])
{
tempDiameter[2] = MyCalculate.NearestMoreEvenNumber(tempDiameter[1] / 1.1);
diameterStatus = 2;
}
if (diameterStatus == 2 && tempDiameter[2] / 1.1 >= diameter[3])
{
tempDiameter[3] = MyCalculate.NearestMoreEvenNumber(tempDiameter[2] / 1.1);
diameterStatus = 3;
}
if (diameterStatus == 3 && tempDiameter[3] / 1.1 >= diameter[4])
{
tempDiameter[4] = MyCalculate.NearestMoreEvenNumber(tempDiameter[3] / 1.1);
diameterStatus = 4;
}
}
g.DrawString("Φ1≥ " + tempDiameter[1] + " mm" +
"\n\nΦ2≥ " + tempDiameter[2] + " mm" +
"\n\nΦ3≥ " + tempDiameter[3] + " mm" +
"\n\nΦ4≥ " + tempDiameter[4] + " mm",
font2, brush1, x1, y1 + 270);
textBox13.Text = "" + tempDiameter[1];
}
