public void eulerbernoullybeam_dirZ_diff()
{
var w = 2.0;
var a = 4;
var nodes = new Node[2];
nodes[0] = (new Node(0, 0, 0)
{
Label = "n0"
});
nodes[1] = (new Node(5.2355, 0, 0)
{
Label = "n1"
});
var elm = new BarElement(nodes[0], nodes[1])
{
Label = "e0"
};
var L = (elm.Nodes[1].Location - elm.Nodes[0].Location).Length;
var b = L - a;
var hlpr = new EulerBernoulliBeamHelper(BeamDirection.Z, elm);
var n0 = hlpr.GetNMatrixAt(elm, -1);
var n1 = hlpr.GetNMatrixAt(elm, 1);
var epsilon = 1e-5;
Assert.IsTrue(Math.Abs(n0[1, 1] - L / 2) < epsilon, "invalid value");
}
private static void TestMultinodeBar1()
{
var n = 2;
var bar = new BarElement(n);
var hlp = new EulerBernoulliBeamHelper(BeamDirection.Y, bar);
for (var i = 0; i < n; i++)
{
bar.Nodes[i] = new Node(i * 3, 0, 0);
}
var testXi = -0.66;
//var n1 = hlp.GetNMatrixBar2Node(bar, testXi);
var n2 = hlp.GetNMatrixAt(bar, testXi);
var b = hlp.GetBMatrixAt(bar, testXi);
//var d = n1 - n2;
}
public void eulerbernoullybeam_dirZ()
{
var w = 2.0;
var a = 4;
var nodes = new Node[2];
nodes[0] = (new Node(0, 0, 0)
{
Label = "n0"
});
nodes[1] = (new Node(4, 0, 0)
{
Label = "n1"
});
var elm = new BarElement(nodes[0], nodes[1])
{
Label = "e0"
};
var L = (elm.Nodes[1].Location - elm.Nodes[0].Location).Length;
var b = L - a;
var hlpr = new EulerBernoulliBeamHelper(BeamDirection.Z, elm);
for (var i = 0.0; i <= 1; i += 0.01)
{
var x = i * L;
var iso = elm.LocalCoordsToIsoCoords(x);
var n = hlpr.GetNMatrixAt(elm, iso);
var n1 = n[0, 0];
var m1 = n[0, 1];
var n2 = n[0, 2];
var m2 = n[0, 3];
var n1p = n[1, 0];
var m1p = n[1, 1];
var n2p = n[1, 2];
var m2p = n[1, 3];
var xi = iso[0];
var n1e = 0.25 * (2 - 3 * xi + xi * xi * xi);
var m1e = 0.125 * L * (1 - xi - xi * xi + xi * xi * xi);
var n2e = 0.25 * (2 + 3 * xi - xi * xi * xi);
var m2e = 0.125 * L * (-1 - xi + xi * xi + xi * xi * xi);
var epsilon = 1e-5;
Assert.IsTrue(Math.Abs(n1 - n1e) < epsilon, "invalid value");
Assert.IsTrue(Math.Abs(n2 - n2e) < epsilon, "invalid value");
Assert.IsTrue(Math.Abs(m1 - m1e) < epsilon, "invalid value");
Assert.IsTrue(Math.Abs(m2 - m2e) < epsilon, "invalid value");
}
}