def test_pssCalculateElementForces_horizontal(self):
pssCalculateElementForces(self.structure)
for element in self.structure.e:
self.assertEqual(element.nx,
(self.spacing / self.original_length) *
self.stiffness)
self.assertEqual(element.ny, 0.0)
def test_pssCalculateElementForces_vertical(self):
self.displacement = self.spacing * 2.0
self.structure.n[1].y = self.displacement
self.assertEqual(self.structure.n[1].x, self.spacing)
self.assertEqual(self.structure.n[1].y, self.displacement)
self.assertEqual(self.structure.e[0].dx, self.spacing)
self.assertEqual(self.structure.e[0].dy, self.displacement)
length = self.structure.e[0].length
self.assertEqual(length, math.sqrt((self.displacement ** 2) + (self.spacing ** 2)))
pssCalculateElementForces(self.structure)
force = math.sqrt(self.structure.e[0].nx ** 2 + self.structure.e[0].ny ** 2)
self.assertEqual(force, (length / self.original_length) * self.stiffness)
def test_pssCalculateElementForces_vertical(self):
self.displacement = self.spacing * 2.0
self.structure.n[1].y = self.displacement
self.assertEqual(self.structure.n[1].x, self.spacing)
self.assertEqual(self.structure.n[1].y, self.displacement)
self.assertEqual(self.structure.e[0].dx, self.spacing)
self.assertEqual(self.structure.e[0].dy, self.displacement)
length = self.structure.e[0].length
self.assertEqual(length,
math.sqrt((self.displacement**2) + (self.spacing**2)))
pssCalculateElementForces(self.structure)
force = math.sqrt(self.structure.e[0].nx**2 +
self.structure.e[0].ny**2)
self.assertEqual(force,
(length / self.original_length) * self.stiffness)
def test_pssCalculateElementForces_horizontal(self):
pssCalculateElementForces(self.structure)
for element in self.structure.e:
self.assertEqual(element.nx, (self.spacing / self.original_length) * self.stiffness)
self.assertEqual(element.ny, 0.0)