示例#1
0
        public void ThreeNodeSimplySupportedBeam() //TODO verify results using independent check
        {
            FiniteElementModel model = new FiniteElementModel(ModelType.Frame2D);
            FiniteElementNode  node1 = model.NodeFactory.CreateFor2DTruss(0, 0);

            model.ConstrainNode(node1, DegreeOfFreedom.X);
            model.ConstrainNode(node1, DegreeOfFreedom.Z);

            FiniteElementNode node2 = model.NodeFactory.CreateFor2DTruss(1, 0);

            FiniteElementNode node3 = model.NodeFactory.CreateFor2DTruss(2, 0);

            model.ConstrainNode(node3, DegreeOfFreedom.Z);

            IMaterial     material = new GenericElasticMaterial(0, 10000000000, 0, 0);
            ICrossSection section  = new GenericCrossSection(0.0001, 0.0002);

            model.ElementFactory.CreateLinear1DBeam(node1, node2, material, section);
            model.ElementFactory.CreateLinear1DBeam(node2, node3, material, section);

            ForceVector force = model.ForceFactory.Create(0, 0, -10000, 0, 0, 0);

            model.ApplyForceToNode(force, node2);

            IFiniteElementSolver solver = new MatrixInversionLinearSolver(model);

            Stiffness.GlobalModelStiffnessMatrixBuilder gmsmb = new SharpFE.Stiffness.GlobalModelStiffnessMatrixBuilder(model);
            Console.WriteLine(gmsmb.BuildKnownForcesUnknownDisplacementStiffnessMatrix());

            FiniteElementResults results = solver.Solve();

            DisplacementVector node1Displacement = results.GetDisplacement(node1);

            Console.WriteLine("node1Displacement : " + node1Displacement);

            DisplacementVector node2Displacement = results.GetDisplacement(node2);

            Console.WriteLine("node2Displacement : " + node2Displacement);

            DisplacementVector node3Displacement = results.GetDisplacement(node3);

            Console.WriteLine("node3Displacement : " + node3Displacement);

            ReactionVector node1Reaction = results.GetReaction(node1);

            Console.WriteLine("node1Reaction : " + node1Reaction);

            ReactionVector node3Reaction = results.GetReaction(node3);

            Console.WriteLine("node5Reaction : " + node3Reaction);

            Assert.AreEqual(-0.000833333, node2Displacement.Z, 0.0000001);
            Assert.AreEqual(5000, node1Reaction.Z, 0.001);
            Assert.AreEqual(5000, node3Reaction.Z, 0.001);
            Assert.AreEqual(0, node2Displacement.YY, 0.0001);
            Assert.AreEqual(0.00125, node1Displacement.YY, 0.0000001);
            Assert.AreEqual(-0.00125, node3Displacement.YY, 0.0000001);
        }
示例#2
0
        public void ThreeNodeSimplySupportedBeam()
        {
            FiniteElementModel model = new FiniteElementModel(ModelType.Full3D);
            FiniteElementNode node1 = model.NodeFactory.Create(0, 0, 0);
            model.ConstrainNode(node1, DegreeOfFreedom.X);
            model.ConstrainNode(node1, DegreeOfFreedom.Y);
            model.ConstrainNode(node1, DegreeOfFreedom.Z);
            model.ConstrainNode(node1, DegreeOfFreedom.XX);

            FiniteElementNode node2 = model.NodeFactory.Create(1, 0, 0);

            FiniteElementNode node3 = model.NodeFactory.Create(2, 0, 0);
            model.ConstrainNode(node3, DegreeOfFreedom.X);
            model.ConstrainNode(node3, DegreeOfFreedom.Y);
            model.ConstrainNode(node3, DegreeOfFreedom.Z);
            model.ConstrainNode(node3, DegreeOfFreedom.XX);

            IMaterial material = new GenericElasticMaterial(0, 10000000000, 0, 84000000000);
            ICrossSection section = new GenericCrossSection(0.0001, 0.0002, 0.0002, 0.00005);

            model.ElementFactory.CreateLinear3DBeam(node1, node2, material, section);
            model.ElementFactory.CreateLinear3DBeam(node2,node3,material,section);

            ForceVector force = model.ForceFactory.Create(0, 0, -10000, 0, 0, 0);
            model.ApplyForceToNode(force, node2);

            IFiniteElementSolver solver = new MatrixInversionLinearSolver(model);

            Stiffness.GlobalModelStiffnessMatrixBuilder gmsmb = new SharpFE.Stiffness.GlobalModelStiffnessMatrixBuilder(model);
            Console.WriteLine(gmsmb.BuildKnownForcesUnknownDisplacementStiffnessMatrix());

            FiniteElementResults results = solver.Solve();

            DisplacementVector node1Displacement = results.GetDisplacement(node1);
            Console.WriteLine("node1Displacement : " + node1Displacement);

            DisplacementVector node2Displacement = results.GetDisplacement(node2);
            Console.WriteLine("node2Displacement : " + node2Displacement);

            DisplacementVector node3Displacement = results.GetDisplacement(node3);
            Console.WriteLine("node3Displacement : " + node3Displacement);

            ReactionVector node1Reaction = results.GetReaction(node1);
            Console.WriteLine("node1Reaction : " + node1Reaction);

            ReactionVector node3Reaction = results.GetReaction(node3);
            Console.WriteLine("node5Reaction : " + node3Reaction);

            Assert.AreEqual(-0.000833333, node2Displacement.Z, 0.0000001);
            Assert.AreEqual(5000, node1Reaction.Z, 0.001);
            Assert.AreEqual(5000, node3Reaction.Z, 0.001);
            Assert.AreEqual(0, node2Displacement.YY, 0.0001);
            Assert.AreEqual( 0.00125, node1Displacement.YY, 0.0000001);
            Assert.AreEqual(-0.00125, node3Displacement.YY, 0.0000001);
        }
        public void ThreeNodeBeam()
        {
            FiniteElementModel model = new FiniteElementModel(ModelType.Full3D);
            FiniteElementNode  node1 = model.NodeFactory.Create(0, 0, 0);

            model.ConstrainNode(node1, DegreeOfFreedom.X);
            model.ConstrainNode(node1, DegreeOfFreedom.Y);
            model.ConstrainNode(node1, DegreeOfFreedom.Z);
            model.ConstrainNode(node1, DegreeOfFreedom.XX);

            FiniteElementNode node2 = model.NodeFactory.Create(1, 0, 0);

            model.ConstrainNode(node2, DegreeOfFreedom.Y);

            FiniteElementNode node3 = model.NodeFactory.Create(2, 0, 0);

            model.ConstrainNode(node3, DegreeOfFreedom.Y);
            model.ConstrainNode(node3, DegreeOfFreedom.Z);

            IMaterial     material = new GenericElasticMaterial(0, 10000000000, 0.3, 1000000000);
            ICrossSection section  = new SolidRectangle(1, 1);

            model.ElementFactory.CreateLinear3DBeam(node1, node2, material, section);
            model.ElementFactory.CreateLinear3DBeam(node2, node3, material, section);

            ForceVector force = model.ForceFactory.Create(0, 0, -10000, 0, 0, 0);

            model.ApplyForceToNode(force, node2);

            IFiniteElementSolver solver = new MatrixInversionLinearSolver(model);

            Stiffness.GlobalModelStiffnessMatrixBuilder gmsmb = new SharpFE.Stiffness.GlobalModelStiffnessMatrixBuilder(model);
            Console.WriteLine(gmsmb.BuildKnownForcesUnknownDisplacementStiffnessMatrix());

            FiniteElementResults results = solver.Solve();

            DisplacementVector node1Displacement = results.GetDisplacement(node1);

            Console.WriteLine("node1Displacement : \n" + node1Displacement);

            DisplacementVector node2Displacement = results.GetDisplacement(node2);

            Console.WriteLine("node2Displacement : \n" + node2Displacement);

            DisplacementVector node3Displacement = results.GetDisplacement(node3);

            Console.WriteLine("node3Displacement : \n" + node3Displacement);

            ReactionVector node1Reaction = results.GetReaction(node1);

            Console.WriteLine("node1Reaction : \n" + node1Reaction);

            ReactionVector node3Reaction = results.GetReaction(node3);

            Console.WriteLine("node5Reaction : \n" + node3Reaction);

            Assert.AreEqual(0, node2Displacement.XX, 0.00001);
            Assert.AreEqual(0, node2Displacement.Y, 0.00001);
            Assert.AreEqual(0, node2Displacement.ZZ, 0.0001);
            Assert.AreEqual(-0.000002, node2Displacement.Z, 0.0000001);

            Assert.AreEqual(5000, node1Reaction.Z, 0.00001);
            Assert.AreEqual(5000, node3Reaction.Z, 0.00001);
            Assert.AreEqual(0, node2Displacement.YY, 0.0001);
            Assert.AreEqual(0.000003, node1Displacement.YY, 0.0000001);
            Assert.AreEqual(-0.000003, node3Displacement.YY, 0.0000001);
        }