Hi! I have constructed the local matrices K and M(12×12 matrices) for my frame elements in 3D, but I dont know how to continue to the global system with transformation matrix. I found a lot about 2D problems but in 3D I dont know how to build the matrix in matlab or anything else. If someone knows how to do it, please give me some help. Thank you!!Hi! I have constructed the local matrices K and M(12×12 matrices) for my frame elements in 3D, but I dont know how to continue to the global system with transformation matrix. I found a lot about 2D problems but in 3D I dont know how to build the matrix in matlab or anything else. If someone knows how to do it, please give me some help. Thank you!! Hi! I have constructed the local matrices K and M(12×12 matrices) for my frame elements in 3D, but I dont know how to continue to the global system with transformation matrix. I found a lot about 2D problems but in 3D I dont know how to build the matrix in matlab or anything else. If someone knows how to do it, please give me some help. Thank you!! finite element, transformation matrix, 3d structural MATLAB Answers — New Questions

​