[MIDAS로 배우는 구조역학] 9장 강제변위 해석 Prespecified Displacement
• YouTube: 
https://www.youtube.com/watch?v=UG2_3YqS3jI&list=PLXMmPDu5-PnfaY2KqGNHYeIbZ4AMntpO1&index=9
• PDF: 
https://www.dropbox.com/s/drk1u2h53woo8db/04_09%20Prespecified%20Displacement.pdf?dl=0