理想元件--弹簧/阻尼器 0之》 ∫，=K(x2-x) x=K(0,-0) fD=B(2-)=B(y2-) t=B(0-0)=B(02-0) School of Mechanical Engineering ME369-lecture 2.2 Shanghai Jiao Tong University Fall 2015 理想元件 转动惯量(Moment of inertia) M 7777777777777 M=∑f=f-f-f R Ji=∑， School of Mechanical Engineering ME369-lecture 2.2 Shanghai Jiao Tong University Fall 2015 22 BE315-Lecture 2.2 Fall 2011 ME369-lecture 2.2 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University 理想元件----弹簧/阻尼器 2 1   K( )   2 1 ( ) sf   Kx x 21 21 ( )( ) Df    Bx x Bv v   21 2 1     B B ( )( )     BE315-Lecture 2.2 Fall 2011 ME369-lecture 2.2 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University 理想元件----------转动惯量（Moment of inertia) i 123 i Mx    ffff i i J   