For city bag garbage broken up in selectivity,kinematics and mechanics of crusher blade are analyzed.The broken condition is determined,and mathematics expression is induced.

• 以城市袋装生活垃圾破碎(破袋)机为例,针对选择性破碎,从破碎刀片运动与受力的角度进行分析,确定选择性破碎的条件,并导出数学表达式。