§10-2计算细长压杆临界力的欧拉公式 10-21两端铰支的细长压杆的临界力 任意截面x上的弯矩为M(x)=Fw(x) 由挠曲线近似微分方程E/w(x)=-M(x)=-FpW(x) 得 w(x)+2w(x)=0 Ec10-2 ޙസ຅Щགئং࠘ॏԅ૘ࣸ٤಴ 10-2-1 ०ժ߳ᄆԅ຅Щགئԅং࠘ॏ ӏᛣ៾䴶 x ϞⱘᔃⶽЎ ( ) ( ) P M x = F w x ⬅ᣴ᳆㒓䖥Ԑᖂߚᮍ⿟ ( ) ( ) ( ) P EIw′′ x = −M x = −F w x ᕫ ( ) ( ) 0 P ′′ + w x = EI F w x