动蹴, ynamic Loading FN=P+pAge Nst F Nd FNd=(1+ )(P+ pAge) fa=kd Nst pAg+pAa 绳索中的动应力为 nd=kd Nst=nd P P+-a a为静荷载下绳索中的静应力 强度条件为oa=K4stS|ol(Dynamic Loading) FNst 绳索中的动应力为 st为静荷载下绳索中的静应力 (1 )( ) Nd P Agx g a F = + + r F = P + rAgx Nst FNd = KdFNst d st Nst d Nd  d K  A F K A F = = = 强度条件为 [ ]  d = Kd st   x m m P rAg x m m r r Ag Aa + a g P P + FNd