.7.1相关计算结果(低加)7.1.1 钢丝绳强度校核以7号低加为计算依据,7号低加外形尺寸1932mm16540mm,兜吊间距4400mm,拟采用2根32mm30m的钢丝绳,8股受力,7号低加重约41.4t。吊装受力分析详见下图:OA=(30000-19323.14)/4=5983.38mmOE=1932/2=966mm OF=4400/2=2200mmOA= (OE2+OF2)1/2=(9662+22002)1/2=2402.74mmOO=(OA2-OA2) 1/2=(5983.382-2402.742)1/2=5479mm根据低加中心线至顶部距离1350mmOO=5479mm,则满足钢丝绳吊挂要求。吊装夹角为:=arccos (OO/OA)= arccos(5479/5983.38)=23.7每股钢丝绳承受拉力F=41.4t/(8cos)=5.65t低加吊装钢丝绳采用3230m,抗拉强度为1770MPa式中:-钢丝绳最小破断拉力,KN -钢丝绳的公称直径