深井钻机井架及底座系统的有限元静力分析

摘要

在对钻机进行工况分析的基础上,通过命令流方式用ANSYS建立了ZJ70LDB钻机井架和底座的实体模型,并采用Beam188单元进行网格划分.针对最大钩载和最大转盘梁载荷这2种工况,对井架和底座系统进行了有限元静力分析,分析结果表明,最大钩载工况下的应力和位移均较大,最大位移为28.417 mm,发生在井架顶部,最大应力为205.061 MPa,位于井架下部与人字腿上方,但此处为钻机结构的薄弱环节,使用中应加以关注,以避免失效.%On the basis of analyzing the operating condition of drilling rig,the ANSYS software was adopted to establish the solid model of the ZJ70LDB drilling rig derrick and substructure through command stream.The Beam188 unit was adopted to conduct mesh generation.The finite element analysis of the derrick and substructure system was conducted with regard to the maximum hook load and the maximum rotary table beam load.It has been found that the stress and displacement are both remarkable under the maximum hook load operating condition.The maximum displacement is 28.417 mm,taking place on the top of derrick.The maximum stress is 205.061 MPa,located at the lower part of derrick and above the herringbone leg,but this place is the weak position of drilling rig.Therefore,attention should be paid to in use of the rig in order to avoid failure.