Applying structural analysis software MSC/NASTRAN, the finite element analysis of strength is done for the derrick and hoisting mechanism in the hoisting system of the 1300T floating crane under the working condi-tions of various combinations of loads. According to the working conditions, the stresses of derrick and the danger-ous cross section of hoisting mechanism are tested and analyzed. Also, the weak sections of every part are pointed out and the improvements are proposed.%采用结构分析软件MSC/NASTRAN,对1 300t起重船起吊系统中的吊臂、千斤柱在各种组合载荷工况下的强度进行了有限元分析.根据实际工况对吊臂、千斤柱危险截面的应力进行了测试与分析,指出了各部分的薄弱环节,并提出了加强措施.
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