本文用有限元素法和对于几何非线性结构问题的增量法求解组合结构强度与稳定性问题。

This paper is devoted to solving strength and stability problems of a built structure by using the finite element method and the increment method for the geometrical nonlinear structural problem.

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采用新材料、改造其结构来提高曲轴箱的强度与稳定性更是实际中亟待解决的重要课题之一。

Then, to enhance the intensity and stability of Crankcase Box through adopting new material and optimizing its structure are the important topics which need solved.

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试验与计算的结果均表明该抱杆结构满足强度与稳定性设计要求，吊装过程中抱杆不会发生破坏。

The experimental and numerical results indicate that the structure of the tower crane meets the demands of design in both strength and stability.

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