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在材料线弹性范围内 ,运用屈曲问题的有限单元法 ,采用MSC公司开发的大型结构分析软件NASTRAN ,探讨各种因素对弧形闸门支臂空间极限承载力的影响规律 ,获得了支臂腹杆和弦杆的最佳布置方式。通过实例分析指出 ,支臂杆的截面特性、支臂腹杆的布置方式、弦杆的布置位置、上下支臂的作用荷载及支铰约束等因素对支臂空间极限承载力都有影响 ,其分析结果对弧门支臂稳定问题进行理论探讨和实际工程设计运用有一定的参考价值
The finite element method of buckling problem and the large-scale structure analysis software NASTRAN developed by MSC Company were used to study the influence of various factors on the ultimate bearing capacity of the armatural gate arm in the range of material line elasticity. Chord rod best arrangement. The case analysis shows that the characteristics of the cross-section of the arm, the arrangement of the webs of the arm, the arrangement of the chord, the acting loads of the upper and lower arms and the constraints of the branch hinges have an impact on the ultimate bearing capacity of the arm. Analysis results of the stability of the arc door to discuss the theoretical issues and practical engineering design has some reference value