结构的斜撑杆布局与优化分析

应用组合理论，通过改变六面体刚架结构面上的斜撑杆添加方向获得布局不同的模型，并采用有限元方法对相应的结构进行了静力分析和固有频率分析，对部分模型进行了静力实验。结果表明：不同斜撑杆布局结构的抗扭性能有明显变化，合理的布局不仅明显提高了结构的抗扭刚度，也降低了扭转工况下的应力水平；但布局的变化对结构的固有频率影响不明显。

Optimization of Slant Beams Layout in Structure

In this paper,the models with different layout direction of slant beams on surfaces of hexahedron rigid-framed structure are obtained with combinatorial theory and the static stress and natural frequency of the models are analyzed.Meanwhile,parts of the models are tested for their static stress.The results show that the torsion properties of the structures with different slant beam layout vary significantly,and proper layout can increase the torsion stiffness of the structure and decreases the stress under torsion,but the natural frequencies of the structure do not exhibit significant change with that of the layout.