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杂交型网壳可以发挥各单一传统网壳的优点,在增大跨度的同时又可获得较高的经济效益。文章根据杂交型马鞍型网壳结构特点,采用APDL参数化设计语言研制了两类六种不同杂交型马鞍网壳参数化设计宏程序,运用ANSYS软件对其进行受力性能分析,并对受力性能最好的凯威特—联方(Kie-Lam)网壳进行了108种工况形状优化设计。结果表明:在同等工况下六种杂交型马鞍网壳中Kie-Lam最大位移为6.9 mm和最不应力为25.1 MPa均最小,受力最为合理;矢高f与网壳最不利应力成反比,f每增加1 m最不利应力平均下降幅度最大为0.51 MPa,随Ns变化没有统一规律;在S=60 m、f=30 m不变的情况下,存在一种工况Kn=8、Nx=12和Ns=8满足结构强度、刚度和稳定性前提下,使网壳结构总耗钢量最轻。
Hybrid reticulated shell can play the advantages of each single traditional reticulated shell, while increasing the span of access to higher economic benefits. According to the characteristics of hybrid saddle-type reticulated shell structure, two kinds of six kinds of hybrid saddle-shell shell parametric design macro programs were developed by using APDL parametric design language. The mechanical properties of saddle shell were analyzed by ANSYS software, The best-performing Kuwait-Kie-Lam reticulated shell was optimized for 108 condition shapes. The results show that under the same working conditions, the maximum displacement of Kie-Lam in the six hybrid saddle-shell shells is 6.9 mm and the minimum stress is 25.1 MPa, and the stress is the most reasonable. The height f of flies is inversely proportional to the most unfavorable stress of the shell, f, every 1 m increase in the most unfavorable stress average decline of the maximum 0.51 MPa, with the change of Ns there is no uniform law; S = 60 m, f = 30 m unchanged, there is a working condition Kn = 8, Nx = 12 and Ns = 8 to meet the structural strength, stiffness and stability under the premise of the total reticulated shell structure of the lightest steel consumption.