论文部分内容阅读
为更好掌握开口肋加劲板的设计计算方法,采用弹性稳定分析方法,对无纵向和横向加劲肋的四边简支板、纵向加劲肋等间距布置的四边简支加劲板、纵向和横向加劲肋等间距布置的加劲板进行屈曲模态和临界屈曲应力分析。结果表明:对于四边简支板或四边简支加劲板,临界屈曲应力与板宽、板长和板厚均有关,减小板宽和板长以及增大板厚可提高临界屈曲应力;随着加劲肋刚度比的变化,四边简支加劲板一般表现出3种屈曲模态,模态1为加劲肋与被加劲板共同发生整体屈曲,模态2为在加劲肋处形成波节,加劲肋与被加劲板发生屈曲,模态3为加劲肋为刚性加劲肋,不会发生失稳,只有被加劲板发生局部失稳;临界屈曲应力随加劲肋刚度比的增大而增大,模态1增大幅度最大,模态2次之,模态3逐步趋于定值。
In order to better understand the design and calculation method of the stiffened plate with open ribs, four-sided simply supported stiffening plate, longitudinally and transversely stiffened stiffeners, such as four-sided simply supported plate without longitudinal and transverse stiffeners, Buckling modes and critical buckling stress analysis of stiffened plates arranged at equal intervals. The results show that the critical buckling stress is related to the plate width, the plate length and the plate thickness for simply supported or simply supported stiffened plates. The critical buckling stress can be increased by reducing the plate width and plate length and increasing the plate thickness. Stiffener stiffness ratio changes, the four simply supported stiffened plate generally shows three types of buckling mode, the modal 1 is stiffened stiffened plate together with the overall buckling, mode 2 in the stiffener to form nodes, stiffeners And the stiffened plate is buckled. In mode 3, the stiffener is a stiffened stiffener without instability, and only the buckling plate is locally buckled. The critical buckling stress increases with the stiffener stiffness ratio increasing. The modal 1 increase the largest, modal 2 times, mode 3 gradually tends to set value.