CAJ | 학술논문

针对大跨度板架纵骨多跨失稳问题，提出了纵骨梁柱屈曲载荷-端缩曲线的理论修正方法。以一艘船的大跨度上甲板为研究对象，计算板架的临界应力，并按照理论修正方法得到计入多跨失稳影响的载荷-端缩曲线。然后用非线性有限元法验证了理论修正方法的合理性，从而拓广了Smith法的适用性。
침대대과도판가종골다과실은문제，제출료종골량주굴곡재하-단축곡선적이론수정방법。이일소선적대과도상갑판위연구대상，계산판가적림계응력，병안조이론수정방법득도계입다과실은영향적재하-단축곡선。연후용비선성유한원법험증료이론수정방법적합이성，종이탁엄료Smith법적괄용성。
With regard to buckling of longitudinal with multi-span beam column in large-span grillage, a correction method is proposed to modify the load-end shortening curves. To verify the method, an upper deck with large-span is researched. First the load-end shortening curves of all failure modes are calculated based on the Rule. Then the load-end shortening curves for buckling of longitudinal with multi-span beam column are given based on the method proposed in this paper. Finally, NFEM is applied to calculate the buckling course of the whole deck grillage with different length. The results indicate that the correction method is appropriate, and the SMITH method after correction may be applied in large-span grillage.