复合材料加筋壁板稳定性影响分析

分别运用特征值法和弧长法开展T字型加筋壁板稳定性及其影响因素分析.分析表明:特征值法和弧长法所得结果相近,弧长法分析结果较为安全,特征值法可作为观察模型屈曲位置及模态图的分析方法.加筋壁板屈曲载荷随筋条间距的变化呈抛物线状,较平均的筋条布置有利于加筋壁板的整体稳定性.加筋壁板屈曲载荷随凸缘宽度的变化呈抛物线状,保持筋条横截面面积不变,筋条凸缘宽为60mm时屈曲载荷达到最大值.较小的凸缘宽度会导致筋条屈曲的发生,应在实际设计中予以避免.

Influence analysis on the stability of composite ribbed panel

The stability and influence factors of composite ribbed panel with T stringer were analyzed through eigenvalue analysis method and arc-length method respectively.The results of analyzing indicate that these two methods are similar with arc-length method is safer,while eigenvalue analysis method can be a method for observing buckling position and modal.The ribbed panel buckling load is shown as a parabolic with the changing of stringers gap,thus an average stringer layout is conducive to the stability of ribbed panel.If the ribbed panel buckling load is shown as a parabolic with the changing of flange width with sectional area of stringer being uncahnged,a maximum value of buckling load can be obtained when the width of flange is 60mm.Local bucking on the stringer will happen with width of flange being smaller,which need to be avoided in the actual design.