复合材料波纹板在剪切载荷下的屈曲特性分析与可靠性优化
发布时间：2018-09-18 07:19
【摘要】：飞机机翼的墙腹板广泛采用复合材料波纹板结构,该结构在剪切载荷作用下的屈曲可靠性是其设计中必须考虑的因素。基于波纹板等效拉伸和弯曲刚度模型,采用Ritz法和最小势能原理,推导了复合材料波纹板临界剪切屈曲载荷的计算方法;充分考虑复合材料属性及外载荷中存在的不确定性,采用区间向量实现不确定参数的定量化;借助参数顶点法确定屈曲载荷因子的上下界,提出了剪切载荷作用下屈曲可靠性的区间分析方法;利用区间可能度指标刻画剪切屈曲可靠度,建立了含不确定参数的复合材料波纹板区间可靠性优化模型。数值算例表明,该方法与有限元方法(FEM)相吻合,优化结果验证了所建立的区间可靠性优化模型及算法的有效性。
[Abstract]:The composite corrugated plate structure is widely used in the wall web of aircraft wing. The buckling reliability of the structure under shear load is a factor that must be considered in its design. Based on the equivalent tensile and bending stiffness model of the corrugated plate, using the Ritz method and the principle of minimum potential energy, the calculation method of the critical shear buckling load of the composite plate is derived, and the uncertainty of the composite property and the external load is fully taken into account. The interval vector is used to quantify the uncertain parameters, the upper and lower bounds of the buckling load factor are determined by the vertex method of parameters, and the interval analysis method of buckling reliability under shear load is proposed. The reliability of shear buckling is described by interval possibility index, and the interval reliability optimization model of composite corrugated plates with uncertain parameters is established. Numerical examples show that the proposed method is in agreement with the finite element method (FEM), and the optimization results verify the validity of the established interval reliability optimization model and algorithm.
【作者单位】： 北京航空航天大学航空科学与工程学院;北京机电工程研究所;
【基金】：国家自然科学基金项目(11432002) 国防基础科研计划项目(A0420132101;JCKY2013601B001;A0820132001) 高等学校学科创新引智计划项目(B07009)
【分类号】：V214.8
本文编号：2247191
[Abstract]:The composite corrugated plate structure is widely used in the wall web of aircraft wing. The buckling reliability of the structure under shear load is a factor that must be considered in its design. Based on the equivalent tensile and bending stiffness model of the corrugated plate, using the Ritz method and the principle of minimum potential energy, the calculation method of the critical shear buckling load of the composite plate is derived, and the uncertainty of the composite property and the external load is fully taken into account. The interval vector is used to quantify the uncertain parameters, the upper and lower bounds of the buckling load factor are determined by the vertex method of parameters, and the interval analysis method of buckling reliability under shear load is proposed. The reliability of shear buckling is described by interval possibility index, and the interval reliability optimization model of composite corrugated plates with uncertain parameters is established. Numerical examples show that the proposed method is in agreement with the finite element method (FEM), and the optimization results verify the validity of the established interval reliability optimization model and algorithm.
【作者单位】： 北京航空航天大学航空科学与工程学院;北京机电工程研究所;
【基金】：国家自然科学基金项目(11432002) 国防基础科研计划项目(A0420132101;JCKY2013601B001;A0820132001) 高等学校学科创新引智计划项目(B07009)
【分类号】：V214.8
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