摘要
基于Hamilton变分原理,推导具有几何非线性特点的大展弦比直机翼的自由运动方程。基于所推导的运动方程,将机翼简化成薄壁盒型梁,分别对铝合金梁和复合材料梁进行MATLAB仿真,得到机翼的固有频率。并且将仿真得到的结果与用NASTRAN计算得到的结果进行比较,两者所得的结果一致。
Because of large flexibilities,the traditional analytical method based on small deformation assumption is not applicable for large-aspect-ratio wings.To correctly reflect its geometric nonlinearities,equations of free motion is developed based on Hamilton s principle.The wing was simplified into a thin-walled box beam.Finite element method is used to solve the wing equation.Matlab is used to calculate the natural frequencies of an aluminum beam and a composite beam respectively.Simulation results and NASTRA...
出处
《机械强度》
CAS
CSCD
北大核心
2010年第5期854-858,共5页
Journal of Mechanical Strength
关键词
大展弦比机翼
几何非线性
薄壁盒型梁
有限元
High-aspect-ratio wing
Geometric nonlinearity
Thin-walled box beam
Finite element method
