摘要
利用板和筋的变形协调关系并忽略筋上剪切应变,应用能量法通过Hamilton变分得到加筋板的非线性运动控制方程。横向位移函数采用双级数假设,结合模态分析结果,取其基础模态。用准矩截断法线性化控制方程,估算板的应变响应。在行波管中进行声激励试验,并将估算的结果与试验结果比较,结果表明分析方法可用于工程计算。
Applying the distortion harmonization relationship between the plate and the stiffeners, the motion equation of the stiffened plates was deduced through Hamilton variation and neglecting the shearing strain. The lateral deformation function is assumed consulting the results of mode analysis in which the basic modes contributes much. The motion equation is then linearized and resolved. At last, the experiments were carried out in the progressive wave tube. The strains are measured and compared with the results of computing. It shows which this analytical method of acoustical response for stiffened plates can be used the engineering computation.
出处
《强度与环境》
2009年第6期1-7,共7页
Structure & Environment Engineering
基金
航空科学基金2008ZA23002<飞机蒙皮壁板结构非线性声响应分析方法研究>
关键词
非线性振动
加筋板
声载荷
模态
声疲劳试验
行波管
nonlinear vibration
stiffened plate
acoustic load
mode
sonic fatigue
progressative wave tube （PWT）
