摘要
基于平板颤振理论,建立了用于确定含有8个颤振导数的平板颤振临界风速的双参数优化模型;提出了搜索该优化模型最优解的追赶法,该方法融合随机遍历性和反馈功能来快速获得最优目标。经算例验证,基于优化模型的追赶法计算简便,精度令人满意,为平板颤振参数的计算提供了新的有效途径。借助追赶法的强健性,能够方便地绘出平板颤振临界折算风速和当量频率的诺模图。
Based on the flutter theory of flat plate, a new optimization model concerning twin undetermined parameters is proposed for determining the critical flutter wind velocity of flat plate involving 8 flutter derivatives. The new pursuit method, which is of stochastic ergodicity and feedback performance, is developed for acquiring the optimum solution rapidly. An example shows that the pursuit method is valid for attaining satisfactory precision with convenience on the basis of the optimization model, and proves to be a new effective approach for the calculation of flutter parameters of flat plate. By means of the superior robustness of the pursuit method, the nomograms of the critical flutter reduced wind velocity and the equivalent frequency of flat plate can be plotted conveniently.
出处
《工程力学》
EI
CSCD
北大核心
2005年第5期48-53,共6页
Engineering Mechanics
基金
国家自然科学基金资助项目(50478109)
关键词
平板颤振
优化模型
追赶法
颤振参数
诺模图
flat plate flutter
optimization model
pursuit method
flutter parameters
nomogram
