CAJ | 학술논문

对结构物理参数和几何尺寸同时具有随机性的桁架结构动力特性进行了分析，构建了以杆截面积为设计变量，结构重量极小化为目标函数，满足基频和频率禁区可靠性约束的结构动力优化设计数学模型，并对其中关切频率的估定、两种频率约束的统一表示等予以讨论，利用复合形法求解．最后给出了两个算例．
대결구물리삼수화궤하척촌동시구유수궤성적항가결구동력특성진행료분석，구건료이간절면적위설계변량，결구중량겁소화위목표함수，만족기빈화빈솔금구가고성약속적결구동력우화설계수학모형，병대기중관절빈솔적고정、량충빈솔약속적통일표시등여이토론，이용복합형법구해．최후급출료량개산례．
The problem of truss structure dynamic optimization with thereliability constraints of the frequency is studied. Considering the random ness of both physical parameters (elastic module and mass density) of structural materials and the geometric size of bars, the structure dynamic characteristics are analyzed based on probability. The distribution parameters of dynamic chara cteristic random variable are derived from the Rayleighs quotient. The dynamic optimization mathematical model of truss structure is developed with the reliab ility constraints of frequency and forbidden frequency domain. Finally, the corr esponding program system is designed and two examples are given.