By using of virtual work principle and the unit-load method, the elastic-plastic process of loading and deflection of a beam with one degree of indeterminacy under an even load is analyzed.
通过虚功原理和单位荷载法分析了均布荷载作用下一次超静定梁的弹塑性加载及变形过程。
The elastic-plastic loading and deformation process of the statically-indeterminate beam fixed at two ends under uniformly-distributed loads was analyzed by use of the unit-load method, and formulas for bending moment and displacement at different loading stages were derived.
通过单位荷载法分析了两端固支超静定梁在均布荷载作用下的弹塑性加载及变形过程,并给出了加载各阶段的弯矩和位移计算公式。
The unit-load method is an important method for finding displacements of structures in structure mechanics.
在结构力学中，单位荷载法是求结构位移的一种重要方法。
The stress constraint was transformed into movable size constraint with the full stress criterion and the displacement constraint was transformed into an approximate explicit function of design variables with the unit virtual load method.
将准则法和数学规划法相结合,借助满应力准则将应力约束转化为动态尺寸约束,利用单位虚载荷法将位移约束转化为设计变量的显式表达式建立优化模型,然后用数学规划法求解;采用无量纲设计变量实现设计变量连接,对膜结构的厚度进行优化设计;根据对偶理论,应用对偶规划精确映射原问题,再按泰勒展式建立对偶问题的二阶近似。