中文摘要：

为解决自适应索杆张力结构的形态控制问题,以节点位移和单元内力的同步调控为目标,考虑了结构的几何非线性,建立了增量形式的主动单元长度调控量的求解方程,通过对该方程系数矩阵的分析,给出了判断结构是否精确可控的条件.引入迭代算法,建立了调控流程,在每步调控后均进行结构响应的更新计算,建立了误差反馈机制,使结果精确可靠.通过算例分析,讨论了算法的有效性.算例的结果表明:内力控制相较形状控制更易实现,均布荷载下的调控效果及求解效率相较非均布荷载更佳,提出的算法能简单判断自适应索杆张力结构的可控性.

英文摘要：

In order to simultaneously solve the force and shape control problems in adaptive cable-strut tensile structures ,both nodal displacements and member internal forces were taken into account as control targets .With the consideration of geometry nonlinearity ,an iterative algorithm to calculate the active length changes was proposed and the precise controllable condition was put forward after a-nalysis on the coefficient matrix in the governing equation .An error feedback mechanism for more re-liable outcomes gaining was introduced by updating the computation of the structural responses under each step of movement of active members .The controlling validity was investigated via case study . T he results indicate that it is easier to achieve the target of internal forces than the target of shape , and both control effect and computational efficiency are better under uniform load case than that under non-uniform load case .The proposed scheme provides a simple and efficient way to judge the control-lability for adaptive cable-strut tensile structures .