For a truss with more than one redundant bar, more than one release will be required to obtain the primary frame .
对于有一个以上多余杆的桁架要得到基本体系,就要放松一个以上的约束。
2
Under the premise of the weight of the entire truss structure satisfying certain constraints, it achieved the minimum flexibility by optimizing the cross-sectional area of the bar.