关键柱

结构体系中当关键柱破坏后，体系将通过节点的悬索作用实现内力的重新分配，防止结构出现连续倒塌，此时节点将承受弯矩和拉力的共同作用。

After the key column fails , the internal force is redistributed by the catenary action of the joints to prevent the progressive collapse of structures , while the joints are under the state of bending moment combined with tensional force .

因此，其关键环节就是套管柱的下插过程。

Therefore , the key aspect is the casing string interpolation process .

指出大量喷煤，达到喷煤量极限的关键在于改善料柱透气性，提高高炉冶炼水平。

It is shown the key point of reaching the limit of coal injection is improvement of permeability of stock column and enhanced BF operation .

计算分析主要对包括药柱、壳体与隔热层等固体火箭发动机关键部件的药柱结构进行分析。

In order to analyze the solid propellant engine grain structure , the calculation models of one solid propellant engine include a propellant grain , a heat insulation layer and a case .

伴随而来的关键问题就是悬臂柱尺寸的确定，以及串联隔震体系的安全性和稳定性问题，隔震结构设计遇到了新的挑战。

The incident key problems are how to confirm the size of the cantilever column and the safety and stability of the serially connected isolation system . Therefore , new challenges are posed to the design of seismic isolation structure .