three-legged derrick

Derrick Rose is averaging 19.3 points and 4.4 assists per game, coming off the bench for the Minnesota Timberwolves. He is shooting 50.5% from the field and 49.4% from the three-point line.

替补出场的罗斯，本赛季在森林狼场均可以得到19.3分和4.4次助攻，投篮命中率为50.5%，三分命中率为49.4%。

The dynamic characteristics analysis is made for the derrick structure of the offshore drilling rig in some well drilling companies. This paper mainly deals with simulation and stability analysis and simplifies each member as three-dimensional beam unit with finite element method.

对在役海洋石油钻机井架进行了结构动力特性分析，并采用有限元法将钻机井架各杆件简化为空间梁单元，对钻机井架三维计算模型进行了离散，给出了模态分析和稳定性分析结果。

Three-dimensional entity model of derrick raising mechanism without cable is built by Pro/ E, and then the geometrical model is created using ADAMS.

在Pro/E中建立了不含绳索的井架起升装置三维实体模型，进而建立了ADAMS几何模型。

In this paper, the author establishes the computer numerical model to calculate mechanical parameters with I-DEAS software by adopting simplified three dimensional beam element as the basis element for FEM and analyzes dynamic characteristic for JJ160/ 41-K type derrick under the design loading.

运用I DEAS软件，以简化的空间梁单元建立计算机FEM模型，对JJ160/41K型钻机井架进行了设计载荷下的动力特性分析。