求英语好的大神帮忙翻译一下

Question

Fig. 1 shows the finite element model of the rotor with beam elements. The rotor dynamic code provided with [20] based on beam finite element model is used to analyze the system. The model consists of 22 Timoshenko beam elements. The turbine disk is modeled
using two large beams with the density of zero. A concentrated mass is used to model the turbine’s inertial properties. The inertial properties of turbine are exactly those modeled in the 3D finite element model. The compressor disk is modeled using two mass less beams and a concentrated mass with inertial properties equals to those modeled in the 3D finite element model. Two springs are
used to model the bearings. Because in the modal test, the system is hanged with two bungees with low stiffness to simulate free–free boundary conditions, the values of the stiffness of the bearings in the modal analysis of the Fig. 4. Measurement points in modal test. Fig. 5. Mode shape 1 (beam model).
4 M.H. Jalali et al. / Measurement 53 (2014) 1–9 rotor at rest are set to very low values. However, for the dynamic analysis of the rotor at operating speeds, the springs are modeled as very stiff elastic constraints. Every node used in the system has 4  of freedom. These include translations in the nodal directions and rotations about nodal axes. Table 1 shows the mechanical and geometric
properties of the elements and Table 2 indicates the characteristics of the concentrated masses.

Answer 1

图1显示了梁单元的转子有限元模型。有[ 20 ]基于梁的有限元模型的转子动态代码是用来分析系统。该模型由22 Timoshenko梁单元。涡轮盘是两modeledusing大梁零密度。集中质量模型涡轮的惯性特性。涡轮的惯性特性正是那些在三维有限元模型。压缩机盘是采用两质量越小梁和集中质量和惯性特性相当于那些在三维有限元模型建模。两弹簧进行模型轴承。因为在模态试验，系统挂两个塞子低刚度来模拟自由–自由边界条件，在图4的模态分析轴承的刚度值。在模态试验测点。图5。模态1（梁）4 M.H. Jalali等人。/测量53（2014）1–9转子静止设置为非常低的值。然而，转子的动力学分析在操作速度，弹簧被建模为非常硬的弹性约束。每个节点在系统中的应用有4个自由度。这些措施包括在节点坐标节点的方向和旋转的翻译。表1显示的元素和表2表明机械geometricproperties集中群众的特点。