应力轴

A test model of four co-rotating disks was developed as the simplified version of a typical internal cooling system of a gas turbine compressor. The investigation was on the distribution of local heat transfer coefficient and the averaged nusselt number of the downstream main disk. Experimental analysis may lead to following conclusions: the distribution is not of monotony and multi-peaks were found along the disk surface,Nu increases with the decrease of the rotational reynold number Re(subscript w,Nu increases with the axial reynold number and the grasholf number.

针对航空发动机多级压气机盘腔的冷却问题，对具有轴向通流的三腔模型进行了系统的研究，通过对局部换热特性与平均换热特性的分析，可以表征旋转盘的热应力水平和相对冷却效果，结果表明表征旋转盘热应力水平的局部换热特性在旋转盘的半径上呈多峰分布，表征相对冷却效果的平均换热特性与旋转雷诺数Re、进气雷诺数Re以及格拉晓夫数Gr有关，当Re及Gr增加时，平均努塞尔数Nu随之增加，而Re的增加使之减小。

The model included speed control, load control, valve management, valves test, RUNBACK, overspeed protection, LDA, CIV, ETS, RSM, MEH, gland seal system etc, discussed the strategy of valve management, RSM, control loop smooth switching with emphasis.

模型包括了转速控制、负荷控制、阀门管理、阀门试验、RUNBACK、超速保护、甩负荷预测、中压调门快关-快开、紧急跳闸保护、转子热应力控制、MEH控制和轴封控制等功能，重点讨论了阀门管理策略、负荷控制回路无扰切换策略和转子热应力控制策略，对实际系统尚未投入使用的甩负荷预测和中压调门快关-快开功能也进行了建模仿真。

Under the mantlerock, the Tangential stress increases gradually and the Vertical stress goes slightly down.

最大主应力约等于竖向应力，与井筒轴向夹角为11.9°～14.25°。

It is found that the shear stress in the torsional bar is much higher than that in the main shaft except blowing operation.

发现了除吹炼工况外扭力杆剪应力明显高于耳轴剪应力等现象。

Analyzes and calculates the stress and torsional deflection of large transformers such as DEP-240 MVA/500 kV,SEP-720 MVA/500 kV,etc.influeced by axial current component of low voltage spiral windings.Gives the distribution rules of torsional stress of unit length and displacement following windings height.Provides the reference for optimization design of large transformer.

对DEP-240 MVA/500 kV、SEP-720 MVA/500 kV型大型电力变压器低压螺旋绕组在轴向电流分量作用下产生的应力及扭转变形问题进行了分析计算，给出了低压螺旋绕组单位长度扭转应力及位移沿绕组高度的分布规律，为大型变压器的优化设计提供了参考依据。

Based on true triaxial tests, this paper proposes an angle of equivalent internal friction a.

结合以往的真三轴试验结果，建议了一个复杂应力状态下的等效内摩擦角，在此基础上提出了一个考虑中主应力影响的无粘性土(c=0)的破坏准则。

Slipper type universal coupling"s fork joint and palm end are the weak parts of the main transmission system. In this article, the two parts" intensity values are obtained through finite element analysis . After making three-dimensional computer simulation analysis by ANSYS, the results show that the middle arc of the fork joint in loaded side and the intersection of fork bore and the arc are the danger location, where the stress is largest and stress concentration is serious.

本文对轧机主传动系统机械部分的薄弱部件进行强度计算，即对滑块式万向联轴器的主要零部件的强度进行有限元分析，通过ANSYS有限元分析软件进行三维计算机仿真，由计算结果可知，在叉头受载侧过渡圆弧段中部、叉头镗孔与过渡圆弧交接处这两个部位的应力最大且存在严重的应力集中，考虑到单元总数限制及计算时间等因素，整体模型的网格划分较疏，不能反映倒圆角等细节。

On strength computation,the finite element models of rotating mirror were established according to the real structure of the mirror,and the rotating three-faced beryllium mirror were analysed.Results display that the surface deformation magnitude of the mirror is approximately 0.334 6 μm,and the maximum stress is 0.204 GPa at 600 m/s of edge linear speeed.The regions of maximum stress are on the axial hole and symmetric to symmetrical planes of mirror body,and keep beelines to surfaces.On the modal analysis,the results show that the first and second modals of bending vibration exist around 3.4×105 r/min and 6.6×105 r/min,which appear binate and orthogonal respectively,and another modal belongs to the first torsional vibration that occurs by 5.13×105 r/min.

运用该方法得出转镜镜面变形量、内部应力分布和振动模态参量的定量数值：在边缘线速度600 m/s下，三面体铍转镜的最大变形量为约0.334 6 μm；最大应力0.204 GPa，位于轴孔附近并与镜面距离最短处；两个在互相垂直平面内的一阶弯曲振动模态发生在3.4×105 r/min附近，一阶扭振点位于5.13×105 r/min附近，两个二阶弯曲振动点位于6.6×105 r/min附近。

The strength of rock material has the characteristics of random distribution. Combined with Mohr′s criteria, theory result is acquired to analyse the variation in strength of rock material by use of damage mechanics. By comparing this theory result with a group of experiment data on Carrara marble, it is shown that the damage mechanics model is suitable for describing the constitute property of rock material.

首先论述岩石材料强度的概率统计特性，结合经典的莫尔准则，利用损伤力学理论分析了岩石强度随围压的变化，给出了三轴应力状态下的岩石本构关系的表达式，并与Carrara大理岩在各种围压下的应力-应变曲线进行对比。

The test object was remolded soil after K0 consolidation. Using advanced stress path triaxial system, STDTTS+UNSAT (7kN/1700 kPa) produced by GDS of UK, the effect of stress path circumgyration on shear modulus and the trend of shear modulus along with variation of shear strain under small strain were studied. Some conclusions were drawn.

以重塑土经K0固结形成的试样为试验对象，采用英国GDS公司生产的STDTTS+UNSAT (7kN/1700 kPa)型号高级应力路径三轴测试系统，研究了在小应变范围内应力路径旋转对土体剪切模量的影响以及剪切模量随应变变化的趋势。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。