钢

Then it uses beam unit to analyze and calculate the simplified tripper steel structure model,compares the pre and post optimization models stress,displacem...

然后利用梁单元对简化的空间尾车钢结构模型进行有限元静力和模态分析计算，对优化前后2种模型的应力、位移、重量及基频进行了比较，从而进一步验证了对尾车钢结构进行拓朴优化的可行性和优化结果的合理性。

By method of finite element calculation,parameter analysis of suspension bridge with steel truss girder are carried out.

本文基于有限元计算，探讨了主缆边中跨比、主缆垂跨比、加劲梁恒载大小以及中央扣等设计参数对钢桁梁悬索桥力学性能的影响，分析总结了上述设计参数与钢桁梁悬索桥强度和刚度的关系。

In view of the commonly used truss bridge in our country railway, the present thesis is the result of the efforts devoted to analysis the vehicle-curved steel truss bridge coupling vibration.

针对我国铁路桥梁中常用的钢桁梁桥，本文深入探讨了曲线钢桁梁桥的车桥耦合，主要做了以下工作： 1。

To solve this problem, this paper simulated the metallurgical process of this tundish.

根据柳钢生产现场的实际需要，针对柳钢热轧板的这类质量缺陷，本文对该中间包冶金过程进行了模拟研究。

By studies of the continuous casting tundish systems in XinGang and MeiGang, similar results have been acquired.

在对新钢和梅钢板坯中间包的研究中，也获得了相似的结果。

Analysis on contact and connection behavior of casing thread joints shows that the performance of thread plays a important role on the connection between turnbuckle and steel rod.

通过对钢棒螺纹连接的接触有限元分析，发现螺牙性能对钢棒的连接性能有着重要的影响。

Therefore, the mechanical properties especially the toughness of TWIP steels can be improved by way of controlling its heat treatment process to increase the number of CSL boundaries in original structure.

CSL晶界对材料的抗晶间腐蚀、断裂和蠕变强度的提高均有有益的作用，因此，通过控制TWIP钢的热处理工艺来提高原始组织中特殊晶界的含量，可以提高TWIP钢的强韧性。

The investigation of the solution treatment of hot-rolled TWIP steel of three different compositions (Fe-25Mn-4Si-2Al, Fe-30Mn-4Si-2Al and Fe-30Mn-3Si3Al) revealed that prolonging the temperature holding time can increase the elongation with no obvious change found in strength.

对3种不同成分的TWIP钢(Fe-25Mn-4Si-2Al， Fe-30Mn-4Si-2Al， Fe-30Mn-3Si-3Al)进行热轧后的热处理实验，结果表明，增加固溶处理的保温时间，可提高TWIP钢的延伸率，而强度的变化并不明显。

The dynamic tensile tests are carried out on the pneumatic indirect bar-bar tensile impact tester. The influence of strain induced austenite transformation and deformation twins on the mechanical properties and fracture behaviors of the studied TWIP steels are investigated using LOM, XRD, SEM and TEM techniques.

动态拉伸试验在气动式间接杆杆型冲击拉伸试验机上进行，采用LOM、XRD、SEM和TEM等手段分析研究了奥氏体的形变诱发相变和形变孪晶对TWIP钢力学性能的影响，并分析了TWIP钢的断裂行为。

The fracture mechanism of totally austenite TWIP steel (steel 5#) is: the moving of dislocations is blocked by twin boundary during deformation. Micro-voids nucleate at boundary of deformation twins by the interaction between deformation twins and dislocations. Micro-voids are formation, growth, coalescence and break by the stress concentration during deformation.

全奥氏体的TWIP钢（如5＃钢）的断裂机制为：形变过程中位错的运动受孪晶界的阻碍，形变孪晶与位错的交互作用使微孔形核于孪晶界处，应力集中使微孔长大、聚合直至材料发生断裂。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。