装料工

Based on the work flow of charging equipment, three worst work conditions of the clack box were defined. Then, based on thermal-structure coupled theory, the thermal-structure coupled of the clack box which suffered from mechanical and temperature load was analyzed using the powerful software ANSYS. The clack box's temperature field and stress field as well as the stress spectrum of danger area in actual working condition were obtained. Finally, based on crack initiation and crack extension theory, the clack box's fatigue life was predicted.

摘 要：根据装料设备的工作流程，确定阀箱3种最不利的载荷工况；基于热－结构耦合理论并利用有限元分析软件ANSYS研究阀箱在温度载荷和机械载荷作用下的热－结构耦合问题，得到实际工况下阀箱的温度场、应力场以及危险部位的应力谱；依据裂纹萌生和扩展理论对阀箱进行疲劳寿命预测。

The development of travelling trestle bridge fabrication machine in China was reviewed. Bridge fabrication machines were classified according to PC box girder's position in travelling trestle. A comparison was made between two construction methods: precast girder assembly method and cast\|in\|situ method.

我国移动支架造桥技术的进展预应力混凝土梁的施工有架桥机架设、顶推架设、悬臂灌筑、悬臂拼装、造桥机造梁等几种方法，各有其适用范围，而采用造桥机架梁系墩顶原位造梁，跨度、墩高适用范围广，不影响桥下交通，梁施工时的状态与运营工况一致，且省工省料，建造速度快，梁既可工厂化分节预制，也可在模架上整孔现浇。

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。