| 摘要: |
| 针对水电站输水钢管向巨型化发展的现状，分析了加劲钢管临界失稳时的外压承载力及失稳形态与管径、壁厚、加劲环形状、尺寸、布置间距及材料的力学性能之间的关系，揭示了其外压承载力骤减的主要影响因素及其骤减区间，给出了合理的加劲环形状、尺寸及最有效布置间距，提出了钢管各部位外压稳定与强度安全协调一致的优化设计方案。 |
| 关键词: 水电站 输水钢管 外压失稳 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金项目(50079005) |
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| An optimized design project & principle analysis of losing stability on huge thin wall hydroelectric station penstock under external pressure |
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| Abstract: |
| The diameter of water conveyance steel tube becomes larger and larger.The paper analyzed the connection of bearing capacity of bracing steel tube critical losing stability and pattern under external pressure and steel tube diameter,wall thickness,bracing ring form,dimension,arrangement spacing and material mechanics capability,showed the main affecting factor of bearing capacity and range reducing very quickly under external pressure,presented reasonable shape,appropriate sizes and most efficient arrangement spacing of bracing ring,and put forward the optimized design project which ensures harmonizing and being identical of all the sections of steel tube stability under external pressure and intensity safe. |
| Key words: hydroelectric station water conveyance steel tube losing stability of external pressure |
