| 摘要: |
| 为实现太阳光能的高品位利用，设计了以抛物聚光器为聚光功能载体且配有双轴视日跟踪机构的碟式/斯特林热发电系统的机架结构.在机架承载和传力特性一致的基础上建立了机架的有限元模型，并基于数值风洞模拟的机架风载荷，计算得到了机架处于不同高度角时自重和风载作用的变形与应力分布，分析了机架承载的位移特性和薄弱位置的应力分布.结果表明，该机架在8级风载(17.1 m/s)作用时聚光器仍具有较好的几何“保型”能力，且在抗风运行以及12大风避险时结构均处于安全状态. |
| 关键词: 碟式聚光器 机架 风载荷 承载性能 有限元 |
| DOI： |
| 分类号:YK514;TH22 |
| 基金项目:国家自然科学基金资助项目(51275166)；湖南省高校产学研基金项目（11CY020）；湖南省科技计划项目（2012FJ6121）；湖南科技大学研究生创新基金项目(S130019) |
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| Frame bearing capacity mechanism of 38 kW sloardish string power system |
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Peng Youduo1，Yan Jian1，Yi Chenfei1，Xie Shangyu2, Yu Jiahuan11,2
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1 Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Xiangtan 411201, China;2. Military Agency Department,JiangLu Machinery Group, Xiangtan 411100, China
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| Abstract: |
| In order to improve the utilization of light energy,a frame structure was designed which consist of a parabolical concentrator and biaxial visual tracking institution used in the solar dish string power system. Based on the uniformity of frame bearing capacity and power transmission characteristics,the finite element model was built. Through numerical wind tunnel simulation, the wind load of the frame at different altitudes were obtained. The displacement characteristics and stress distribution at weak position of the frame structure were analyzed. Results indicated that the concentrator system has better ability in geometry shape. When running in the wind or facing hurricane ,the frame structure is safe. |
| Key words: dish concentrator frame structure wind load wind load ability finite element analysis |
