| 风沙流对生物结皮的冲击破坏研究 |
| Alternative Title | A Study On The Failure Of The Biological Soil Crust Blown By Wind Sand Flux
|
| 陶照堂 |
| Thesis Advisor | 谢莉
|
| 2012-05-24
|
| Degree Grantor | 兰州大学
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| Place of Conferral | 兰州
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| Degree Name | 硕士
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| Keyword | 生物结皮
粒径
密度
含水率
碰撞时间
静荷载
动荷载
频率
简支板
破坏
|
| Abstract | 生物结皮在干旱和半干旱的荒漠化和沙化地区有较高的覆盖度，对防沙治沙工程有重要的作用。本文对生物结皮的粒径、密度、含水率、抗压强度等性质做了初步测量。计算了沙子的对心碰撞、粒床碰撞和沙子冲击生物结皮的碰撞时间。最后将生物结皮简化为简支板模型，研究了生物结皮的固有频率，分析了风沙流对生物结皮的冲击破坏作用。 |
| Other Abstract | The biological soil crust(BSC) has a very high coverage in arid and semi-arid desertification areas, which plays an important ecological function in wind-sand engineering. Firstly, the particle size, density, moisture content and compress strength of the BSC were measured. And the failure of the BSC impacted by wind sand flux was observed in the wind tunnel. Secondly, according to the elastic collision theory, combined with the Hertz assumption, the collision time of the collision of sand-sand, the collision of grain-bed and the collision of sand-BSC are calculated. Lastly, taken the BSC as the simply supported plate model, the natural frequency of the BSC is analysed.And the failure of the BSC impacted by wind sand flux is analysed. |
| URL | 查看原文
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| Language | 中文
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| Document Type | 学位论文
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| Identifier | https://ir.lzu.edu.cn/handle/262010/226522
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| Collection | 土木工程与力学学院
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Recommended Citation
GB/T 7714 |
陶照堂. 风沙流对生物结皮的冲击破坏研究[D]. 兰州. 兰州大学,2012.
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