| 正弦波激励下刚性开孔结构内压响应特性实验 |
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| 引用本文： | 余世策,李庆祥,俞海峰,吕江,王彤.正弦波激励下刚性开孔结构内压响应特性实验[J].气动实验与测量控制,2011(5):16-20. |
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| 作者姓名： | 余世策 李庆祥 俞海峰 吕江 王彤 |
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| 作者单位： | [1]浙江大学建筑工程学院,杭州310058 [2]广东省建筑科学研究院,广州510500 |
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| 基金项目： | 国家自然科学基金（50908208）; 浙江省大学生新苗人才计划（2009R40G2010073）联合资助 |
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| 摘 要： | 利用声音振动发生原理研制了专门用于内压机理研究的实验装置,对单一开孔的刚性结构在正弦波气压激励下的内压动力特性进行了多参数对比实验。实验研究结果表明：开孔结构在外部动压力作用下会发生腔体共振,随开孔面积增大,腔体共振频率增大阻尼比减小;随孔口深度及内部容积增大,腔体共振频率减小阻尼比增大;对于深宽比很小且开孔面积相同的孔口,孔口形状对腔体共振频率影响不大,对阻尼比有一定影响。
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| 关 键 词： | 刚性结构 开孔 内压 正弦波 |
Experiment of internal pressure response characteristics excited by sinusoidal external pressure for rigid structure with opening |
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| Authors: | YU Shi-ce LI Qing-xiang YU Hai-feng L Jiang WANG Tong |
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| Institution: | 1.College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China; 2.Guangdong Provincial Building Research Institute,Guangzhou 510500,China) |
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| Abstract: | A special experimental device was developed for researching internal pressure mechanism by using principle of sound vibrations,and the multi-parameter comparative experiments were conducted to study the internal pressure response characteristics for rigid structure with single opening excited by sinusoidal external pressure.Experimental results show that cavity resonance occurs for structure with opening excited by dynamic external pressure.With the opening area increasing,the cavity resonance frequency increases and damping ratio decreases.With the orifice depth and internal volume increasing,the cavity resonance frequency decreases and the damping ratio increases.For the openings with small aspect ratio and the same opening area,orifice shape has little effect on the cavity resonance frequency but has some influence on damping ratio. |
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| Keywords: | rigid perforated structure opening internal pressure sinusoidal wave |
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