| 梁长对悬臂梁振动测定材料动弹性模量的影响 |
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| 引用本文： | 吕家才,周春天,刘明明,孙小鹏.梁长对悬臂梁振动测定材料动弹性模量的影响[J].河海大学学报(自然科学版),2006,34(5):561-563. |
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| 作者姓名： | 吕家才 周春天 刘明明 孙小鹏 |
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| 作者单位： | 河海大学水利水电工程学院,江苏,南京,210098 |
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| 摘 要： | 由悬臂梁振动测定材料动弹性模量的方法,受梁长与梁高比值的影响较为明显.选用有机玻璃和聚丙烯塑料2种材质,进行由悬臂梁振动测定材料动弹性模量试验.试验结果表明,只有当梁长大于或等于5倍梁高时,这种影响才可忽略不计.同时,当梁长大于或等于3倍梁宽时,对悬臂梁振动测定材料动弹性模量的影响不明显.
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| 关 键 词： | 悬臂梁 振动试验 动弹性模量 |
| 文章编号： | 1000-1980（2006）05-0561-03 |
| 收稿时间： | 2005-04-25 |
| 修稿时间： | 2005-04-25 |
Effect of beam length on determination of dynamic elastic modulus of materials by means of cantilevel beam method |
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| L Jia-cai,ZHOU Chun-tian,LIU Ming-ming,SUN Xiao-peng.Effect of beam length on determination of dynamic elastic modulus of materials by means of cantilevel beam method[J].Journal of Hohai University (Natural Sciences ),2006,34(5):561-563. |
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| Authors: | L Jia-cai ZHOU Chun-tian LIU Ming-ming SUN Xiao-peng |
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| Institution: | College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | When the vibration test of cantilever beam samples is used for measurement of dynamic elastic modulus of materials,the influence of the ratio of beam length to beam height on the measured result can not be ignored.The measurement of the dynamic elastic modulus of two kinds of materials,i.e.organic glass and polypropylene plastic,with this method shows that the influence of the ratio can be neglected if the beam length is equal to or more than 5 times of the beam height,and that the influence of the ratio on the measured result is insignificant if the beam length is equal to or more that 3 times of the beam width. |
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| Keywords: | cantilevel beam vibration test dynamic elastic modulus |
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