Study of the Effect of Shape Processing of a Specimen on the Modal Properties
Study of the Effect of Shape Processing of a Specimen on the Modal Properties
复制标题
试件形状加工对模态性能影响的研究
DOI：
10.1007/978-3-030-46466-0_12
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Masami Matsubara
中科院分区：
文献类型：
--
作者：
Shozo Kawamura;Go Kikuchi;Masami Matsubara
在用有限元法进行结构动力设计时，必须事先确定结构构件的动力特性。特别是，实际复杂形状构件的阻尼特性有时被假定为与具有相同材料的简单形状构件的阻尼特性相同。由于阻尼特性往往成为频率的函数，因此能否将简单形状构件的动力特性应用于复杂形状构件的动力特性是不确定的。本文采用钢制梁试件，对均匀形状试件和L形试件的模态特性进行了识别，并研究了形状加工对阻尼特性的影响。其结果是，可知阻尼特性在低频带中高，在高频带中常数低。此外，L形试样的阻尼性能在低频带高于均匀试样，而在高频带几乎相同。
When the dynamic design of a structure is carried out by using finite element method, the dynamic characteristics of the member of the structure have to be identified in advance. Especially, the damping property of the actual complex shaped member is sometimes assumed to be the same as the one of a simple shaped member with the same material. The damping properties often become a function of the frequency, so it is not certain whether we can apply the dynamic characteristics of the simple shaped member to the complex shaped one or not. In this study, a beam specimen made of steel is adopted, and the modal properties of both uniform shaped specimen and L-shaped one are identified; then the influence of the shape processing is investigated on the damping property. As a result, it is recognized that the damping property is high in the low-frequency band and low constant in the high-frequency band. Furthermore, the damping property of the L-shaped specimen is higher in the low-frequency band than the case of uniform specimen, while it is almost the same in the higher-frequency band.
试件尺寸和频率对梁结构阻尼性能影响的研究
影响因子：
4.4
作者：
S. Kawamura;M. Kita;M. Matsubara;T. Ise
通讯作者：
T. Ise