Development of the estimation method of energy flow path inside the 3-dimensional structure using surface velocity data and finite element method

利用表面速度数据和有限元方法开发 3 维结构内部能量流路径估计方法

• 批准号: 10450034
• 负责人: UEHA Sadayuki
• 金额: $ 2.5万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450034/
• 关键词: structural intensity; Inverse problem; finite element method; noise control; Laser Doppler vibrometer; noise problem; vibration measurement; noise source identification

Many studies about structural intensity (SI) measurement, which is useful to know transmission paths of the vibration energy in a body, have been reported until now. Most of the works, however, have been done only for thin bodies, such as beams or plates because of the difficulty in measuring interior vibration distribution in thick structures. In this research, we propose a new SI measurement method applicable to thick bodies. The entire vibration distribution in the structure is calculated by dynamic analysis of finite element method (FEM) from the partial surface vibration data if the density, the sound velocity, sizes of a body under study and the locations of excitation and absorption are given apriori. The entire SI distribution can be estimated using the results. Based on this method, we have successfully carried several SI measurements for thick vibrating bodies. The merits of this method are as follows: (1) Only surface vibration data of the structure is needed to estimate the entire SI distribution. (2) It is applicable for arbitrary 3-D structures if the conditions mentioned above are satisfied apriori. In the research, the influence of the measurement error and the required number of the measurement data are also investigated.

结构强度的测量有助于了解振动能量在物体中的传递路径，迄今为止已有许多研究报道。然而，大多数的工作，已经做了，只是薄体，如梁或板，因为难以测量内部振动分布在厚结构。在这项研究中，我们提出了一种新的SI测量方法适用于厚体。在已知物体的密度、声速、尺寸以及激励和吸收的位置的前提下，利用有限元动力学分析方法，由部分表面振动数据计算出整个结构的振动分布。整个SI分布可以使用结果来估计。基于这种方法，我们成功地进行了几次厚振动体的SI测量。该方法的优点是：（1）只需结构表面振动数据即可估计整个SI分布。(2)只要先验地满足上述条件，它就适用于任意的三维结构。在研究中，测量误差的影响和所需的测量数据的数量也进行了研究。

项目成果

Y.Koike,C.Aramaki,K.Nakamura and S.Ueha: "FEM aided structural intensity measurement method and its application on thick bodies" Proceedings of Inter-Noise 98 (Christchurch,Bew Zealand). No.94-11 (1998)

Y.Koike、C.Aramaki、K.Nakamura 和 S.Ueha：“FEM 辅助结构强度测量方法及其在厚体上的应用”Inter-Noise 98 会议记录（新西兰基督城）。

Yoshikazu Koike, Chie Aramaki, Kentaro Nakamura and Sadayuki Ueha: "FEM aided structural intensity measurement method for thick body and its application"Proc. Inter-Noise 99 (in Christchurch). No. 94-11. (1998)

Yoshikazu Koike、Chie Aramaki、Kentaro Nakamura 和 Sadayuki Ueha：“厚体有限元辅助结构强度测量方法及其应用”Proc.

小池義和、平泉啓、中村健太郎、上羽貞行: "表面振動データと有限要素法を用いた肉厚構造物中の振動インテンシティ計測"VS Tech'99振動・音響新技術シンポジウム講演論文集. 73-76 (1999)

Yoshikazu Koike、Kei Hiraizumi、Kentaro Nakamura、Sadayuki Ueba：“使用表面振动数据和有限元方法测量厚壁结构的振动强度”VS Tech99 新振动和声学技术研讨会论文集 73 -76。 ）

Yoshikazu Koike, Kei Hiraizumi, Jun Sakai, Kentaro Nakamura and Sadayuki Ueha: "Finite element method aided power flow mapping of an ultrasonic vibration tool"Jpn. J. Appl. Phys.. Vol. 39-5B(to be published). (2000)

Yoshikazu Koike、Kei Hiraizumi、Jun Sakai、Kentaro Nakamura 和 Sadayuki Ueha：“超声波振动工具的有限元法辅助功率流映射”Jpn。

Kei Hiraizumi, Yoshikazu Koike, Kentaro Nakamura and Sadayuki Ueha: "Structural Intensity Measurement for a Complex Structure-Structural intensity measurement in a thick structure using surface vibration data and finite element method (IV)"Proc. Autumn Me

Kei Hiraizumi、Yoshikazu Koike、Kentaro Nakamura 和 Sadayuki Ueha：“复杂结构的结构强度测量 - 使用表面振动数据和有限元方法 (IV) 进行厚结构的结构强度测量”Proc。