Vibration test and finite element analysis of a timber construction with curbwall: Vibration test and finite element analysis of a timber construction with curbwall

Author(s):  
Fangfang Qian ◽  
Weidong Lu ◽  
Weiqing Liu ◽  
Xiaowu Cheng ◽  
Depeng Lv ◽  
...  
2017 ◽  
Vol 59 (2) ◽  
pp. 183-187 ◽  
Author(s):  
Dong Lei ◽  
Rui Jiang ◽  
Pengxiang Bai ◽  
Feipeng Zhu

2006 ◽  
Vol 326-328 ◽  
pp. 851-854 ◽  
Author(s):  
Yoon Hyuk Kim ◽  
Chang Hwan Byun ◽  
Taek Yul Oh

In this study, the change of the natural frequencies in mouse femurs with osteoporosis was investigated based on a vibration test and a finite element. Three groups of the femurs include the osteoporotic group, the treated group and the normal group. In the vibration test, the natural frequencies were measured by the mobility test. For the finite element analysis, the micro finite element model of the femur was reconstructed using the Micro-CT images and the Voxel mesh generation algorithm. From the results, the averaged natural frequencies in the osteoporotic group were the highest, followed by those in the treated group. The finite element models were validated within 15% errors by comparing the natural frequencies in the finite element analysis with those in the vibration test. The developed Micro-CT system, the Voxel mesh generation algorithm, the presented finite element analysis, and vibration test could be useful for the investigation of the structural change of the bone tissue, and the diagnosis and the treatment in the osteoporosis.


2000 ◽  
Vol 43 (2) ◽  
pp. 21-25 ◽  
Author(s):  
Mike Raymond

Currently there is considerable debate over the relevance and adequacy of emerging vibration test methodologies. This paper details a controlled series of experiments designed to evaluate the nature and consistency of failures produced from several test methodologies including single-axis step stress, skewed-fixture step stress, pneumatic impact, and finite element analysis. Details regarding the test article, individual test methods, and a summary of conclusions are presented.


2011 ◽  
Vol 179-180 ◽  
pp. 787-792
Author(s):  
Qiang Cheng ◽  
Dong Sheng Xuan ◽  
Zhi Feng Liu

The dynamic performance of the worktable has a great influence on machining quality. In order to improve the machining precision, the paper conducts the analysis and research on the workability of a numerical control engine bed rotary worktable from a domestic machine tool factory,and discusses the influence of dynamic characteristics of rotary worktable on the precision of numerical control processing. Firstly Ansys finite element analysis was employed to analyze and simulate the modality and natural frequency of the numerical control rotary worktable under various steps. And then, a vibration test on the numerical control rotary worktable to confirm accuracy of the simulation parameters was carried on. Finally a contrast was made between the theoretical analysis and the experimental analysis to point out the resonance frequency and the distortion of the rotary worktable. Also the influence of numerical control rotary worktable on the numerical control processing was discussed.


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