We have developed many types of transport boxes by origami-operation and space filling operation. But it has not been solved that the fruits, vegetables, strawberries, cells, blood and a bottle of liquor are damaged, broken during transportation. It is the greatest factor in this situation that there is a danger vibration frequency band where these are easy to scratch and are prone to death. If there are eigen frequencies within this danger frequency band, it needs that those eigen frequencies within this danger frequency band are moved out of the band. But it is difficult to apply the existing topology optimization methods using homogenization method or density method to control plural eigen frequencies for two reasons. One reason is that even if homogenization method or density method is used, finally after convergence, holes are made on finite elements of which the size of the homogenizing element or the thickness is smaller than the threshold by keeping the rest the original size. In such processing, there is a possibility that the converged solution again deviates from the convergence value. Another reason is that it is difficult to control plural eigen frequencies simultaneously because some eigen frequencies go up and some ones go down no matter where it is reinforced although displacement at any point goes down in static problem. Although in such way, it is very difficult to control plural eigen frequencies, here we propose a new high precision and high efficiency method for controlling plural eigen frequencies simultaneously using the kinetic energy density and the strain energy density.
Published in | International Journal of Mechanical Engineering and Applications (Volume 10, Issue 6) |
DOI | 10.11648/j.ijmea.20221006.12 |
Page(s) | 135-143 |
Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
Copyright |
Copyright © The Author(s), 2022. Published by Science Publishing Group |
Origami Engineering, Transportation Box, Topology Optimization, Density Method, Index of Generalized Eigen Frequency, Kinetic Energy Density, Strain Energy Density, Danger Frequency Band
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APA Style
Toshie Sasaki, Yang Yang, Ichiro Hagiwara. (2022). Proposition of a New High Speed and High Efficiency Control Method for Plural Eigen Frequencies by Changing Topology. International Journal of Mechanical Engineering and Applications, 10(6), 135-143. https://doi.org/10.11648/j.ijmea.20221006.12
ACS Style
Toshie Sasaki; Yang Yang; Ichiro Hagiwara. Proposition of a New High Speed and High Efficiency Control Method for Plural Eigen Frequencies by Changing Topology. Int. J. Mech. Eng. Appl. 2022, 10(6), 135-143. doi: 10.11648/j.ijmea.20221006.12
@article{10.11648/j.ijmea.20221006.12, author = {Toshie Sasaki and Yang Yang and Ichiro Hagiwara}, title = {Proposition of a New High Speed and High Efficiency Control Method for Plural Eigen Frequencies by Changing Topology}, journal = {International Journal of Mechanical Engineering and Applications}, volume = {10}, number = {6}, pages = {135-143}, doi = {10.11648/j.ijmea.20221006.12}, url = {https://doi.org/10.11648/j.ijmea.20221006.12}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20221006.12}, abstract = {We have developed many types of transport boxes by origami-operation and space filling operation. But it has not been solved that the fruits, vegetables, strawberries, cells, blood and a bottle of liquor are damaged, broken during transportation. It is the greatest factor in this situation that there is a danger vibration frequency band where these are easy to scratch and are prone to death. If there are eigen frequencies within this danger frequency band, it needs that those eigen frequencies within this danger frequency band are moved out of the band. But it is difficult to apply the existing topology optimization methods using homogenization method or density method to control plural eigen frequencies for two reasons. One reason is that even if homogenization method or density method is used, finally after convergence, holes are made on finite elements of which the size of the homogenizing element or the thickness is smaller than the threshold by keeping the rest the original size. In such processing, there is a possibility that the converged solution again deviates from the convergence value. Another reason is that it is difficult to control plural eigen frequencies simultaneously because some eigen frequencies go up and some ones go down no matter where it is reinforced although displacement at any point goes down in static problem. Although in such way, it is very difficult to control plural eigen frequencies, here we propose a new high precision and high efficiency method for controlling plural eigen frequencies simultaneously using the kinetic energy density and the strain energy density.}, year = {2022} }
TY - JOUR T1 - Proposition of a New High Speed and High Efficiency Control Method for Plural Eigen Frequencies by Changing Topology AU - Toshie Sasaki AU - Yang Yang AU - Ichiro Hagiwara Y1 - 2022/11/29 PY - 2022 N1 - https://doi.org/10.11648/j.ijmea.20221006.12 DO - 10.11648/j.ijmea.20221006.12 T2 - International Journal of Mechanical Engineering and Applications JF - International Journal of Mechanical Engineering and Applications JO - International Journal of Mechanical Engineering and Applications SP - 135 EP - 143 PB - Science Publishing Group SN - 2330-0248 UR - https://doi.org/10.11648/j.ijmea.20221006.12 AB - We have developed many types of transport boxes by origami-operation and space filling operation. But it has not been solved that the fruits, vegetables, strawberries, cells, blood and a bottle of liquor are damaged, broken during transportation. It is the greatest factor in this situation that there is a danger vibration frequency band where these are easy to scratch and are prone to death. If there are eigen frequencies within this danger frequency band, it needs that those eigen frequencies within this danger frequency band are moved out of the band. But it is difficult to apply the existing topology optimization methods using homogenization method or density method to control plural eigen frequencies for two reasons. One reason is that even if homogenization method or density method is used, finally after convergence, holes are made on finite elements of which the size of the homogenizing element or the thickness is smaller than the threshold by keeping the rest the original size. In such processing, there is a possibility that the converged solution again deviates from the convergence value. Another reason is that it is difficult to control plural eigen frequencies simultaneously because some eigen frequencies go up and some ones go down no matter where it is reinforced although displacement at any point goes down in static problem. Although in such way, it is very difficult to control plural eigen frequencies, here we propose a new high precision and high efficiency method for controlling plural eigen frequencies simultaneously using the kinetic energy density and the strain energy density. VL - 10 IS - 6 ER -