VIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEM
We have conducted sensitivity analysis to investigate the two-hydraulic-servo system for the mold oscillator. By modelling mathematical models for operating fluid flow to control a hydraulic cylinder, we changed design parameters and environment conditions including friction, additional spring stif...
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| Format: | Article |
| Language: | English |
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Alma Mater Publishing House "Vasile Alecsandri" University of Bacau
2019-06-01
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| Series: | Journal of Engineering Studies and Research |
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| Online Access: | https://jesr.ub.ro/index.php/1/article/view/33 |
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| author | YONGHUI PARK LEE CHANGWOO KIM DONGWOOK |
| author_facet | YONGHUI PARK LEE CHANGWOO KIM DONGWOOK |
| author_sort | YONGHUI PARK |
| collection | DOAJ |
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We have conducted sensitivity analysis to investigate the two-hydraulic-servo system for the mold oscillator. By modelling mathematical models for operating fluid flow to control a hydraulic cylinder, we changed design parameters and environment conditions including friction, additional spring stiffness and fluid leakage. From the one-hydraulic servo system to the two-hydraulic cylinder, modal analysis was conducted to figure out dynamic characteristics of the real system. Especially, we categorized important natural mode shape. When the system was excited into the natural frequency, the 1st mechanical natural frequency could cause a pressure gain by reducing internal pressure of a hydraulic cylinder, but other natural frequencies were critically dangerous by generating imbalance, over-vibration and distortion. By comparing the results to the experimental data, we could find a dramatic pressure drop near 3 Hz oscillation when the system has the 1st mechanical natural frequency 2.499 Hz. Also, the system has the imbalance near 6 Hz oscillation when the system has 2nd mechanical natural frequency 5.446 Hz. Based on these fact, we have suggested some tips to oscillate a mold efficiently and safely.
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| format | Article |
| id | doaj-art-0bbf347f2b80483288674f76ba665442 |
| institution | Kabale University |
| issn | 2068-7559 2344-4932 |
| language | English |
| publishDate | 2019-06-01 |
| publisher | Alma Mater Publishing House "Vasile Alecsandri" University of Bacau |
| record_format | Article |
| series | Journal of Engineering Studies and Research |
| spelling | doaj-art-0bbf347f2b80483288674f76ba6654422025-02-09T11:37:48ZengAlma Mater Publishing House "Vasile Alecsandri" University of BacauJournal of Engineering Studies and Research2068-75592344-49322019-06-01252VIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEMYONGHUI PARK0LEE CHANGWOO1KIM DONGWOOK2Department of Mechanical Engineering Mechanical System Major, Yuhan University, 590 Gyeongin-ro, Sosa-gu, Bucheon-si, Republic of KoreaAdvanced Fusion Technology Research Division, Pohang Institute of Metal Industry Advancement, 56 Jigok-ro Nam-gu, Pohang-si, Gyeongsangbuk-do, Republic of KoreaDepartment of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro Nam-gu, Pohang-si, Gyeongsangbuk-do, Republic of Korea We have conducted sensitivity analysis to investigate the two-hydraulic-servo system for the mold oscillator. By modelling mathematical models for operating fluid flow to control a hydraulic cylinder, we changed design parameters and environment conditions including friction, additional spring stiffness and fluid leakage. From the one-hydraulic servo system to the two-hydraulic cylinder, modal analysis was conducted to figure out dynamic characteristics of the real system. Especially, we categorized important natural mode shape. When the system was excited into the natural frequency, the 1st mechanical natural frequency could cause a pressure gain by reducing internal pressure of a hydraulic cylinder, but other natural frequencies were critically dangerous by generating imbalance, over-vibration and distortion. By comparing the results to the experimental data, we could find a dramatic pressure drop near 3 Hz oscillation when the system has the 1st mechanical natural frequency 2.499 Hz. Also, the system has the imbalance near 6 Hz oscillation when the system has 2nd mechanical natural frequency 5.446 Hz. Based on these fact, we have suggested some tips to oscillate a mold efficiently and safely. https://jesr.ub.ro/index.php/1/article/view/33hydraulic servo systemmathematical modelnatural frequency and modedynamic characteristicsstructural disequilibrium |
| spellingShingle | YONGHUI PARK LEE CHANGWOO KIM DONGWOOK VIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEM Journal of Engineering Studies and Research hydraulic servo system mathematical model natural frequency and mode dynamic characteristics structural disequilibrium |
| title | VIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEM |
| title_full | VIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEM |
| title_fullStr | VIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEM |
| title_full_unstemmed | VIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEM |
| title_short | VIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEM |
| title_sort | vibrational case study for the mold oscillator with hydraulic servo system |
| topic | hydraulic servo system mathematical model natural frequency and mode dynamic characteristics structural disequilibrium |
| url | https://jesr.ub.ro/index.php/1/article/view/33 |
| work_keys_str_mv | AT yonghuipark vibrationalcasestudyforthemoldoscillatorwithhydraulicservosystem AT leechangwoo vibrationalcasestudyforthemoldoscillatorwithhydraulicservosystem AT kimdongwook vibrationalcasestudyforthemoldoscillatorwithhydraulicservosystem |