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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Autores principales:	YONGHUI PARK, LEE CHANGWOO, KIM DONGWOOK
Formato:	article
Lenguaje:	EN
Publicado:	Alma Mater Publishing House "Vasile Alecsandri" University of Bacau 2019
Materias:	hydraulic servo system mathematical model natural frequency and mode dynamic characteristics structural disequilibrium Technology T Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/acee0d28eaab42608a55ce72731f512a
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spelling	oai:doaj.org-article:acee0d28eaab42608a55ce72731f512a2021-12-02T19:49:54ZVIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEM10.29081/jesr.v25i2.332068-75592344-4932https://doaj.org/article/acee0d28eaab42608a55ce72731f512a2019-06-01T00:00:00Zhttp://www.jesr.ub.ro/1/article/view/33https://doaj.org/toc/2068-7559https://doaj.org/toc/2344-4932 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. YONGHUI PARKLEE CHANGWOOKIM DONGWOOKAlma Mater Publishing House "Vasile Alecsandri" University of Bacauarticlehydraulic servo systemmathematical modelnatural frequency and modedynamic characteristicsstructural disequilibriumTechnologyTEngineering (General). Civil engineering (General)TA1-2040ENJournal of Engineering Studies and Research, Vol 25, Iss 2 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	hydraulic servo system mathematical model natural frequency and mode dynamic characteristics structural disequilibrium Technology T Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	hydraulic servo system mathematical model natural frequency and mode dynamic characteristics structural disequilibrium Technology T Engineering (General). Civil engineering (General) TA1-2040 YONGHUI PARK LEE CHANGWOO KIM DONGWOOK VIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEM
description	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.
format	article
author	YONGHUI PARK LEE CHANGWOO KIM DONGWOOK
author_facet	YONGHUI PARK LEE CHANGWOO KIM DONGWOOK
author_sort	YONGHUI PARK
title	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_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_sort	vibrational case study for the mold oscillator with hydraulic servo system
publisher	Alma Mater Publishing House "Vasile Alecsandri" University of Bacau
publishDate	2019
url	https://doaj.org/article/acee0d28eaab42608a55ce72731f512a
work_keys_str_mv	AT yonghuipark vibrationalcasestudyforthemoldoscillatorwithhydraulicservosystem AT leechangwoo vibrationalcasestudyforthemoldoscillatorwithhydraulicservosystem AT kimdongwook vibrationalcasestudyforthemoldoscillatorwithhydraulicservosystem
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VIBRATIONAL CASE STUDY FOR THE MOLD OSCILLATOR WITH HYDRAULIC SERVO SYSTEM

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