Free Vibration Analysis of Hydraulic Quick Couplings Considering Fluid–Structure Interaction Characteristics
As an important component of the automatic hydraulic quick coupling device (AHQCD) on rescue vehicles, the hydraulic quick couplings (HQCs) are used to rapidly dock hydraulic lines and transport fluid while changing and operating hydraulic working tools. However, during tool operation at rescue site...
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MDPI AG
2024-12-01
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| Series: | Actuators |
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| Online Access: | https://www.mdpi.com/2076-0825/13/12/515 |
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| author | Yuchao Liu Fei Ma Xiaoguang Geng Songyuan Wang Zhihong Zhou Chun Jin |
| author_facet | Yuchao Liu Fei Ma Xiaoguang Geng Songyuan Wang Zhihong Zhou Chun Jin |
| author_sort | Yuchao Liu |
| collection | DOAJ |
| description | As an important component of the automatic hydraulic quick coupling device (AHQCD) on rescue vehicles, the hydraulic quick couplings (HQCs) are used to rapidly dock hydraulic lines and transport fluid while changing and operating hydraulic working tools. However, during tool operation at rescue sites, pressure pulsations at multiple frequencies in the hydraulic lines can coincide with the natural frequencies of the HQCs, potentially causing resonance that severely affects the stability of fluid conveying and damages the connection of hydraulic lines accidentally. To investigate the natural frequencies of the HQCs with upstream and downstream lines, the characteristics of fluid–structure interaction were considered between the poppets and the fluid in this study, and an equivalent stiffness model of the fluid domain was derived based on the fluid compressibility. A dynamic model, along with 6-DOF equations for the system, was established, and the natural frequencies and mode vectors were determined by free vibration analysis. In addition, the effects of working pressure, air content, and stiffness of the springs on the natural frequency of the HQC system were analyzed. The results show the natural frequency increases with a higher working pressure and lower air content, while the effect of spring stiffness on natural frequencies varies with different modes. Furthermore, the proposed model is validated by experimental pressure signals, showing good agreement, with an average error of 2.7% for the first-order natural frequency. This paper presents a theoretical method for improving the stability of fluid transport when operating various hydraulic tools under complex rescue conditions. |
| format | Article |
| id | doaj-art-f20dfcdf9fa146eebf334e42cab63da7 |
| institution | DOAJ |
| issn | 2076-0825 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Actuators |
| spelling | doaj-art-f20dfcdf9fa146eebf334e42cab63da72025-08-20T02:53:22ZengMDPI AGActuators2076-08252024-12-01131251510.3390/act13120515Free Vibration Analysis of Hydraulic Quick Couplings Considering Fluid–Structure Interaction CharacteristicsYuchao Liu0Fei Ma1Xiaoguang Geng2Songyuan Wang3Zhihong Zhou4Chun Jin5School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaAs an important component of the automatic hydraulic quick coupling device (AHQCD) on rescue vehicles, the hydraulic quick couplings (HQCs) are used to rapidly dock hydraulic lines and transport fluid while changing and operating hydraulic working tools. However, during tool operation at rescue sites, pressure pulsations at multiple frequencies in the hydraulic lines can coincide with the natural frequencies of the HQCs, potentially causing resonance that severely affects the stability of fluid conveying and damages the connection of hydraulic lines accidentally. To investigate the natural frequencies of the HQCs with upstream and downstream lines, the characteristics of fluid–structure interaction were considered between the poppets and the fluid in this study, and an equivalent stiffness model of the fluid domain was derived based on the fluid compressibility. A dynamic model, along with 6-DOF equations for the system, was established, and the natural frequencies and mode vectors were determined by free vibration analysis. In addition, the effects of working pressure, air content, and stiffness of the springs on the natural frequency of the HQC system were analyzed. The results show the natural frequency increases with a higher working pressure and lower air content, while the effect of spring stiffness on natural frequencies varies with different modes. Furthermore, the proposed model is validated by experimental pressure signals, showing good agreement, with an average error of 2.7% for the first-order natural frequency. This paper presents a theoretical method for improving the stability of fluid transport when operating various hydraulic tools under complex rescue conditions.https://www.mdpi.com/2076-0825/13/12/515hydraulic quick couplingautomatic hydraulic quick coupling devicefluid–structure interactionnatural frequencyrescue vehicles |
| spellingShingle | Yuchao Liu Fei Ma Xiaoguang Geng Songyuan Wang Zhihong Zhou Chun Jin Free Vibration Analysis of Hydraulic Quick Couplings Considering Fluid–Structure Interaction Characteristics Actuators hydraulic quick coupling automatic hydraulic quick coupling device fluid–structure interaction natural frequency rescue vehicles |
| title | Free Vibration Analysis of Hydraulic Quick Couplings Considering Fluid–Structure Interaction Characteristics |
| title_full | Free Vibration Analysis of Hydraulic Quick Couplings Considering Fluid–Structure Interaction Characteristics |
| title_fullStr | Free Vibration Analysis of Hydraulic Quick Couplings Considering Fluid–Structure Interaction Characteristics |
| title_full_unstemmed | Free Vibration Analysis of Hydraulic Quick Couplings Considering Fluid–Structure Interaction Characteristics |
| title_short | Free Vibration Analysis of Hydraulic Quick Couplings Considering Fluid–Structure Interaction Characteristics |
| title_sort | free vibration analysis of hydraulic quick couplings considering fluid structure interaction characteristics |
| topic | hydraulic quick coupling automatic hydraulic quick coupling device fluid–structure interaction natural frequency rescue vehicles |
| url | https://www.mdpi.com/2076-0825/13/12/515 |
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