Experimental Investigation of Thermal Modal Characteristics for a Ship’s Foundation under 300°C
How to further reduce vibration and noise is a major challenge for modern ship design. High-temperature environment will significantly influence the mechanical properties (such as elastic modulus and stiffness) of the ship’s foundation. These properties will have a serious impact on the inherent vib...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/2714930 |
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| _version_ | 1832563881761832960 |
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| author | Zheyu Ding Hongbai Bai Yiwan Wu Yue Zhu Yichuan Shao |
| author_facet | Zheyu Ding Hongbai Bai Yiwan Wu Yue Zhu Yichuan Shao |
| author_sort | Zheyu Ding |
| collection | DOAJ |
| description | How to further reduce vibration and noise is a major challenge for modern ship design. High-temperature environment will significantly influence the mechanical properties (such as elastic modulus and stiffness) of the ship’s foundation. These properties will have a serious impact on the inherent vibration characteristics of the foundation. In this paper, a simplified foundation is taken as the research object, and a thermal-vibration joint test system is developed for investigating the thermal modal characteristics of the foundation under different temperatures. The joint test system consists of a transient aerodynamic heating environment simulation system and a vibration excitation and acquisition system. Finite element method (FEM) is used to analyze the distribution of thermal fields. The influence of the ceramic rods and the different ambient temperatures on the modal characteristics of the foundation is studied. The results indicate that the effect of ceramic rods on the modal characteristic of the foundation is negligible. The results also show that the greater the vibration response amplitude is as the temperature increases and the first-order natural frequency does not change, the smaller the second-order natural frequency and the damping ratio will become smaller. The variation of natural frequency and damping ratio of the foundation under different temperature conditions can provide a reliable experimental basis for the design of the vibration and noise reduction of the ship’s foundation in the thermal-vibration environment. |
| format | Article |
| id | doaj-art-ef6cc407ef1e4106a8f51ac9e6f550d6 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-ef6cc407ef1e4106a8f51ac9e6f550d62025-02-03T01:12:26ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/27149302714930Experimental Investigation of Thermal Modal Characteristics for a Ship’s Foundation under 300°CZheyu Ding0Hongbai Bai1Yiwan Wu2Yue Zhu3Yichuan Shao4Engineering Research Center for Metal Rubber, School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, ChinaEngineering Research Center for Metal Rubber, School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, ChinaEngineering Research Center for Metal Rubber, School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, ChinaEngineering Research Center for Metal Rubber, School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, ChinaEngineering Research Center for Metal Rubber, School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, ChinaHow to further reduce vibration and noise is a major challenge for modern ship design. High-temperature environment will significantly influence the mechanical properties (such as elastic modulus and stiffness) of the ship’s foundation. These properties will have a serious impact on the inherent vibration characteristics of the foundation. In this paper, a simplified foundation is taken as the research object, and a thermal-vibration joint test system is developed for investigating the thermal modal characteristics of the foundation under different temperatures. The joint test system consists of a transient aerodynamic heating environment simulation system and a vibration excitation and acquisition system. Finite element method (FEM) is used to analyze the distribution of thermal fields. The influence of the ceramic rods and the different ambient temperatures on the modal characteristics of the foundation is studied. The results indicate that the effect of ceramic rods on the modal characteristic of the foundation is negligible. The results also show that the greater the vibration response amplitude is as the temperature increases and the first-order natural frequency does not change, the smaller the second-order natural frequency and the damping ratio will become smaller. The variation of natural frequency and damping ratio of the foundation under different temperature conditions can provide a reliable experimental basis for the design of the vibration and noise reduction of the ship’s foundation in the thermal-vibration environment.http://dx.doi.org/10.1155/2019/2714930 |
| spellingShingle | Zheyu Ding Hongbai Bai Yiwan Wu Yue Zhu Yichuan Shao Experimental Investigation of Thermal Modal Characteristics for a Ship’s Foundation under 300°C Shock and Vibration |
| title | Experimental Investigation of Thermal Modal Characteristics for a Ship’s Foundation under 300°C |
| title_full | Experimental Investigation of Thermal Modal Characteristics for a Ship’s Foundation under 300°C |
| title_fullStr | Experimental Investigation of Thermal Modal Characteristics for a Ship’s Foundation under 300°C |
| title_full_unstemmed | Experimental Investigation of Thermal Modal Characteristics for a Ship’s Foundation under 300°C |
| title_short | Experimental Investigation of Thermal Modal Characteristics for a Ship’s Foundation under 300°C |
| title_sort | experimental investigation of thermal modal characteristics for a ship s foundation under 300°c |
| url | http://dx.doi.org/10.1155/2019/2714930 |
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