外文翻譯--關(guān)于船閘閘門的結(jié)構(gòu)動力特性的研究（原文）

1、 In Situ Structural Dynamic Behavior of Gate in Ship Lock Shanshan Wang1, Long Huang2, Ling Qiu1 1Department of Engineering Mechanics, Hohai University, Nanjing, Jiangsu 210098, P.R. China 2 Port and Channel Department,

2、Jiangsu Provincial Communication Planning and Design Institute, Nanjing, Jiangsu 210000, P.R. China wss@hhu.edu.cn; hlong0223@vip.sina.com; qiuling@hhu.edu.cn Abstract The structural dynamic behavior is becoming increasi

3、ngly important in order to determine the structural optimization design. Maintaining safety and integrity of the structures require a better understanding of structural dynamic properties and response. In this study, i

4、n situ test is conducted to inspect the structural dynamic behavior of gate in ship lock. The real ship is used to crash against the gate to make structural vibration. Using the free vibration response to obtain structu

5、ral dynamic properties provides the foundation of structural optimization design. The special fender is used as collision protection system of the gate. The test results show that the vibration amplitude changes greatl

6、y between gates with and without the fender. The vibration amplitudes of gate with fender are less than the one without fender. Based on the in situ vibration test conducted, it is concluded that the installation of fend

7、er as collision protection device is an effective method to make the gate in ship lock safer. Keywords: Dynamic behavior; Ship lock; Gate; fender; Vibration; Collision INTRODUCTION The mitre gate has been widely used in

8、the ship lock. Besides the normal operational loads, the gate is subjected to unexpected incidents including sudden loads such as collision of the ship. The structural dynamic behavior is becoming increasingly important

9、in order to determine the structural optimization design. Maintaining safety and integrity of the structures require a better understanding of structural dynamic properties and response. In order to reasonably design th

10、e gate and increase the safety of the gate in ship lock, the in situ test of the structural dynamic behavior of gate in ship lock is conducted. In this paper, the real ship is used to crash against the gate in Liulaojia

11、n ship lock to make structural vibration. Using the free vibration response to obtain structural dynamic properties provides the foundation of structural optimization design. At the same time, the dynamic responses of g

12、ate with and without the fender are also detected so as to show the affection of collision protection system of the gate. 567Earth and Space 2010: Engineering, Science, Construction,and Operations in Challenging Enviro

13、nments © 2010 ASCEDownloaded 25 Mar 2012 to 58.20.15.133. Redistribution subject to ASCE license or copyright. Visit http://www.ascelibrary.orgcollision avoidance system to protect ocean engineering structural such

14、as jetty[1-2], offshore platform[3] and so on. However, few works are available to evaluate the effect of fender used in the mitre gate. In the present study, the dynamic response between gates with and without the fende

15、r is investigated through an experimental investigation of a real mitre gate. The objectives of the experimental study are to validate that the installation of fender as collision protection device is an effective metho

16、d to make the gate in ship lock safer. The installation of fender on the gate in ship lock is shown in Fig. 3. Fig. 3. The installation of fender on the gate in ship lock When the real ship is used to crash against the

17、gate to make structural vibration, the mitre gate in ship gate is keeping the opening condition. The velocity of ship for every collision is invariable (0.1 m/s) and collision position is also invariable. In this study,

18、five cases of the different collision conditions with different collision angle between ship and mitre gate are experimentally investigated: (A) 5°; (B)10°; (C) 15°; (D) 20°and (E) 25°. The colli

19、sion vibration responses are measured using acceleration transducers and strain gauges. A conceptual sketch of acceleration transducers arrangement is illustrated in Fig. 4. and strain gauges in Fig. 5. 4 53 2 1Fig. 4.