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《Journal of Dalian University of Technology》 2001-06
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Undamaged detection of pipe based on modal varied quotiety of strain

REN Quan, LI Hong sheng, GUO Xing lin ( 1. Dept. of Eng. Mech., Dalian Univ. of Technol., Dalian 116024, China; 2. State Key Lab. of Struct. Anal. for Ind. Equip., Dalian Univ. of Technol., Dalian 116024, China )  
The modal analysis method is now being widely used in the undamaged detections of the engineering structures, with which the authors can analyze the pressure pipe′s damages. For the damaged analysis of the pipe by using the mode, the strain of the pipe at different locations can be presented as the mode function of the displacement according to the character of the one dimensional continuity and the cross section, whose varied quotiety can be used to identify the damage. Then the slight change of the stiffness caused by the damage can be simulated by numerical value and the damaged position can also be identified obviously by using this method.
【Fund】: 辽宁省科学技术基金资助项目 ( 0 0 2 0 6 9)
【CateGory Index】: TB123
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