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Archive of Advanced Engineering Science — Volume 51 (2019), Issue 1

Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-301
Title : Effects of the High In-situ Stress Level on the Acoustic Detection and the Damage Degree Evaluation of the Excavation Damage Zone
LIU Xiao, , YAN Peng, , LU Wenbo, , CHEN Ming, , WANG Gaohui, , NING Jinhua, , NI Shaohu, , LIU Jun,
Abstract : With the increasing depth of underground engineering, the accurate evaluation of the depth and the degree of excavation damage zone (EDZ) in deep rock engineering is gradually influenced by the high geostress field and it is important to assess the impact reasonably. Relying on the excavation of a deep diversion tunnel, the drilling plan of distressing the in-situ stress step by step was adopted. At the outer zone of sampling area, conventional sampling holes were drilled in the form of a circul
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-302
Title : Stiffness Identification and Dynamic Modeling of Machine Tool Bolt Joints Based on Response Surface Method
YANG Shanshan, , WANG Ling, , YIN Qin, , YIN Guofu,
Abstract : In order to analyze the effect of coupling relationship between joint stiffness parameters on the dynamic performance of machine tool bolt joints surface, a response surface method which is based on the theory of response surface statistics was proposed to fit the natural frequency of generalized modal states and the dynamic stiffness of the joints. In this method, the natural frequency was taken as the critical index to describe the object dynamic characteristics, with which the mathematic rela
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