【正文】 3HU Rufu, et al. Research on virtual dynamic optimization design本文只作為論文排版的參考模版，請勿轉載，謝謝！JOURNAL OF COAL SCIENCE amp。 ENGINEERING(CHINA) DOI pp 1–5 Mar. 2011Received: 26 June 2010 * Supported by the National Natural Science Foundation of China (50375026)。 the National Natural Science Foundation of China (50375028)Tel: 865768665140, Email: nghrf@ Research on virtual dynamic optimization design for NC machine toolsHU Rufu1,2, CUI Zhonghua1, CHEN Xiaoping1, SUN Qinghong21. School of Transportation and Traffic, Ningbo University of Technology, Ningbo 315016, China2. Department of Mechanical Engineering, Southeast University, Nanjing 210096, China 169。 The Editorial Office of Journal of Coal Science and Engineering (China) and SpringerVerlag Berlin Heidelberg 2011Abstract In order to obtain the distribution rules of abutment pressure around the 1151(3) fully mechanized topcoal caving (FMTC) face of Xieqiao Colliery, the KSEⅡ1 type borehole stress gauges were installed in the tailentry and headentry to measure the mininginduced stress. The distribution rules of the front and side abutment pressure were demonstrated. The results show that distribution rules of stress are obviously different in the vicinity of the face and entries. The peak value of abutment pressure in the protective coal pillar and face are located monly in front of the working face along the strike, and they are located at the stressdecreased zone near the face. There is no stress peak value in the lateral coal mass beside the headentry in front of the face on the strike, and the peak value of abutment pressure appears at the rear area of the face. There are stress peak values both in the protective coal pillar and in the lateral coal mass beside the headentry to the dip. Keywords fully mechanized topcoal caving face, abutment pressure, insitu measurementIntroductionConventional products development requires the processes of designing, trialmanufacture of the physi cal prototype, test, modification, retrialmanufacture, and so on. This causes long time consuming and high cost. With the rapid development of the puter technology and its widened application to mechanical engineering, new thought, new concept, and new mode of the advanced manufacture technology emerge in endlessly. The high technology, represented by puter technology and information technology, is playing an important role in the mechanical manufacturing. The products design and development are developing towards the direction of 3D and simulation (Xu et al., 2001). The main advantages of using 3D software to design and develop products are realtime judge of products crafts, products assembling, and products making. Because 3D designing software always adopts the characteristicbased parameterized modeling methods, so, it is very easy to modify the structure characteristics of 3D virtual parts, leading to meet requirements of products assembling, products making, and dynamic capability. By use of the virtual assembling technology, we can obtain 3D virtual prototype. And, through simulation analysis and interference inspection, we can modify and perfect designing schemes.The virtual optimization design of mechanical structure, based on puter modeling and th