Research Experience and Activity

Principle Investigator, “Theory and Experimental Research of Linkages in order to improve its dynamic characteristics”, supported by National Natural Science Foundation of China (NSFC), Grant No. 59675004;

In this project，I developed a method for the vibration control of flexible linkages. By adjusting the length of the crank, the minimum end effector vibration deformation can be yielded. The experimental prototype of the linkages with variable length crank is designed. The experimental results agree with the theoretical one essentially and prove the feasibility of the theory.

Principle Investigator, “Dynamics analysis and Design of High-speed Elastic Planetary Gear”, supported by National Natural Science Foundation of China (NSFC), Grant No.50205019;

In this project, I developed the elastic dynamic model of high-speed planetary gear trains, in which many factors are taken into account, such as time-varying mesh stiffness, mesh error and flexibility of the ring gear. Sensitivities of dynamic performance to system parameters are analyzed in details. 

Co-PI, “Research on Modeling Method of Digital Prototyping Integrated Analysis and Application Study for Complex Mechanical System”, supported by National High Technology Research and Development Program ("863"Program) of China, Grant No. 2006AA04Z115;

A digital prototyping-based complex product integrated analysis system is put forward. Multi-dimensional research has been conducted on basic concept, technical frame, information model and formalization; integrated analyses have been constructed based on digital prototyping modeling, component analysis, multi- disciplinary cooperation optimization, and multi-phase performance analysis; basic theories of information, knowledge and process have been established to accomplish multi-level multi- disciplinary multi-phase analysis process.

Coordinating Investigator, “Research on cutting mechanism and layout of multiple cutting tools of boring machines”, supported by National Natural Science Foundation of China (NSFC), Grant No. 50975194;

In order to prolonging service life, improving cutting efficiency and the geology adaptability, the mechanism of cooperative cutting is researched and geological adaptive research of cutting tools layout is proposed by using the technical methods such as mechanics modeling, numerical simulation, experimental research techniques.

Coordinating Investigator, “Research on the Performance Evaluation Method on the Topological Structure of a Tunnel Boring Machine’s Cutter-Head”, supported by National Natural Science Foundation of China (NSFC), Grant No. 51275339;

The Tunnel Boring Machine (TBM) is widely used in the world while lacking research in China. For the lack of mature instruction from the performance evaluation theory of the TBM's Cutter-head topological structure, the parameters of machine, the rock properties and the machine operation do not match well with each other, which leads to the excessive and abnormal wear of the cutting tools and cutter-head, the high failure and the more energy consumption of the machine and the lower efficiency in boring, etc. This project aims at extracting mathematical description of the parameters of the cutter-head topology structure and the ground condition with Rough Set Theory, distinguishing the sophisticated coupling association among the multi-area parameters which decides the performance of the TBM cutter-head, establishing the mathematical models which describe the TBM dynamic performance and revealing the influence mechanism from topological structure of the cutter-head on the TBM performance under different ground conditions. Then, the evaluation index system is established with non-linear regression method. On this foundation, the calculation method of the evaluation index and the regulation method of machine's operational parameters are established, which finally constitute an exhaustive prediction & evaluation method of the cutter-head's topological structure performance. Finally, the results are verified and improved through lab experiment and practical engineering project. An integrated performance evaluation theory will be established, which provides theoretical support to the cutter-head design and the construction optimization. 

Principle Investigator, “Research on the bearing capacity of three-ring gear reducer”, supported by Nanjing precision gears Co., LTD China.

In the project, by considering the over-constraint characteristic of three-ring transmission and the coordinate condition of the mechanism's elastic deformation, the elastic static model aimed at force bearing analysis of three-ring reducer was established. And by the use of this model the force bearing condition of a certain typed three-ring reducer and the influence on its force bearing condition affected by the structural type and bearing rigidity of the three-ring reducer were analyzed.

Publications

1) Liu Jianqin, Zhang Ce, Dynamic Analysis of a Motor-Elastic Linkage System. Journal of Tianjin University. Vol.32, No.3, pp. 265-269, 1999

2) Liu Jianqin, Zhang Ce, Depression of Vibration of the Flexible Linkages by a Prescribed Input Voltage Function.. China Mechanical Engineering. Vol.10, No.8, pp. 850-852, 1999

3) Liu Jianqin, Zhang Ce, Summaries of Micro-motion Mechanisms. Mechanical Transmission. Vol.23, No.1, pp. 47-50, 1999 

4) Liu Jianqin, Wang Yuxin, Zhang Ce, Nonlinear Dynamic Analysis of High Speed Elastic Four-Bar Linkages. Design and Research of Machine. 1998, pp. 153-156 

5) Liu Jianqin, Zhang Ce, Kineto-Elastodynamics Analysis of a Linkage with a Variable Length Crank. Chinese Journal of Mechanical Engineering. Vol.36, No.4, pp. 41-44, 2000

6) Liu Jianqin, Zhang Ce, Zhang Xinhua, Wang Yuxin, Experimental Kineto-Elastodynamic Analysis of Linkages with a Variable Length Crank, 4rd International Symposium on Test/Measurement Technology, 2001, pp. 475-478，Shanghai

7) Liu Jianqin，Liang De, Zhang Ce, Measurement of Tracing Path of a Coupler-Point in an Elastic Linkage with a Length-Variable Crank, China Mechanical Engineering. Vol.13, No.6, pp. 512-515, 2002

8) Liu Jianqin， Zhang Ce, Refinement of generated path of elastic linkages by controlling length of crank,  Proceeding of the 2004 the Eleventh World Congress in Mechanism and Machine Science, Proceedings of the 2004 - the Eleventh World Congress in Mechanism and Machine Science, 2004, pp. 464-468

9) Liu JQ, Zhang C, A theoretical and experimental study on precision controlling of generated path of an elastic linkage,  PROGRESS ON ADVANCED MANUFACTURE FOR MICRO/NANO TECHNOLOGY 2005, PT 1 AND 2 MATERIALS SCIENCE FORUM 505-507: pp. 979-984，2006

10) Liu Jianqin，Zhang Ce, Elastic static force analysis of three-ring reducer, Journal of Machine Design, Vol.23, No.2, pp. 53-57, 2006

11) Wang Zhiyong, Liu Jianqin (Corresponding author), Guo Wei, Effects of Stitching on Composite Single-Lap Joints, Journal of Tianjin University. Vol.40, No.4, pp. 293-296, 2009

12) Liu Jianqin, Guo wei, Huang binqing, Yang yanan, Research of the relationship between the aperture ratio and the the fore-and-back pressure of the EPB shield cutter head, Journal of Tianjin University. Vol. 44, No.8, pp. 659~664, 2011

13) Puyi, Liu Jianqin, Guowei, Pei Ruiying. The study of cutting tool layout method of EPB Shield. Chinese Journal of Mechanical Engineering.  Vol.47, No.15, pp.161~168, 2011

14) Li N., Guo W. and Liu J.Q. The Prediction for EPB Shield Excavation Stability based on Geological Data，The 14th International Manufacturing Conference, October 13~15, 2011, Tianjin, China

15) Pu Y., JianQin Liu and Wei Guo. Kinematics Modeling & Analysis of TBM Disc Cutter Based on D-H Matrix. The 14th International Manufacturing Conference, October 13~15, 2011, Tianjin, China

16) X.G. Wang, W. Guo, J.Q. Liu, W.J. An ―Explicit Dynamics Simulation Research on Soil cutting of Shield Machine Based on LS-DYNA, The 14th International Manufacturing Conference, October 13~15, 2011, Tianjin, China

17)  Wang Xianyun, Liu Jianqin, Guo Wei., A Case-based Reasoning Combined with AHP wighting for Cutter Conceptual Configuration Prediction Model. 2nd International Conference on Advances in Materials and Manufacturing Processes (ICAMMP 2011), 2011/12/16-2011/12/18, p1919-1924, Guillin, PEOPLES R CHINA, 2012. Conference Paper

18)   Zhao, D, Liu, J.Q, Guo, W.,(Zhao, D),The simulation of cutter-rock interaction in PFC , Applied Mechanics and Materials, Progress in Civil Engineering,China , P170-173:3385-3389

19) Liu Jianqin, Liu Mengmeng, Guo Wei, Wang Lei. Critical problems analysis of performance evaluation of cutterhead’s structure of Tunnel Boring Machine[J]. Modern Tunnelling Technology, 2014,V51(2): 5-10 (EI 20142317795826）

20) Liu Jianqin, Zhang Bin, Guo Wei, Wang Lei. Numerical analysis on rotary rock breaking performance of TBM disc cutter[J].Journal of Shenyang University of Technology[2013-11-13] http://www.cnki.net/kcms/detail/21.1189.T.20131113.0835.015.html

21) Liu Jianqin, Liu Mengmeng, Guo Wei. Study on Rock Fracture Mechanism by Disc Cutters Using the SPH Method[C]. Proceedings of 2014 IFToMM Asian Conference on Mechanism and Machine Science, July 9–10, 2014, Tianjin, China 

22) Liu Jianqin, Ren Jiaobao, Guo Wei. Trust Thrust and Torque Characteristics Based on A New cutter-head Load Model [C]. Proceedings of 2014 IFToMM Asian Conference on Mechanism and Machine Science, July 9–10, 2014, Tianjin, China 

23) Wei Guo • Jing Hu • Jianqin Liu（通讯作者）.  The scheme design for the earth pressure balance shield cutterhead structure. Chinese Science Bulletin.  2014, 59(33): 4589–4599，（SCI AS5PD）

24) 刘建琴，刘蒙蒙，郭伟。硬岩掘进机盘型滚刀回转破岩仿真研究，机械工程学报，2015，Vol.51, No.9, P199-205, EI 20152200887618 

25) Liu Jianqin，Ren Jiabao，Guo Wei. Thrust and Torque Characteristics Based on a New cutter-head Load Model, CHINESE JOURNAL OF MECHANICAL ENGINEERING, 2015,Vol.28, No.4, P801-809, SCI

26)  Jianqin  Liu, Dechang qin, Wei Guo,  Research on Cutter Layout Based on the Load Analysis,文章信息/Info

 天津大学学报，2016,49（1）28-34

Patents

1）GuoWei, Sun Yuehai, Liu Jianqin. Waster mixing device of shield machine cutter head, invention patent. The patent number: ZL200810154063.7

2）Liu Jianqin Wang Lei, Huang Bingqing. Aptability cutter head for shield machine, invention patent. The patent number. ZL201010031345.5

3）Zhao Duo, Liu Jianqin, Guo wei, Wang Lei, An Weijing. A cutter used for shield machine tunnelling. Utility model patent. The patent number: ZL 201120075334.7

4) Zhao Duo, Liu Jianqin, Guo wei, Wang Lei, An Weijing. A center cutter with replaceable blades used for shield machine. Invention patent. The patent number: ZL 201110068134.3

5) Jiang Congjian, Guo Wei, Liu Jianqin. A new mounting structure for disc cutter on TBM. Invention patent. The patent number: ZL201110157397.1

6) Zhang Bin, Liu Jianqin, Guo Wei, Wang Lei. A testing device for TBM cutter wear. Invention patent. The patent number: ZL201310111123.8

7) Liu Mengmeng, Liu Jianqin, Guo Wei, Jiang Congjian, Zhao Duo. Double ring radial plate cutter-head for earth pressure balance machine. Invention patent. The patent number: ZL201210157262.X

8) Liu Mengmeng, Liu Jianqin, Guo Wei, Jiang Congjian, Zhao Duo. Double ring radial plate cutter-head for  earth pressure balance machine. Utility model patent. The patent number: ZL201220226959.3

9) Liu Jianqin, Yang Yanan, Zhang Bin, Guo Wei, Wang Lei, Jiang Congjian. A device of drilling and milling type for breaking wall. Invention patent. The patent number: ZL201210342594.5

10) Ren Jiabao, Liu Jianqin,Guo Wei, Liu Mengmeng, Zhang Bin. A Adjustable structure of installation height for TBM cutter . Utility Model Patent. The patent number: ZL201320583067.3

11) Qin Dechang, Liu Jianqin, Guo Wei, Liu Mengmeng, Zhang Bin. A on-line testing device for disc cutter wear of hard rock tunnel boring machine. Utility model patent. The patent number: ZL201320622026.0

12) Ren Jiabao, Liu Jianqin,Guo Wei,Liu Mengmeng, Zhang Bin. A Adjustable structure for cutter‘s inatallation on full face rock tunnel boring machine. Invention patent. The patent number:  201310430384.6

13) Qin Dechang, Liu Jianqin, Guo Wei, Liu Mengmeng, Zhang Bin.A on-line testing device for disc cutter wear of hard rock tunnel boring machine. Invention patent. The patent number: 201310467590.4