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| 1 | Load-sharing Characteristic of Multiple Pinions Driving in Tunneling Boring Machine显示文摘The failure of the key parts, such as gears, in cutter head driving system of tunneling boring machine has not been properly solved under the interaction of driving motors asynchronously and wave tunneling torque load. A dynamic model of multi-gear driving system is established considering the inertia effects of driving mechanism and cutter head as well as the bending-torsional coupling. By taking into account the nonlinear coupling factors between ring gear and multiple pinions, the influence for meshing angle by bending-torsional coupling and the dynamic load-sharing characteristic of multiple pinions driving are analyzed. Load-sharing coefficients at different rotating cutter head speeds and input torques are presented. Numerical results indicate that the load-sharing coefficients can reach up to 1.2-1.3. A simulated experimental platform of the multiple pinions driving is carried out and the torque distributions under the step load in driving shaft of pinions are measured. The imbalance of torque distribution of pinions is verified and the load-sharing coefficients in each pinion can reach 1.262. The results of simulation and test are similar, which shows the correctness of theoretical model. A loop coupling control method is put forward based on current torque master slave control method. The imbalance of the multiple pinions driving in cutter head driving system of tunneling boring machine can be greatly decreased and the load-sharing coefficients can be reduced to 1.051 by using the loop coupling control method. The proposed research provides an effective solution to the imbalance of torque distribution and synchronous control method for multiple pinions driving of TBM. | WEI Jing SUN Qinchao SUN Wei DING Xin TU Wenping WANG Qingguo | 2013 | Chinese Journal of Mechanical Engineering2013，26，3： | 7 |
| 2 | Acta Polymerica显示文摘 | Zhu Shenmin Wang Wenxin Tu Wenping | 1999 | 50(7):267-2691999，50，7： | 1 |
| 3 | Optimal sampling of parametric surfaces显示文摘 | Li Yufei Wang Wenping Tu Changhe | 2012 | Computer-Aided Design & Applications2012，9，1： | 1 |
| 4 | GROWTH OF SOLUTIONS OF DIFFERENTIAL EQUATIONS WITH FINITE ORDER ENTIRE COEFFICIENTS显示文摘In this paper,we investigate the complex oscillation of some nonhomogeneous equations with finite order transcendental coefficients.Under some conditions we prove that all solutions of these equations are entire functions.Among those solutions, some are of infinite order of growth while some are of finite order of growth. | Tu Jin Zheng Xiumin (Institute of Math.and Informations,Jiangxi Normal University,Nanchang 330022) Huang Wenping (Nanchang Military Academy,Nanchang 330103) | 2008 | Annals of Differential Equations2008，24，1： | 0 |
| 5 | Defining a highly conserved cryptic epitope for antibody recognition of SARS-CoV-2 variants显示文摘Dear Editor,In recent months,additional Omicron variants of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),including the BA.5 sublineage BF.7 and BQ.1.1 and the BA.2 linage recombination XBB,XBB.1.5 and XBB.1.16,have emerged following the BA.2 and BA.5 subvariants.Remarkably,BQ.1.1 and XBB showed substantial neutralization escape as compared with the previous variants,and have gradually become the dominant variants worldwide.1 These facts emphasize the urgency of identifying highly conserved SARS-CoV-2 epitopes,which would be essential for the design of universal vaccines and broadly neutralizing antibodies. | Aihua Hao Wenping Song Cheng Li Xiang Zhang Chao Tu Xun Wang Pengfei Wang Yanling Wu Tianlei Ying Lei Sun | 2023 | Signal Transduction and Targeted Therapy2023，8，8： | 0 |
| 6 | Application of surrogate models to stability analysis and transition prediction in hypersonic flows显示文摘To increase the efficiency and robustness of stability-based transition prediction in flow simulations, simplified methods are introduced to substitute direct stability analyses for rapid disturbance growth prediction. For low-speed boundary layers, these methods are mainly established based on self-similar assumptions, which are not applicable to non-similar boundary layers in hypersonic flows. The objective of this article is to investigate the application of surrogate models to stability analysis of non-similar flows over blunt cones, focused on parameterization of boundary-layer (BL) profiles. Firstly, correlations between BL edge and profile parameters are analyzed, along with self-similar flow parameters and discrete points on BL profiles, which present four groups of BL characteristic parameters. Secondly, using these parameters as inputs, surrogate models are built for disturbance growth prediction over an MF-1 blunt cone. Results show that, surrogate models using four BL edge parameters and a BL shape factor {Ue, Te, ρe, ηe, H12} for stability analysis can achieve comparable accuracy with those using 16 discrete BL profile parameters, which are more precise than those using merely self-similar parameters or BL edge parameters. Thirdly, the established surrogate models are validated by stability analysis and transition prediction over the MF-1 blunt cone in flight experiments at the instants of t = 17 s ~ 22 s. Compared with direct linear stability analyses, the mean relative error of predicted disturbance growth rates by surrogate models is 8.0% and the maximum relative error of N factor envelopes is 6.6%, which indicates feasible applications of surrogate models to stability analysis and transition prediction of non-similar boundary layers in hypersonic flows. | Han Nie Wenping Song Zhonghua Han Guohua Tu Jianqiang Chen | 2022 | Advances in Aerodynamics2022，4，1： | 0 |
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