Wang G.-C.,Zhengzhou University |
Li W.-S.,SIPPR Engineering Group Co.
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2016
A 3-dimensional model of a highway cable-stayed bridge with a long span and a vehicle spatial model with 9 degrees of freedom were respectively established according to finite element method and D'Alembert theory. The two subsystems of vehicle and bridge were coupled by compatible conditions of displacement and force to solve the vibration differential equations of the vehicle-bridge coupled system. The iterative calculation command stream to solve differential coupled vibration equations of vehicle-bridge systems was compiled in APDL language in ANSYS computer software. The method to evaluate the vehicle ride comfort was established according to the criteria in ISO2631-1-1997. The vehicle dynamic responses and ride comfort were analyzed considering different vehicle speeds and vehicle gravities when multiple vehicles crossed the Fujian Changmen cable-stayed bridge, which has a main span of 550 m. The calculations indicate that the dynamic responses of vehicles increase with increases in vehicle speed, making the ride less comfortable; the dynamic responses of vehicles decrease as vehicle gravity increases, making the ride more comfortable. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.
Shen Y.-G.,Kunming University of Science and Technology |
Guo Y.-B.,SIPPR Engineering Group Company Ltd |
Li W.-D.,Kunming University of Science and Technology
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | Year: 2014
Engine combustion and emissions characteristics were investigated on a single cylinder SI engine with variable compression ratio at different EGR rates (0-20%) and different compression ratios (8-11). Results show that, with the increase of EGR rate, ignition delay and combustion duration increase and the instantaneous peak heat release rate decreases and moves to later phase, consequently resulting in lower maximum cylinder pressure and combustion temperature. Ignition delay and combustion duration decrease with the increase of compression ratios, along with the increase in cylinder pressure and combustion temperature. NOx emissions reduce substantially with the increase of EGR rate. NOx reduction by 92% is achieved at 20% EGR rate at the compression ratio of 9. The emissions of CO and HC do not change significantly at low EGR rate, but decrease at high compression ratio. CO and HC reduced by maximum 7.8% and 27% respectively at EGR rate of 5%.
Zhang L.,Sippr Engineering Group Co. |
Wang Y.,Sippr Engineering Group Co. |
Jia Y.X.,Henan University
Applied Mechanics and Materials | Year: 2013
In the performance testing for diesel engine, the load of power testing mostly used water resistance. The power generated by diesel engine all consumed by water resistance. The power and water wasted mostly by this way. Base on the existing mechanical energy recovery system means that the system adopt generator dragged by prime motor to generate recycle electricity, this paper introduces variable current energy recovery system. The power voltage inverts to 10kV voltage, and connects the power plants to the grid. Research shows that the system is low cost, energy saving. And it is achieved the ideal effect in power quality and economic benefit. At present, our company cooperates with a locomotive works for design and construction this system and ancillary plant. © (2013) Trans Tech Publications, Switzerland.
Wang G.-C.,Zhengzhou University |
Li W.-S.,SIPPR Engineering Group Co.
Bridge Construction | Year: 2014
To study the effect of vehicle eccentric loading and vehicle spacing distances on the dynamic responses of cable-stayed bridge, the Changmen Bridge (a hybrid girder cable-stayed bridge with double pylons, double cable planes and with a main span of 550 m) in Fujian was taken as an example and was analyzed. Based on the finite element method and dynamic equilibrium principle, the mechanical models and vibration differential equations for the two subsystems of the vehicles and bridge were respectively built. On the principle that the compatible displacement conditions and dynamic interaactive forces of the subsystems were equivalent, the ANSYS was used to compile the APDL command stream for iterative calculation, the vibration differential equations for the vehicle-bridge system were solved and in consideration of the different eccentric loading degrees and spacing distances of the vehicles, the structural responses of the bridge were analyzed. The results of the analysis indicate that with the increase of the eccentric loading degree, the dynamic responses of the bridge increase on the whole, in which some of the individual indices may have certain fluctuation and randomness and with the increase of the vehicle spacing distance, the dynamic responses of the bridge decreases in general. ©, 2014, Wuhan Bridge Research Institute. All right reserved.
Liu Y.,China University of Petroleum - East China |
Li F.,SIPPR Engineering Group Co. |
Gong W.,Sinopec |
Li Z.,China University of Petroleum - East China
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013
Changes in human expression cause non-rigid deformation of face models, this is a great challenge for 3D Face Recognition. To tackle this problem, there has been lots of excellent research work in recent years. In this paper, we propose a face recognition algorithm based on intrinsic features. Firstly face models are preprocessed and adjusted to standard pose for extracting nose tip, then we compute several geodesic stripes based on detected nose tip, make sampling in each stripe, and extract isometric-invariant features on each feature point. Because facial expression makes different levels of impact on different parts of face surface, we use SVM to train the matching results between stripes, getting optimal weight for each stripe. Finally, similarities are computed by weighed sum of different stripes matching results. Our experiments use the Gavab Database and the results are better than other 3D face recognition algorithms such as MDS method, showing effectiveness of our method. © Springer International Publishing 2013.
Liu L.,Henan Institute of Engineering |
Li B.,SIPPR Engineering Group Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2015
The continuous heat treatment production line was designed according to the technical requirements of crankshaft. The heat treatment process, composition and control mode of the production line were described, and the process, heating furnace, cooling chamber and automatic control of the line were also introduced. Through field operation, it shows that the production line plays a significant role for energy saving and production efficiency improvement. © 2015, Chinese Mechanical Engineering Society of Heat Treatment. All right reserved.
Wang L.,Huazhong University of Science and Technology |
Wang L.,Henan University of Science and Technology |
Li H.,SIPPR Engineering Group Co. |
Zou X.,Huazhong University of Science and Technology |
Shen X.,Huazhong University of Science and Technology
Energy and Buildings | Year: 2015
Abstract This paper presents a new method based on a sensor network for designing a lighting control system for an industrial building. An illumination mapping between the work plane and the horizontal plane was derived for sensor placement to generate rules for sensor layout. Online sensor data sampling and a control center database with a real-time update algorithm were applied to lessen the effects of interference and luminous decay. We implemented the method for the lighting system of an industrial building in Xi'an, China. Skylights combined with artificial lighting were designed for daytime lighting. The optimized placement and a scene-control strategy for the artificial lighting system were generated by simulations with DIALux and Autodesk Ecotect Analysis. Daily lighting consumption data for August, 2014, demonstrated that the control system strategy realized lighting energy savings of up to an average of 80% on cloudy days. The design can be used as a reference for new industrial construction or retrofit applications. © 2015 Elsevier B.V.
Wang H.L.,Zhejiang University |
Sun X.Y.,Zhejiang University |
Peng Q.W.,Zhejiang University |
Xue F.,SIPPR Engineering Group Co.
Applied Mechanics and Materials | Year: 2013
The mechanical behaviors and durability of concrete containing steel slag powder (SSP), silica fume (SF) and fly ash (FA) were presented in this study. The fresh concrete properties, compressive strength, split tensile strength, elastic modulus, stress-stain curve, chloride permeability as well as carbonation of concretes mixed with different SSP contents or concretes containing compound mineral admixture were tested. The experimental results reveal that the mechanical behaviors and durability of concrete with 10% SSP replacing cement are both improved than that of the reference concrete. Mechanical behaviors and durability of concrete with 20% SSP replacing cement are similar to the reference concrete. Concrete with compound mineral admixture of SSP and SF obtain the highest enhancement in both strength and chloride resistance. © (2013) Trans Tech Publications, Switzerland.
Wu K.,Xi'an University of Architecture and Technology |
Wu K.,CAS Research Center for Eco Environmental Sciences |
Liu R.,CAS Research Center for Eco Environmental Sciences |
Li T.,Zhengzhou Water Supply Corporation |
And 3 more authors.
Chemical Engineering Journal | Year: 2013
This study investigated the elemental composition and distribution of the Fe-based backwashing sludge (FBBS), and studied its adsorption behaviors and mechanisms towards arsenite [As(III)]. The characterization results of EDS, XPS, and XRF corroborated that the valuable constituents within FBBS are ferric oxhydroxide (γ-FeOOH) and sulfate inter-layered Fe hydroxide [Fe(SO4)OH]. The zeta-potential results indicated a pHZPC value of 7.7. The adsorption equilibrium could be reached within 18h, and the kinetics data were well described by the Elovich and Power models due to the heterogeneous surfaces of FBBS. The isotherm experimental results suggested that the maximum adsorption amount of As(III) was around 59.7mg/g (initial As(III)=1-120mg/L, pH=7.0, T=25°C), which is higher than most of other low-cost adsorbents. The uptake of As(III) onto FBBS would increase with an increase in temperatures, inferring that it is an endothermic process. The optimal initial solution pH for As(III) removal was around pH 8.0. The release of sulfate from FBBS after As(III) adsorption implied the occurrence of ligand exchanges, while the mechanism of Fe(III) precipitation might be also involved. The spectra of FTIR and XPS revealed that the surface hydroxyl groups played an important role in the adsorption of As(III), and the oxidation state of As(III) was not changed. Moreover, phosphates (>1mM) could strongly inhibit the removal of As(III). The desorption results indicated that the release of As caused by alkali or phosphate eluent should be avoided for the scrutiny of waste landfill. © 2013 Elsevier B.V.
Zhu K.,SIPPR Engineering Group CO. |
Zhang J.,SIPPR Engineering Group CO. |
Jia S.,SIPPR Engineering Group CO.
Applied Mechanics and Materials | Year: 2012
Based on measured ventilation condition in thebuiltaerobic composting plant of large sludge treatment engineering,usingthe methord of CFD, four kinds of scheme for the new aerobic composting plantwere analysed,which contain two types of ventilation(natural air supply mechanical exhaust and mechanical air mechanical ventilation)and two kinds of supply air rates (4×10 5m3/h and 8×105m3/h). Studies have shown that the methord of mechanical air supply and exhaust is better than the original natural air mechanical exhaust in this plant; Themethord of mechanical air supply andexhaust is recommended to reduce ammonia content for personal breathing zone and ventilation energy consumption. © (2012) Trans Tech Publications, Switzerland.