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Guo H.C.,Hunan Institute of Science and Technology | Dai L.P.,Jinan Railway Vehicles Equipment Co. | Ding C.Y.,Hunan Institute of Science and Technology
Applied Mechanics and Materials | Year: 2013

The reactions, equations of moment and the overall moment of two planes were deduced based on mechanics of materials, as the main shaft was assumed to be a homogeneous three-section beam. Based on the fourth strength theory, equivalent stresses of three cross sections were solved. Based on the deduced conclusion, the equivalent stress of a various ultimate load cases were solved automatically by entering the loads of the hub center in the Excel, which was applied to the design and optimize for the main shaft. © (2013) Trans Tech Publications, Switzerland.


Ding C.,Hunan Institute of Science and Technology | Dai L.,Jinan Railway Vehicles Equipment Co. | Guo H.,Hunan Institute of Science and Technology
Applied Mechanics and Materials | Year: 2012

ANSYS12.1 software is applied to the generator frame modeling and the static and dynamics performance analysis of the frame. The frame is calculated to find the max stress and the first six frequency, and based on the results, some suggestions is put forward for the optimization design. © (2012) Trans Tech Publications, Switzerland.


Guo H.C.,Hunan Institute of Science and Technology | Dai L.P.,Jinan Railway Vehicles Equipment Co. | Ding C.Y.,Hunan Institute of Science and Technology
Applied Mechanics and Materials | Year: 2013

The reliability model and test method of wind turbine is described in the paper. According to the characteristics of wind turbine product, a truncate sequential compliance method for reliability test is designed, and it is given an example for 1MW wind turbine. The example shows accumulating more before-test experience and decreasing the experiment time appropriately won't result in the reduction of the reliability. © (2013) Trans Tech Publications, Switzerland.


Lu X.,Zhejiang University | Lu X.,Jinan Railway Vehicles Equipment Co. | Li W.,Zhejiang University | Lin Y.,Zhejiang University
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2012

The yaw and individual pitch control of floating offshore wind turbines was presented. The hydrodynamics and kinematics of the floating platform were presented, and the platform model was built. The control strategy of onshore wind turbine was taken as reference. The pitch angle, yaw and power were taken as control objects. Expert PID controllers were designed to overcome the nonlinearity, and d-q axis transformation was used to translate the control signals to the three blades. To verify the controller, the simulation based on FAST has been carried out. The results showed that the individual controller can effectively reduce the pitch angle of the platform with little influence to the power.


Xu B.,Jinan Railway Vehicles Equipment Co. | Lv C.,Jinan Railway Vehicles Equipment Co.
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2012

Bladed 3.81 software was applied to load calculation for a wind turbine. Combined with theoretical calculations, the effect of the wind shear on the tower load was analysed. Then ANSYS12.1 software was applied to the tower modeling and the static structural analysis to the door station of the tower with the load at each high, whose results were used to analyse the effect of the wind shear on the stress of the tower. The results showed that the ratio of the wind shear's effect in M xy and F xy of the tower bottom's load reached 20.60% and 32.17%, respectively; The maximum stress of the doorframe was calculated to be 217.82MPa with the load at the top and 275.94MPa with the load at 15.695m high, different between which was 58.12MPa. The effect of wind shear on the load and structural analysis of the tower could not be ignored.


Lu X.,Jinan Railway Vehicles Equipment Co. | Wu S.,Jinan Railway Vehicles Equipment Co.
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2014

The individual pitch technology of wind turbine was studied based on load estimation. The control technology of traditional individual pitch needs measuring bending moment of blade root as the target value and installing load sensor in each blade, which will increase installation and maintenance cost, and introduce measuring noise. The above problems can be solved by the individual pitch technology of wind turbine based on load estimation. The main load resources of wind turbine and their degree of influence were analyzed and the process model of wind loads was set up. MFA controllers were designed to control the load components on the two orthogonal axes. The nonlinear model FAST of NREL's wind turbine was used to verify the controller, and the test results show the individual controller could eliminate the imbalance loads effectively. Comparing with general pitch control, the for-aft torque was decreased by 23%, yaw torque was decreased by 15%, and the value of output power changes little. ©, 2014, Science Press. All right reserved.


Patent
Jinan Railway Vehicles Equipment Co. | Date: 2014-10-01

The present invention provides a bogie for high-speed railway vehicles, comprising a wheelset, a frame, a primary suspension system and a secondary suspension system; wherein the frame comprises side beams and an intermediate crossbeam, a middle part of each of the side beams is a concave portion, and both ends of the intermediate crossbeam are separately connected with the concave portions of the side beams; the primary suspension system comprises primary axle box suspension devices, one end of each of the primary axle box suspension devices is connected with a wheel axle of the wheelset, and the other end is supported at one end of one of the side beams; and the secondary suspension system comprises at least two spring sets, which are arranged at interval on the intermediate crossbeam and located between the side beams, and upper parts of the spring sets are connected with a carbody. In the bogie for high-speed railway vehicles of the present invention, the spring sets of the secondary suspension system can provide a proper moment of rotational resistance between the frame and carbody, thus increasing the linear running stability, curve negotiation performance and critical speed of the railway vehicles.


Patent
Jinan Railway Vehicles Equipment Co. | Date: 2014-12-15

The present invention discloses an elastic side bearing assembly system for railway vehicles, including a side bearing body, a side bearing seat, a first ball hinge assembly, a connecting rod and a second ball hinge assembly, side bearing body connected to side bearing seat via first ball hinge assembly, connecting rod and second ball hinge assembly, first ball hinge assembly provided below one end of side bearing body, second ball hinge assembly provided above side bearing seat at different end with respect to first ball hinge assembly, first ball hinge assembly connected to second ball hinge assembly via connecting rod; side bearing springs provided between side bearing body and side bearing seat, stoppers provided above side bearing seat, and side bearing springs connected to side bearing body and side bearing seat respectively by extending through stoppers; a side bearing wear plate provided above side bearing body.


Patent
Jinan Railway Vehicles Equipment Co. | Date: 2013-11-06

A railway vehicle bogie comprises a frame, a bolster, a wheel set assembly, an axle box suspension system, a longitudinal traction device and a hanger rod device. Wherein, the bolster is connected with the frame through the hanger rod device, and the frame is suspended above the wheel set assembly through an axle box; and one end of the longitudinal traction device is connected with the frame, and the other end of the longitudinal traction device is connected with the bolster and used for transferring a force along a longitudinal direction between the frame and the bolster. According to the railway vehicle bogie provided by an embodiment, the longitudinal traction device is arranged between the frame and the bolster and can transfer the longitudinal force between the frame and the bolster, so that the longitudinal traction device is more proper compared with the longitudinal stop for transferring the longitudinal force in the prior art; in addition, the hanger rod device with a novel structure in the railway vehicle bogie provided by an embodiment can effectively avoid the problem of abrasion in the hanger rod device in the prior art.


Patent
Jinan Railway Vehicles Equipment Co. | Date: 2015-05-06

The present invention discloses a simulation testing platform for a wind power plant and testing method thereof. The platform includes an upper computer, a wind power plant simulation machine and a wind power plant management system prototype communicating with each other. The upper computer is used for setting and monitoring the entire testing process, the wind power plant simulation machine is used for simulating the entire wind power plant, the wind power plant management system prototype is used for rapidly realizing the real wind power plant management system to be tested. The test method includes steps of establishing a wind power plant model, configuring the wind power plant simulation machine, configuring the wind power plant management system prototype, setting test working conditions and model parameters, monitoring test process, processing, analyzing and evaluating the test result. The present invention can test the software and hardware of wind power plant management system in laboratory during developing, reduce the period and cost of the system development, reproduce the working conditions of the scene including fault and extreme working conditions, and reduce the cost of upgrading and maintenance in a later stage.

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