Zhengyan Zhang

Dynamics researches of Megawatt Wind Turbine Gear Increaser based on Adams

Taking the Megawatt Wind Turbine Gear Increaser as research object, the dynamics model was constructed by the software of SOLIDWORKS and ADAMS. STEP function was applied to simulate the driving rotation and load. Carried out FFT transform to the key components, and obtain the curves in time domain and frequency domain about meshing force. Compared with the theoretical analysis results, the simulation results and theoretical analysis results are consistent.

The optimization design of triple gear-box assembeled with spiral-bevel and helical-spur gears

Aiming at the optimization of volume minimization, to create the optimized model of spiral bevel helical gear which includes 14 design variables, 14 transmission quality constraints, and discrete modulus values on the basis of genuine engineering examples; to construct mathematic functions with good performance as well as corresponding programs, integrate with MATLAB optimization toolbox, realize two kinds of optimization design at the premise of discrete value, and avoid the deficiency in the optimization traditional reducer design which handle modulus as continuous variables. The result drawn from the comparison with the given scheme indicates the volume reduction, material saving, which is of great practical significance.

The optimization of two-stage planetary gear train based on mathmatica

Planetary gear reducer has a lot of advantages, such as high transmission and efficiency, compact structure, and has a variety of applications in construction machinery and equipment, hoisting and conveying machinery and so on. The optimization design of the planetary gear train could make the volume at minimum(as well as the weight at minimum) under the conditions of carrying capacity. This paper focus on the optimization of two stage planetary gear train with the differential evolution algorithm, based on Mathmatica. The author established mathematical model and source program is present in this paper. After the optimization, the author verifies the optimal result, including the contact fatigue stress and tooth bending strength fatigue stress. The verification infers that the optimization based on Mathmatica with differential evolution algorithm is effective and correct.

Mechanical research of the planet carrier in wind turbine gear increaser based on co-simulation of ADAMS-ANSYS

As one of the most important parts in the wind turbine gear increaser, the planet carrier plays a role that is irreplaceable in the whole machine equipment. Co-simulation technology is one kind of new method which owes the characteristic of higher accuracy than the traditional safety coefficient method. Because the planet carrier has the features of irregularly shaped and working in alternating dynamic environment, co-simulation technology of ADAMS-ANSYS is applied to the mechanical research of the planet carrier in wind turbine gear increaser. The dynamic simulation of the whole gear increaser system is conducted based on the ADAMS platform in which the compact force、friction force and step driving are taken into consideration, with the maximum forces which are forced on the planet carrier calculated out. In the process of finite element analysis, there are three important steps which are modeling、meshing process、force application and result calculation. Strength check of the planet carrier with all kinds of dynamic elements into consideration is completed by taking the calculated maximum forces as the load inputs in the force application process. The planet carrier designed through the co-simulation method is lighter and more material-saving than it is through the safety factor method.

The expert system of double-stage involute cylindrical gear assistant design transmission system

The double-stage Involute Cylindrical Gear assistant design transmission system was developed according to Programmed Design process, uder the software environment of VB6.0. All the users need to do is to enter the relevant parameters, then the system could judge whether the Cylindrical Gear transmission system is satisfactory in Fatigue Strength and Bending Strength, thus the time of checking by handwork calculation can be saved.

Jack-up wind installation vessel finite element analysis

Application of empirical formulas and related documents,calculation of the wind farm installation vessels environment loads. Establish the model of wind farm installation vessel by the usage of software ANSYS to the actual situation. We can applied the Calculated environmental loads and dynamic load which obtained in the most adverse conditions to the model, Then we can make a strengthen analysis by the software ANSYS, Apply the ANSYS to the model for modal analysis, analysis of the natural frequency, Vibration of wind farm installation vessel.

Modeling of virtual prototype and the rescue scene of the high buildings escape vehicle based on virtual reality

This paper introduces a kind of rescue vehicle with laminated multilayer platforms used in the case of fire on large area and many floors, as well as the virtual prototype of that vehicle established with Solidworks. The special effects of the flame, smoke and characters is handled with particle system in 3DS MAX to accomplish in the scene, in order to accomplish virtual rescue scene with lifelike visual effect and the immersive simulation of rescue process on the escape vehicle working in virtual environment.

Optimal design of single-stage cylindrical spur gear reduction gearbox based on Matlab

Considering center distance and gear facewidth, establishing the optimized objective function and constraint equation of properties, while optimizing the data by utilizing the Matlab optimization tool box, it is discovered that, through analysis of the outcomes compared with the original design data, the optimized objective value has reduced by 24.77%, and the centre distance by 15%, in contrast to the initially set.

Dynamics model and dynamic simulation of overhead crane load swing systems based on the ADAMS

According to dynamics computation model of the overhead crane, analyse the load swing when the small trolley is moving, and obtain the swing kinematics equation of the load. Further, carry out the computer dynamic simulation with the 32t double beams overhead crane as an instance whose results verify the swing kinematics equation and represent the true moving process of the load when the small trolley is moving. That research method is portable so that it is suitable for researches on the load swing of other type cranes such as Shore container hoist crane, gantry crane and so on.