欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
为提高叶片在额定风况和低速风况下的功率系数，研究叶片各叶素处的气动外形参数分布。针对风力机通常运行在低风速风况下，而叶片的优化模型很少考虑该因素的影响，建立基于叶素动量理论和Wilson理论的带低风速功率系数的非线性约束优化模型。由于在处理约束条件的惩罚函数法中罚因子难以确定，而导致算法过早陷入局部解的早熟现象，提出一种结合可行性约束主导处理方法的混合粒子群算法。该算法基于粒子群优化和模拟退火理论，采用可行性约束主导在退火概率突跳下对不可行约束解进行随机生存选择，使种群保持多样性，从而朝更优方向进化，解决了非线性约束条件难以处理和种群易陷入局部解的问题。以1．5MW风力机叶片为研究对象，建立非线性约束优化模型，对该算法进行了验证。研究成果表明该方法可以有效地处理优化模型的非线性约束，避免优化过程陷入早熟，提高了叶片在额定风速和低风速区域的功率系数。为非线性约束处理方法的研究提供了一种很好的理论分析途径。．
英文摘要：
To increase the power coefficient of blade at both rated and low wind conditions, the distribution of aerodynamic shape parameter at each blade element is studied. The wind turbine is typically operated under low wind conditions, however the influence has rarely been considered in blade optimization model. Hence, a nonlinear constrained optimization model with power coefficient under low wind conditions is introduced based on the blade element momentum theory and Wilson theory. Since the penalty factor is difficult to be determined in penalty function method when dealing with constraints, which may lead to prematurity phenomenon that the algorithm falls into local solution, a hybrid particle swarm algorithm combined with feasible dominated-constraint method is brought up. Based on particle swarm optimization theory and simulated annealing theory, the algorithm applies feasible dominated-constraint method to perform random survival selection under drifting annealing probability, which keeps the population diverse and can be evolving in more optimized direction, thus solves the problem that nonlinear constraint is difficult to handle and the population＇s tendency to fall into local solution. So as to verify the algorithm, a nonlinear constrained optimization model for the 1.SMW wind turbine blade is established. The results indicate that the method can effectively handle nonlinear constraints, avoid prematurity of the process and increase the power coefficient of blade under rated and low wind conditions. It provides an excellent way of theoretical analysis to handle nonlinear constraints.
同期刊论文项目
同项目期刊论文
Fault diagnosis for speed-up and speed-down process of rotor-bearing system based on volterra series
The weak fault diagnosis and condition monitoring of rolling element bearing using minimum entropy d
A comparative study of information-based source number estimation methods and experimental validatio
Multi-fault classification based on wavelet SVM with PSO algorithm to analyze vibration signals from
Micromechanical modeling on the rate-dependent viscoplastic behavior of polymer composites with ther
Source Contribution Evaluation of Mechanical Vibration Signals via Enhanced Independent Component An
Micromechanical analysis of off-axis loading of fiber reinforced composites with imperfect interface
Free vibration and buckling analysis of plates using B-spline wavelet on the interval Mindlin elemen
A gamma Bayesian exponential model for computing and updating residual life distribution of bearings
The construction of multivariable Reissner-Mindlin plate elements based on B-spline wavelet on the i
Application of local mean decomposition to the surveillance and diagnostics of low-speed helical gea
Operation Reliability Assessment for Cutting Tools by Applying a Proportional Covariate Model to Con
Weak fault feature extraction of rolling bearing based on cyclic Wiener filter and envelope spectrum
Diversity enhanced and local search accelerated gravitational search algorithm for data fitting with
A new method of blind extraction of the cyclostationary signals and its applications to rotary machi
Construction of customized redundant multiwavelet via increasing multiplicity for fault detection of
An improved time-varying mesh stiffness algorithm and dynamic modeling of gear-rotor system with too
A joint stiffness identification method based on finite element modeling and frequency response func
Sparsity-enabled signal decomposition using tunable Q-factor wavelet transform for fault feature ext
Remaining life prognostics of rolling bearing based on relative features and multivariable support v
A new noise-controlled second-order enhanced stochastic resonance method with its application in win
Application of convolved blind separation based on second-order cyclic statistics in rolling element
Improved spectral kurtosis with adaptive redundant multiwavelet packet and its applications for rota
Compound faults detection of rotating machinery using improved adaptive redundant lifting multiwavel
Adaptive redundant multiwavelet denoising with improved neighboring coefficients for gearbox fault d
Fault feature extraction of gearbox by using overcomplete rational dilation discrete wavelet transfo
Noise resistant time frequency analysis and application in fault diagnosis of rolling element bearin
Wigner-Ville distribution based on cyclic spectral density and the application in rolling element be
Investigations of denoising source separation technique and its application to source separation and
Tunable Q-factor wavelet transform denoising with neighboring coefficients and its application to ro
Vibration Analysis of Curved Shell using B-spline Wavelet on the Interval (BSWI) Finite Elements Met
Multiwavelet denoising using SureBlock thresholding and its application in the gearbox fault diagnos
A demodulating approach based on local mean decomposition and its applications in mechanical fault d
A multichannel fusion approach based on coupled hidden Markov models for rolling element bearing fau
Maximal-overlap adaptive multiwavelet for detecting transient vibration responses from dynastic sign
Method for Vibration Response Simulation and Sensor Placement Optimization of a Machine Tool Spindle
Fault feature enhancement of gearbox in combined machining center by using adaptive cascade stochast
The multivariable finite elements based on B-spline wavelet on the interval for 1D structural mechan
Steam turbine rotor crack detection using sifting process of EMD and B-spline wavelet on the interva
A Monotonic Degradation Assessment Index of Rolling Bearings Using Fuzzy Support Vector Data Descrip
Independent component analysis based source number estimation and its comparison for mechanical syst
The influence of crack breathing and imbalance orientation angle on the characteristics of the criti
Study of characteristic variations of high-speed spindles induced by centrifugal expansion deformati
Zero crossing and coupled hidden Markov model for a rolling bearing performance degradation assessme
Singular spectrum analysis and continuous hidden Markov model for rolling element bearing fault diag
Automatic fault feature extraction of mechanical anomaly on induction motor bearing using ensemble s
Operation Reliability Estimation Based on Degradation Feature Extraction from Censored Data of Cutti
Intelligent fault diagnosis of rolling bearing based on kernel neighborhood rough sets and statistic
A comprehensive study of vibration signals for a thin shell structure using enhanced independent com
Dynamic modeling and vibration response simulation for high speed rolling ball bearings with localiz
Performance degradation assessment of rolling bearing based on bispectrum and support vector data de
期刊信息
位置：