风能发电机整机及关键部件动力学分析与研究
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摘要
风能发电机是利用风能驱动发电机,将机械能转化为电能的大型机组。经过20年的发展,我国已在该领域处于领水平。
本文利用UG,ANSYS等软件对风能发电机整机、关键部件进行了动力学分析与研究,将动力学分析方法与有限元分析软件结合起来,验证了实验数据的合理性。具体内容有：
1、风能发电机整机动力学分析。采用动力学软件FASTC(美国可再生能源实验室(NREL)开发)中提供的自由度模型,建立FAST线性化动力学方程,采用假设模态法建立风能发电机的结构动力学模型。
2、风能发电机整机动态特性分析。风能发电机的大型化使叶片和塔架的柔性不断增强,结构之间的耦合作用不可避免,加上风速的随机性等环境因素的作用,风能发电机多体系统结构的动态响应变得更加复杂。本部分主要针对风能发电机的多体系统动力学特性进行研究。
3、风能发电机叶片动力学分析。把风能发电机叶片看成是细长悬臂梁,因此可以用ANSYS程序中的柔性动力分析模块。该模块是用来计算在交变载荷作用下柔性体结构的响应,即由于耦合载荷作用使得风能发电机叶片的加速度、变形量在任意时刻都是变化的。还可分析出随时间变化的叶根的力和扭矩,这些力和扭矩为轮毂的进一步分析提供了理论数据。
4、风能发电机塔架动力学分析。风载荷对风能发电机塔架结构的作用由于其在空间和时间上的多变性变得更加复杂。本部分的整体模型是基于塔架顶端自由底端考虑基础刚度弹性约束模型与顶端自由底端固定所建立的,计算固有频率和振型,考察塔架动态特性受塔底基础刚度和塔顶机头质量的影响,分析风载荷对塔架的动态响应,为今后进一步研究风能发电机塔架结构提供依据。
5、风能发电机传动系统动力学分析。传动系统是风能发电机的重要组成部分,其性能的优劣在一定程度上决定着风能发电机能否正常运行。本部分将UG、ADAMS、ANSYS、ROMAX等软件有机的结合起来,充分发挥各软件的优势,研究及设计分析风能发电机传动系统的动力学情况。
本文对风能发电机的整机及关键部件进行了动力学分析与研究。对风能发电机整机进行了建模和动力学分析,然后对风能发电机关键部件即叶片、塔架和传动系统进行了动力学分析,得到了相关的结论。为今后风能发电机系统的科学设计,整机、关键部件的故障预测评估提供了理论支持。
The wind turbine is the use of wind-driven generators, large units of mechanical energy into electrical energy. After20years of development, China has been leading in the field level.
UG, ANSYS, and other software dynamic analysis and research on wind power generator machine, key components, dynamic analysis methods and finite element analysis software to verify the experimental data are reasonable. Specific work content:
1、The whole dynamic analysis of wind turbines. Dynamics software FAST (United States Renewable Energy Laboratory (NREL) development) degrees of freedom in the model, the establishment of FAST linearized kinetic equation, using the assumed mode method to establish the structural dynamics model of the wind power generator.
2、The whole dynamic characteristics of the wind generator. Large-scale wind generator blades and the tower of flexible and constantly enhance the coupling between the structure is inevitable, and the role of the randomness of the wind speed and other environmental factors, wind energy generator structure of the dynamic response of the body systems become more complex. This section focuses on the multi-body system dynamics of the wind energy generators.
3、Wind turbine blade dynamics. Wind energy turbine blade as a the slender cantilever, so you can use flexible dynamic analysis module in the ANSYS program. This module is used to calculate the alternating flexible response of the structure under load, so that the acceleration of the wind turbine blade loads due to the coupling, the deformation change at any time. Can also analyze the change with time of the force and torque of the blade root,these forces and torques as the theoretical data for further analysis of the hub.
4、Wind turbine tower dynamics. Wind loads on the role of the wind turbine tower structure becomes more complex because of its variability in space and time. This part of the overall model is based on the top of the tower bottom of the freedom to consider the foundation stiffness elastic constraint model is fixed to the bottom of the top free, calculate the natural frequency and modal investigated the tower dynamic characteristics by the bottom of the tower foundation stiffness and tower head quality impact analysis of the dynamic response of the wind load on the tower, to provide a basis for further study of wind turbine tower structure.
5、Wind turbine drive system dynamics.The drive system is an important part of the wind power generator, the performance of the pros and cons of wind turbines to some extent determines whether the normal operation. This section the UG, ADAMS, ANSYS,ROMAX software organic, give full play to the advantages of the software, research and design analysis of wind turbine drive system dynamics.
In this paper, the machine and key components of the wind energy generators kinetic analysis in research. Modeling and dynamic analysis of wind energy generating machine, and then the key components of wind turbines, blades, towers and transmission dynamics analysis to obtain the relevant conclusions. Provides a theoretical support for the assessment of the scientific design of the wind power generator system in the future, the whole key components of the failure prediction.
本文利用UG,ANSYS等软件对风能发电机整机、关键部件进行了动力学分析与研究,将动力学分析方法与有限元分析软件结合起来,验证了实验数据的合理性。具体内容有：
1、风能发电机整机动力学分析。采用动力学软件FASTC(美国可再生能源实验室(NREL)开发)中提供的自由度模型,建立FAST线性化动力学方程,采用假设模态法建立风能发电机的结构动力学模型。
2、风能发电机整机动态特性分析。风能发电机的大型化使叶片和塔架的柔性不断增强,结构之间的耦合作用不可避免,加上风速的随机性等环境因素的作用,风能发电机多体系统结构的动态响应变得更加复杂。本部分主要针对风能发电机的多体系统动力学特性进行研究。
3、风能发电机叶片动力学分析。把风能发电机叶片看成是细长悬臂梁,因此可以用ANSYS程序中的柔性动力分析模块。该模块是用来计算在交变载荷作用下柔性体结构的响应,即由于耦合载荷作用使得风能发电机叶片的加速度、变形量在任意时刻都是变化的。还可分析出随时间变化的叶根的力和扭矩,这些力和扭矩为轮毂的进一步分析提供了理论数据。
4、风能发电机塔架动力学分析。风载荷对风能发电机塔架结构的作用由于其在空间和时间上的多变性变得更加复杂。本部分的整体模型是基于塔架顶端自由底端考虑基础刚度弹性约束模型与顶端自由底端固定所建立的,计算固有频率和振型,考察塔架动态特性受塔底基础刚度和塔顶机头质量的影响,分析风载荷对塔架的动态响应,为今后进一步研究风能发电机塔架结构提供依据。
5、风能发电机传动系统动力学分析。传动系统是风能发电机的重要组成部分,其性能的优劣在一定程度上决定着风能发电机能否正常运行。本部分将UG、ADAMS、ANSYS、ROMAX等软件有机的结合起来,充分发挥各软件的优势,研究及设计分析风能发电机传动系统的动力学情况。
本文对风能发电机的整机及关键部件进行了动力学分析与研究。对风能发电机整机进行了建模和动力学分析,然后对风能发电机关键部件即叶片、塔架和传动系统进行了动力学分析,得到了相关的结论。为今后风能发电机系统的科学设计,整机、关键部件的故障预测评估提供了理论支持。
The wind turbine is the use of wind-driven generators, large units of mechanical energy into electrical energy. After20years of development, China has been leading in the field level.
UG, ANSYS, and other software dynamic analysis and research on wind power generator machine, key components, dynamic analysis methods and finite element analysis software to verify the experimental data are reasonable. Specific work content:
1、The whole dynamic analysis of wind turbines. Dynamics software FAST (United States Renewable Energy Laboratory (NREL) development) degrees of freedom in the model, the establishment of FAST linearized kinetic equation, using the assumed mode method to establish the structural dynamics model of the wind power generator.
2、The whole dynamic characteristics of the wind generator. Large-scale wind generator blades and the tower of flexible and constantly enhance the coupling between the structure is inevitable, and the role of the randomness of the wind speed and other environmental factors, wind energy generator structure of the dynamic response of the body systems become more complex. This section focuses on the multi-body system dynamics of the wind energy generators.
3、Wind turbine blade dynamics. Wind energy turbine blade as a the slender cantilever, so you can use flexible dynamic analysis module in the ANSYS program. This module is used to calculate the alternating flexible response of the structure under load, so that the acceleration of the wind turbine blade loads due to the coupling, the deformation change at any time. Can also analyze the change with time of the force and torque of the blade root,these forces and torques as the theoretical data for further analysis of the hub.
4、Wind turbine tower dynamics. Wind loads on the role of the wind turbine tower structure becomes more complex because of its variability in space and time. This part of the overall model is based on the top of the tower bottom of the freedom to consider the foundation stiffness elastic constraint model is fixed to the bottom of the top free, calculate the natural frequency and modal investigated the tower dynamic characteristics by the bottom of the tower foundation stiffness and tower head quality impact analysis of the dynamic response of the wind load on the tower, to provide a basis for further study of wind turbine tower structure.
5、Wind turbine drive system dynamics.The drive system is an important part of the wind power generator, the performance of the pros and cons of wind turbines to some extent determines whether the normal operation. This section the UG, ADAMS, ANSYS,ROMAX software organic, give full play to the advantages of the software, research and design analysis of wind turbine drive system dynamics.
In this paper, the machine and key components of the wind energy generators kinetic analysis in research. Modeling and dynamic analysis of wind energy generating machine, and then the key components of wind turbines, blades, towers and transmission dynamics analysis to obtain the relevant conclusions. Provides a theoretical support for the assessment of the scientific design of the wind power generator system in the future, the whole key components of the failure prediction.
引文
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