高速电梯轿厢动力学参数对平稳性的影响分析及设计优化
发布时间：2019-03-25 07:18
【摘要】：随着电梯朝着高扬程、高速度的方向不断发展,由于高速运动引起的瞬态气动力变化、驱动系统振动、轿厢振动等一系列问题给电梯平稳性带来了极大的影响。本文针对对重-外缘系统气压瞬变、驱动系统柔性参数增益和轿厢系统弹性元件刚度调节对高速电梯所造成的平稳性影响分别进行了分析,将基于耦合推广正交算法用于高速电梯平稳性参数优选,优化求解了高速电梯平稳性参数。全文的主要内容如下：第一章首先综述了高速电梯的发展趋势,阐述了高速电梯气动、振动所引起的平稳性研究现状和相关领域的参数优化方法,然后给出了本文的研究背景、意义和主要内容。第二章研究了高速电梯在井道内的复杂气动力变化,提出了基于对重-外缘系统气压瞬变的高速电梯平稳性影响分析方法。建立了电梯轿厢-对重与井道的空气动力学模型,分析不同横向间距下电梯轿厢与对重间距所引起的瞬态气动力(侧向升力及气动阻力)变化,设计了流线型导流罩,得出其相关参数变化对瞬态气动力带来的影响,为高速电梯平稳性参数优化提供了依据。第三章研究了高速电梯驱动系统振动对高速电梯平稳性的影响,提出了基于驱动系统柔性参数增益的高速电梯平稳性影响分析方法。通过对驱动系统的振动特性进行理论分析,考虑了驱动系统振动相关因素分析对电梯平稳性产生的影响,然后对基于不同绳头等效刚度及曳引橡胶垫等效刚度进行振动模拟仿真,分析相应的频响及加速度位移,得出它们的变化对电梯平稳性的影响。第四章研究了高速电梯轿厢振动对高速电梯平稳性的影响,提出了基于轿厢系统弹性元件刚度调节的高速电梯平稳性影响分析方法。建立了高速电梯的垂直振动及水平振动力学模型,通过模态分析得出对应振型,结合相关的垂直振动影响因素和水平振动影响因素,对不同轿底弹簧等效刚度系数和轮架导轮刚度系数进行振动仿真分析,得到轿厢系统弹性元件刚度系数的变化对电梯平稳性所造成的影响。第五章提出了基于耦合推广正交算法的电梯平稳性参数优化方法。利用正交试验在解决单目标优化问题中的优势,在高速电梯轿厢动力学参数耦合强度关系的推广正交算法基础上,用小生境演化繁殖后代实现多平稳性性能指标优化,以KLK2系列高速电梯为例,对高速电梯平稳性优化数学模型进行优化求解。第六章,在总结了本文的研究内容和成果的基础上,对今后的研究方向进行了展望。
[Abstract]:With the development of elevator in the direction of high lift and high speed, a series of problems, such as transient aerodynamic change caused by high speed movement, vibration of driving system, vibration of car and so on, have brought great influence on the stability of elevator. In this paper, the influence of pressure transient, flexible parameter gain of driving system and stiffness adjustment of elastic element of car system on the stability of high-speed elevator are analyzed, respectively. The coupled extended orthogonal algorithm is used to optimize the stability parameters of high-speed elevators, and the stability parameters of high-speed elevators are optimized. The main contents of this paper are as follows: in the first chapter, the development trend of high-speed elevator is summarized, and the research status and parameter optimization methods of aerodynamic and vibration-induced stationarity of high-speed elevator are described. Then, the research background of this paper is given. Meaning and main content. In the second chapter, the complex aerodynamic variation of the high-speed elevator in the wellbore is studied, and an analysis method of the stability of the high-speed elevator based on the transient air pressure on the gravity-outer edge system is proposed. The aerodynamic model of elevator car-counterweight and wellbore is established. The transient aerodynamic force (lateral lift and aerodynamic resistance) caused by different transverse spacing between elevator car and counterweight distance is analyzed, and the streamlined diversion hood is designed. The influence of the relevant parameters on the transient aerodynamic force is obtained, which provides the basis for the optimization of the stationary parameters of the high-speed elevator. In the third chapter, the influence of the vibration of high-speed elevator drive system on the stability of high-speed elevator is studied, and the method of analyzing the stability of high-speed elevator based on the flexible parameter gain of the drive system is proposed. Through the theoretical analysis of the vibration characteristics of the drive system, the influence of the vibration related factors of the drive system on the stability of the elevator is considered. Then the vibration simulation is carried out based on the equivalent stiffness of different rope heads and the equivalent stiffness of the traction rubber pad. The corresponding frequency response and acceleration displacement are analyzed and the influence of their changes on the stability of the elevator is obtained. In chapter 4, the influence of vibration of high-speed elevator car on the stability of high-speed elevator is studied, and the analysis method of the stability of high-speed elevator based on the stiffness adjustment of elastic element of car system is proposed. The dynamic models of vertical vibration and horizontal vibration of high-speed elevator are established. Through modal analysis, the corresponding vibration modes are obtained, combined with the related influencing factors of vertical vibration and horizontal vibration. The vibration simulation analysis of the equivalent stiffness coefficient of different car bottom spring and the stiffness coefficient of wheel frame guide wheel is carried out, and the influence of the change of stiffness coefficient of elastic element of car system on the stability of elevator is obtained. In chapter 5, the optimization method of elevator stationarity parameters based on coupled extended orthogonal algorithm is proposed. Using the advantage of orthogonal experiment in solving single objective optimization problem, based on the extended orthogonal algorithm of coupling strength relation of dynamic parameters in high-speed elevator car, the multi-stationarity performance index optimization is realized by breeding progeny with niche evolution. Taking KLK2 series high-speed elevator as an example, the optimization mathematical model of high-speed elevator stationarity is optimized. In the sixth chapter, on the basis of summarizing the research contents and achievements of this paper, the future research direction is prospected.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU857
本文编号：2446760
[Abstract]:With the development of elevator in the direction of high lift and high speed, a series of problems, such as transient aerodynamic change caused by high speed movement, vibration of driving system, vibration of car and so on, have brought great influence on the stability of elevator. In this paper, the influence of pressure transient, flexible parameter gain of driving system and stiffness adjustment of elastic element of car system on the stability of high-speed elevator are analyzed, respectively. The coupled extended orthogonal algorithm is used to optimize the stability parameters of high-speed elevators, and the stability parameters of high-speed elevators are optimized. The main contents of this paper are as follows: in the first chapter, the development trend of high-speed elevator is summarized, and the research status and parameter optimization methods of aerodynamic and vibration-induced stationarity of high-speed elevator are described. Then, the research background of this paper is given. Meaning and main content. In the second chapter, the complex aerodynamic variation of the high-speed elevator in the wellbore is studied, and an analysis method of the stability of the high-speed elevator based on the transient air pressure on the gravity-outer edge system is proposed. The aerodynamic model of elevator car-counterweight and wellbore is established. The transient aerodynamic force (lateral lift and aerodynamic resistance) caused by different transverse spacing between elevator car and counterweight distance is analyzed, and the streamlined diversion hood is designed. The influence of the relevant parameters on the transient aerodynamic force is obtained, which provides the basis for the optimization of the stationary parameters of the high-speed elevator. In the third chapter, the influence of the vibration of high-speed elevator drive system on the stability of high-speed elevator is studied, and the method of analyzing the stability of high-speed elevator based on the flexible parameter gain of the drive system is proposed. Through the theoretical analysis of the vibration characteristics of the drive system, the influence of the vibration related factors of the drive system on the stability of the elevator is considered. Then the vibration simulation is carried out based on the equivalent stiffness of different rope heads and the equivalent stiffness of the traction rubber pad. The corresponding frequency response and acceleration displacement are analyzed and the influence of their changes on the stability of the elevator is obtained. In chapter 4, the influence of vibration of high-speed elevator car on the stability of high-speed elevator is studied, and the analysis method of the stability of high-speed elevator based on the stiffness adjustment of elastic element of car system is proposed. The dynamic models of vertical vibration and horizontal vibration of high-speed elevator are established. Through modal analysis, the corresponding vibration modes are obtained, combined with the related influencing factors of vertical vibration and horizontal vibration. The vibration simulation analysis of the equivalent stiffness coefficient of different car bottom spring and the stiffness coefficient of wheel frame guide wheel is carried out, and the influence of the change of stiffness coefficient of elastic element of car system on the stability of elevator is obtained. In chapter 5, the optimization method of elevator stationarity parameters based on coupled extended orthogonal algorithm is proposed. Using the advantage of orthogonal experiment in solving single objective optimization problem, based on the extended orthogonal algorithm of coupling strength relation of dynamic parameters in high-speed elevator car, the multi-stationarity performance index optimization is realized by breeding progeny with niche evolution. Taking KLK2 series high-speed elevator as an example, the optimization mathematical model of high-speed elevator stationarity is optimized. In the sixth chapter, on the basis of summarizing the research contents and achievements of this paper, the future research direction is prospected.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU857
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