400四拐曲轴扭振分析研究
发布时间：2018-09-07 07:49
【摘要】：压缩机制造业日益发展的新技术在逐渐满足了低能耗、低排放、低噪声目标的同时，也对压缩机结构可靠性设计和振动控制提出了更高的要求。伴随这一发展趋势，内燃机的轴系扭振问题也日益凸现出来。其中曲轴是压缩机中最重要的部件，也是受力最复杂的部件，同时也影响压缩机的可靠性与寿命。随着压缩机技术的不断完善和发展，曲轴的工作条件也愈加苛刻，对曲轴的强度提出了更高的要求。在这一背景下，追求扭振理论的进一步完善，寻求新的扭振解决方案势在必行。本文总结了一些前人计算轴系扭振的方法，以有限元思想作指导，运用系统矩阵法对复杂轴系进行扭振计算、分析，获得机组轴系的扭振特性和稳态动力响应。本文主要工作是压缩机轴系三维建模、轴系固有频率分析、轴系在简谐力作用下的静动强度分析、轴系的稳态动态振动特性分析及结构优化等几方面来展开的，主要内容包括： （1）以远大压缩机有限公司4M80型压缩机作为研究对象。首先利用三维建模软件PROE对其进行零件的建模与装配。随后将三维模型导入软件ANSYSWORKBENCH中施加边界条件对其进行相应的静力结构分析、模态分析等。 （2）对压缩机曲轴系模型进行固有频率及主振型分析。将各曲拐上的激励载荷——气体力和惯性力产生的干扰力矩进行简谐分析，进行轴系的强迫振动计算，从而得到轴系的动态振动特性。 （3）根据所得到的轴系稳态动态振动特性，，并结合材料强度全面评定整个轴系工作的可靠性，采取避振减振措施来避免轴系的振动问题。 通过上述工作及其结果能够分析和预测实际压缩机轴系扭转振动的情况。并且运用ANSYS WORKBENCH软件能够方便地对各种工况进行模拟，非常适合工程上对于压缩机的研究和开发。
[Abstract]:The new technology of compressor manufacturing industry has gradually met the requirements of low energy consumption, low emission and low noise, but also put forward higher requirements for the structural reliability design and vibration control of compressors. Along with this development trend, the torsional vibration problem of internal combustion engine shafting has become increasingly prominent. The crankshaft is the most important part of compressor and the most complicated part, and it also affects the reliability and life of compressor. With the continuous improvement and development of compressor technology, the working conditions of crankshaft are becoming more and more harsh, which puts forward higher requirements for the strength of crankshaft. Under this background, it is imperative to pursue the further improvement of torsional vibration theory and seek a new solution to torsional vibration. In this paper, some previous methods for calculating torsional vibration of shafting are summarized. Under the guidance of finite element method, the torsional vibration of complex shafting is calculated by system matrix method, and the torsional vibration characteristics and steady-state dynamic response of shafting are obtained. The main work of this paper is three dimensional modeling of compressor shafting, analysis of natural frequency of shafting, static and dynamic strength analysis of shafting under simple harmonic force, analysis of steady state and dynamic vibration characteristics of shafting and structural optimization, etc. The main contents are as follows: (1) take the 4M80 compressor of Great Compressor Co., Ltd as the research object. Firstly, three-dimensional modeling software PROE is used to model and assemble the parts. Then the 3D model is introduced into the software ANSYSWORKBENCH to carry on the corresponding static structure analysis, modal analysis and so on. (2) the natural frequency and the main mode of the compressor crankshaft system model are analyzed. The excitation load-air force and the disturbance torque caused by inertia force are analyzed harmonically, and the forced vibration of shafting is calculated. Thus the dynamic vibration characteristics of the shafting are obtained. (3) according to the obtained steady state dynamic vibration characteristics of the shafting and the reliability of the whole shafting work is comprehensively evaluated combining with the strength of the material, the vibration damping measures are taken to avoid the vibration problem of the shafting. Through the above work and its results, the torsional vibration of the actual compressor shafting can be analyzed and predicted. And the ANSYS WORKBENCH software can be used to simulate various working conditions conveniently, which is very suitable for the research and development of compressors in engineering.
【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH45;TH113.1
本文编号：2227654
[Abstract]:The new technology of compressor manufacturing industry has gradually met the requirements of low energy consumption, low emission and low noise, but also put forward higher requirements for the structural reliability design and vibration control of compressors. Along with this development trend, the torsional vibration problem of internal combustion engine shafting has become increasingly prominent. The crankshaft is the most important part of compressor and the most complicated part, and it also affects the reliability and life of compressor. With the continuous improvement and development of compressor technology, the working conditions of crankshaft are becoming more and more harsh, which puts forward higher requirements for the strength of crankshaft. Under this background, it is imperative to pursue the further improvement of torsional vibration theory and seek a new solution to torsional vibration. In this paper, some previous methods for calculating torsional vibration of shafting are summarized. Under the guidance of finite element method, the torsional vibration of complex shafting is calculated by system matrix method, and the torsional vibration characteristics and steady-state dynamic response of shafting are obtained. The main work of this paper is three dimensional modeling of compressor shafting, analysis of natural frequency of shafting, static and dynamic strength analysis of shafting under simple harmonic force, analysis of steady state and dynamic vibration characteristics of shafting and structural optimization, etc. The main contents are as follows: (1) take the 4M80 compressor of Great Compressor Co., Ltd as the research object. Firstly, three-dimensional modeling software PROE is used to model and assemble the parts. Then the 3D model is introduced into the software ANSYSWORKBENCH to carry on the corresponding static structure analysis, modal analysis and so on. (2) the natural frequency and the main mode of the compressor crankshaft system model are analyzed. The excitation load-air force and the disturbance torque caused by inertia force are analyzed harmonically, and the forced vibration of shafting is calculated. Thus the dynamic vibration characteristics of the shafting are obtained. (3) according to the obtained steady state dynamic vibration characteristics of the shafting and the reliability of the whole shafting work is comprehensively evaluated combining with the strength of the material, the vibration damping measures are taken to avoid the vibration problem of the shafting. Through the above work and its results, the torsional vibration of the actual compressor shafting can be analyzed and predicted. And the ANSYS WORKBENCH software can be used to simulate various working conditions conveniently, which is very suitable for the research and development of compressors in engineering.
【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH45;TH113.1
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本文编号：2227654
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