摘要
以齿式联轴器的不对中故障为研究对象,推导不对中激励力表达式,并从动力学的角度,建立不对中弯扭耦合振动微分方程。基于该微分方程,文中先从理论分析角度,定性分析弯振对扭振的影响和扭振对弯振的影响,接着从变转速过程、质量偏心、不对中量以及阻尼系数对弯扭耦合特性影响几方面进行数值仿真分析。计算表明,弯振与扭振是相互耦合的,质量偏心是耦合的前提。弯振频率包含工频和二倍频成分等,不对中越严重,二倍频所占比例越大,其轴心轨迹为双环椭圆。弯扭耦合将激发各阶谐波扭振,包括工频、二倍频和三倍频,其中工频扭振占主导地位。
Misalignment fault of gear coupling is the main study object. An expression of misalignment exciting force that acts on the single disc rotor system is derived. From the angle of energy, the differential equations of coupled lateral and torsional vibrations are built. The influences of lateral vibration on torsional vibration and the influences of torsional vibration on lateral vibration are analyzed qualitatively. Then a numerical simulation about the properties of coupled lateral and torsional vibrations is carried out from several aspects, such as changed speeds, mass eccentricities, misalignment values and damping coefficients. It is shown that lateral vibration and torsional vibration are coupled, and the mass eccentricity is the precondition. The frequencies of lateral vibration contain 1X and 2X components. More serious the misalignment is, more bigger the scale of 2X component is. The orbit is like double ellipses. Several harmonic frequencies of torsional vibration are excited, which is mainly composed of IX, 2X and 3X components. And the frequency of IX is the main component.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2005年第6期725-729,共5页
Journal of Mechanical Strength
关键词
齿式联轴器
不对中
弯扭耦合振动
质量偏心
Gear coupling
Misalignment
Coupled lateral and torsional vibrations
Mass eccentricity
