Analysis Of Self-excited Vibrations Research Articles

Analysis of Self-Excited Vibration Generated in Asymmetric Rotating Shaft with Anisotropic Support

Analysis of Self-Excited Vibration Generated in Asymmetric Rotating Shaft with Anisotropic Support

The Analysis of Self-Excited Vibration in Processing System of Single Blade Rigid Boring Reamer

The reaming process with rigid single blade reamers boring is one kind of deep processing methods which develop rapidly in recent years,which has a series of advantages such as high-speed cutting, auto-oriented, low surface roughness and so on.Appear as one kind of precision hole processing technology in the deep hole processing currently,and shows the superiority of processing.The self-excited vibration is a common phenomenon in deep processing,and seriously affect the stability of hole machining and processing quality.It performance very obvious in rigid single blade reamers boring processing,and has a certain degree of particularity. Established as a mathematical model of the rigid boring reamerThe analysis of mechanism of Self-excited vibration in reaming processing of single blade rigid boring reamer, and the study the impact of the friction characteristics of the guide block and the hole in self-excited vibrations,provide the basis for the inhibition of self-excited vibration.

906 自動車ワイパーのびびり振動解析

906 自動車ワイパーのびびり振動解析

Effects of stiffness and damping coefficients of the spindle bearing on the dynamics of the cylindrical plunge grinding process

This paper presents a multi-degree analysis of self-excited vibrations of a grinding system including the spindle and the workpiece rotational effects. A dynamic analysis was carried out for an external cylindrical plunge grinding process. Governing equations were derived by applying a finite element method to the rotor structure of the spindle and workpiece, and the grinding force was modelled using empirical equations. By computerizing this model, the displacement of the workpiece and grinding force were simulated with machining time. The simulation predicts the effects of the stiffness and damping coefficients of the spindle bearing on the displacement and grinding force. The effects on the chatter growth rate are also presented.

Analysis of self-excited vibrations of automotive wiper Shuji Matumura (Subara Research Center Co. Ltd.), Ken-ichi Nagai (Gunma University), Ryu Ikezawa (Mitsuba Co. Ltd.), Kangen Yamaura (Fuji Heavy Ind. Co. Ltd.)

Analysis of self-excited vibrations of automotive wiper Shuji Matumura (Subara Research Center Co. Ltd.), Ken-ichi Nagai (Gunma University), Ryu Ikezawa (Mitsuba Co. Ltd.), Kangen Yamaura (Fuji Heavy Ind. Co. Ltd.)

Theoretical analysis of self-excited vibrations in a machine-tool, isolated mounting-base system

This paper describes the theoretical analysis of the dynamic performance of a machine-tool isolated mounting-base system when unstable behaviour of the moving slider — stick slip motion — occurs owing to low driving speed. The equations of motion are derived from Lagrange's equation when the basic energy expressions of such a system are known.

An analysis of self-excited vibrations where the effects of machine characteristics are considered

This paper deals with the analysis of self-excited vibrations in a nonlinear system with 2 degrees-of-freedom where machine characteristics are taken into account. Most attention is given to determining the stability boundaries of the system, given by a limiting value of damping coefficient, which will ensure system stability for a given ratio of moments inertia. The theoretical results are applied to the practical problem of the dynamics of the axle-driving system for diesel-electric locomotives under conditions where the adhesion limit is exceeded.

Self-Excited Vibration in Cylindrical Grinding : Part 2, Theoretical Study

An analysis of self-excited vibration in cylindrical grinding is made. The equation of motion of the work is derived assuming that the dynamic grinding force is proportional to the time derivative of the removed work volume. The conclusions are as follows : (1) Self-excited vibration is caused by regenerative effect, and not by negative damping. (2) Self-excited vibration does not occur in low work speed range, and the work speed at which instability appears becomes higher with increasing depth of grinding or infeed. These conclusions generally agree with experimental results. The rango of phase lag in which regenerative self-excited vibration with finite amplitude can be maintained is calculated by a digital computer and found to become narrower with increasing amplitude.

The analysis of self-excited vibrations in metal cutting

The analysis of self-excited vibrations in metal cutting