Analysis and modelling of rotational systems with the Modyfit application

AbstrAct Purpose: of this article is to present an application to analysis and modelling of rotational systems. Independent modules of application enables controlling and regulation of characteristics of systems in transportation. The base problem of analyzing systems in transportation is expressing the interaction between the main motion and local vibrations of subsystems. Design/methodology/approach: Mathematical models derived in previous articles were used to implement the mathematical models in numerical calculations. The objectives of creating the Modyfit application were connected with analyzing and modelling rotating systems with taking into account relations between major and local motions. Considerations were done by the Galerkin’s method. Findings: There are many effects of analyzing systems with rotation consideration. Main of them are connected with analyzing systems in function of increasing the value of angular velocity. In such way of analyzing we can observe creating additional poles in the dynamical characteristics and we can also observe that instead of modes there are created zeros.

[1]  T. Dzitkowski,et al.  Modelling and synthesis of discrete–continuous subsystems of machines with damping , 2005 .

[2]  Gwidon Szefer Dynamics of elastic bodies in terms of plane frictional motion , 2001 .

[3]  G. Wszołek Modelling of mechanical systems vibrations by utilisation of GRAFSIM software , 2005 .

[4]  A. Dymarek The sensitivity as a criterion of synthesis of discrete vibrating fixed mechanical system , 2004 .

[5]  Jerzy Świder,et al.  Analysis of complex mechanical systems based on the block diagrams and the matrix hybrid graphs method , 2004 .

[6]  Jürgen Moser,et al.  Dynamical Systems, Theory and Applications , 1975 .

[7]  A. Buchacz,et al.  Mechanical systems vibrating longitudinally with the transportation effect , 2007 .

[8]  G. Wszołek Vibration analysis of the excavator model in GRAFSIM program on the basis of a block diagram method , 2004 .

[9]  G. Wszołek,et al.  Physical and geometrical data acquiring system for vibration analysis software , 2005 .

[10]  Andrzej Buchacz,et al.  Dynamic analysis of the mechanical systems vibrating transversally in transportation , 2007 .

[11]  S. Żółkiewski Modelling of dynamical systems in transportation using the modyfit application , 2008 .

[12]  T. Dzitkowski Computer-aided synthesis of discrete-continuous subsystems of machines with the assumed frequency spectrum represented by graphs , 2004 .

[13]  G. Szefer Dynamics of elastic bodies undergoing large motions and unilateral contact , 2000 .

[14]  Jerzy Świder,et al.  Hybrid graphs in modelling and analysis of discrete–continuous mechanical systems , 2005 .