scholarly journals Effect of Out-of-Roundness on the Performance of a Diesel Engine Connecting-Rod Bearing

1993 ◽  
Vol 115 (3) ◽  
pp. 538-543 ◽  
Author(s):  
D. Vijayaraghavan ◽  
D. E. Brewe ◽  
T. G. Keith
Keyword(s):  
Diesel Engine ◽  
Boundary Conditions ◽  
Nonlinear Equations ◽  
Dynamic Performance ◽  
Equations Of Motion ◽  
Load Cycle ◽  
Performance Parameters ◽  
Connecting Rod ◽  
Nonlinear Equations Of Motion

In this paper, the dynamic performance of the Ruston and Hornsby VEB diesel engine connecting-rod bearing with circular and out-of-round profiles is analyzed. The effect of cavitation is considered by using a cavitation algorithm, which mimics JFO boundary conditions. The effect of mass inertia is accounted for by solving coupled nonlinear equations of motion. The journal profiles considered are circular, elliptical, semi elliptical and three lobe epicycloid. The predicted journal trajectory and other performance parameters for one complete load cycle are presented for all of the out-of-round profiles and are also compared with the predictions for the circular bearing.

A New Displacement Form for the Nonlinear Equations of Motion of Shells of Revolution

1985 ◽  
Vol 52 (3) ◽  
pp. 507-509 ◽  
Author(s):  
J. G. Simmonds
Keyword(s):  
Boundary Conditions ◽  
Nonlinear Equations ◽  
Equations Of Motion ◽  
Shells Of Revolution ◽  
Governing Equations ◽  
Hoop Strain ◽  
Axisymmetric Motion ◽  
Nonlinear Equations Of Motion ◽  
Surface Loads ◽  
Theory Of Shells

In the theory of shells of revolution undergoing torsionless, axisymmetric motion, an extensional and a bending hoop strain are introduced that are linear in the displacements, regardless of the magnitudes of the strains and the meridional rotation. The resulting equations of motion and boundary conditions are derived and some common conservative surface loads are listed along with their potentials. The governing equations appear to be the simplest possible in terms of displacements.

Nonlinear Dynamic Performance Analysis of Elastic Linkage Mechanisms

1997 ◽  
Author(s):  
Zhang Xianmin ◽  
Guo Xuemei
Keyword(s):  
Nonlinear Equations ◽  
Geometric Nonlinearity ◽  
Solution Method ◽  
Dynamic Performance ◽  
Equations Of Motion ◽  
Time Varying ◽  
Linkage Mechanism ◽  
Coupling Terms ◽  
Nonlinear Equations Of Motion ◽  
Dynamic Performance Analysis

Abstract In this paper, the generalized nonlinear equations of motion for elastic linkage mechanism systems are presented, in which the gross motion and elastic deformation coupling terms and the geometric nonlinearity effects are taken into account. The equations of motion are period and time-varying nonlinear equations. According to the characteristics, solution method for this kind nonlinear equations is investigated, and an efficient closed-form iterative procedure is presented. The effects of geometric nonlinearity on linkage mechanisms are studied. The results of this study are important for dynamic design of linkage mechanism systems.

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