scholarly journals Discussion: “Inertia Force Analysis of Spatial Mechanisms” (Yang, An Tzu, 1971, ASME J. Eng. Ind., 93, pp. 27–32)

1971 ◽  
Vol 93 (1) ◽  
pp. 32-33
Author(s):  
J. S. Beggs
Keyword(s):  
Inertia Force ◽  
Force Analysis ◽  
Spatial Mechanisms

Inertia Force Analysis of Spatial Mechanisms

1971 ◽  
Vol 93 (1) ◽  
pp. 27-32 ◽  
Author(s):  
An Tzu Yang
Keyword(s):  
Closed Form ◽  
Mechanical System ◽  
Dynamic Equation ◽  
Geometric Interpretation ◽  
Analytical Tool ◽  
Inertia Force ◽  
Force Analysis ◽  
Digital Computation ◽  
Spatial Mechanisms ◽  
Analytical Expressions

A dual dynamic equation, based on dual vectors and screw calculus, is formulated here to provide a concise analytical tool for the study of the dynamics of rigid members in any complex mechanical system. In this paper the equation is applied to inertia force analysis of an RCCC mechanism of general proportions; bearing reactions and inertia torque are obtained in closed form dual-number expressions. Such analytical expressions are more susceptible for geometric interpretation and well adapted for digital computation.

Binding Force Analysis of Multiple Pairs of Bars Space RCCR Mechanism without Inertia Force

2013 ◽  
Vol 397-400 ◽  
pp. 457-460
Author(s):  
Sen Zhuang ◽  
Chao Cui ◽  
Bo Han ◽  
Kai Ouyang
Keyword(s):  
Theoretical Analysis ◽  
Rigid Body ◽  
Multibody Dynamics ◽  
Body Condition ◽  
Tangential Force ◽  
Inertial Force ◽  
Inertia Force ◽  
Force Analysis ◽  
Simulation Data ◽  
Binding Force

In close to the rigid body condition,to solve the binding force of multiple pairs of bars space RCCR mechanism,first, starting from solving main binding force of three-pair bars space RCCR mechanism by the theoretical analysis, to have obtained the change law of the main binding force without the inertial force (extremely low speed) by using the computational multibody dynamics software ’COSMOSMotion’ and then summed up the equivalent tangential force through the investigation of the simulation data. Finally the concept of equivalent tangential binding force was expanded to 4, 5, 6 pairs of bars space RCCR mechanism.

Dynamic Analysis of Motorcycle Engine Rod Bending and Fracture Failure

2011 ◽  
Vol 418-420 ◽  
pp. 1817-1824
Author(s):  
Chang De He
Keyword(s):  
Safety Factor ◽  
Scientific Basis ◽  
Inertia Force ◽  
Force Analysis ◽  
Connecting Rod ◽  
Fracture Failure ◽  
Single Cylinder Engine ◽  
Reciprocating Movement ◽  
Motorcycle Engine

Taking Motorcycle Engine as the research object, force analysis of the single cylinder engine connecting rod bending and fracture by engine linkage dynamic model. By calculating the connecting rod compression, combustion chamber total pressure, reciprocating movement of the inertia force and from the rod bend parameters to compare the models currently on the market four types in the working state suffered total stress and strength margin safety factor, found that the safety factor of four models in general partial link is small, especially 152QMI engine connecting rod end connecting rod in the hole near easier to bend and break. This study provide a scientific basis for the engine connecting rod design, the quality of correction and failure analysis.

Dynamics of an Overconstrained Shaft Coupling

1986 ◽  
Vol 108 (4) ◽  
pp. 497-505 ◽  
Author(s):  
Tyng Liu ◽  
Ting W. Lee
Keyword(s):  
Experimental Method ◽  
Matrix Method ◽  
Dynamic State ◽  
Primary Concern ◽  
Force Analysis ◽  
General Applicability ◽  
Analytical Technique ◽  
Axial Forces ◽  
Spatial Mechanisms ◽  
Statics And Dynamics

This paper presents a method for complete force analysis, including both statics and dynamics, of overconstrained, statically indeterminate spatial mechanisms. Of primary concern is the development of a method which is realistic and has general applicability. The usual tacit assumption of the vanishing of certain force and torque components in the analysis, such as zero axial forces at joints, is removed. The method combines an analytical technique—using the [3 × 3] screw matrix method—coupled with an experimental method to completely specify the dynamic state of an overconstrained mechanism. The indeterminate force is modeled using a characteristic equation simulated experimentally. The method is illustrated in the case of the UNI-LAT coupling which is a modified Hooke-type joint. Based on the analytical results, some physical insights are interpreted. It was found that overclosure affects mechanism performance and plays an important role in the dynamics of the UNI-LAT coupling. General guidelines on the design of the UNI-LAT coupling are also presented.

Mechanics of Epicyclic Bevel-Gear Trains

1973 ◽  
Vol 95 (2) ◽  
pp. 497-502 ◽  
Author(s):  
A. T. Yang ◽  
F. Freudenstein
Keyword(s):  
Spur Gear ◽  
Bevel Gear ◽  
Inertia Force ◽  
Force Analysis ◽  
Gear Trains

The kinematics, statics, and inertia-force analysis of epicyclic bevel-gear trains have been described. Beginning with the general case of nonparallel, nonintersecting axes, the results are specialized to planetary bevel-gear trains. Dual (3 × 3) matrices have been found useful in the analysis, which is an outgrowth of earlier work on spur-gear trains.

STATIC FORCE ANALYSIS OF MECHANISMS WITH FOUR-BAR LINKAGES BASED ON FLEXIBILITY CONDITIONS

2005 ◽  
Vol 29 (4) ◽  
pp. 605-616
Author(s):  
Sureyya Sahin ◽  
Leila Notash
Keyword(s):  
External Loading ◽  
Static Force ◽  
Force Analysis ◽  
Spatial Mechanisms ◽  
The Matrix ◽  
Method Of Solution ◽  
Free Body ◽  
Four Bar Linkage ◽  
Additional Constraints ◽  
Structural Matrix

The four-bar linkages are widely used in both planar and spatial mechanisms and robotic manipulators. Static force analysis of the four-bar mechanisms subjected to spatial external loading working under gravitational forces is formulated in this article. The formulation is based on structural matrix force and stiffness methods with the free-body diagrams for each of the links considered. The four-bar mechanism considered is over-determined as there are additional constraints compared to a statically determined four-bar mechanism. A method of solution, based on the matrix force analysis, incorporating the flexibility of the mechanism is given. The methodology is simulated for a mechanism with a planar four-bar linkage where the plane of motion could be varied by rotating about a revolute joint that connects the four-bar linkage to the base.

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