**5. Nomenclature**

14 Mechanical Engineering

**Σ 100% 3D** *Design* 

70%

55%

28%

Fig. 12. Relation of design activities and reducing of time spent for design by parameter


We can conclude that CATIA V5 system offers possibility of geometric association creation defined by relations established between parameters. Therefore, components parameterisation must obligatory apply in combination with today's traditional geometric modelling approach. Direct financial effects can be seen in production costs reduction, which increases the productivity. Therefore profit is bigger and price of products are lower.

Obtained 3D model from CATIA V5 system is used as the base for technical documentation making, analysis of stress and deformation by *Finite Element Method* (FEM), generating of NC/CNC programs for production of the parts on machine (CAM/NC), *Rapid Prototyping*

Researches were partially financed by WUS Austria under supervision of Austrian Ministry

**Preparation Designing phase Changing phase** 

20%

10% **Σ 50%** 

**Σ 80%**

28%

2%

*Software*

**Basic CATIA V5 use** 

Relation of design activities

modelling

**CATIA V5 parameter approach** 

reconfiguration),

(Saric et al., 2010)

**4. Acknowledgment** 

(RP), etc.

5%

12%

These are the advantages of parameter modelling use:


of foreign affairs as the part of CDP+ project (No. project: 43-SA-04).


**1. Introduction** 

**2.1 Transmission error** 

network based diagnostic/prognostic processes.

**2. Key elements in gearbox simulation** 

**2** 

**Gearbox Simulation Models** 

*2Prince Mohammad Bin Fahd University (PMU), Mechanical Engineering Department, AlKhobar* 

Endo Hiroaki1 and Sawalhi Nader2

*1Test devices Inc.,* 

*1USA 2Saudi Arabi* 

 **with Gear and Bearing Faults** 

Simulation is an effective tool for understanding the complex interaction of transmission components in dynamic environment. Vibro-dynamics simulation of faulty gears and rolling element bearings allows the analyst to study the effect of damaged components in controlled manners and gather the data without bearing the cost of actual failures or the expenses associated with an experiment that requires a large number of seeded fault specimens. The fault simulation can be used to provide the data required in training Neural

Gears, by their inherent nature, cause vibrations due to the large pressure which occurs between the meshing teeth when gears transmit power. Meshing of gears involves changes in the magnitude, the position and the direction of large concentrated loads acting on the contacting gear teeth, which as a result causes vibrations. Extended period of exposure to noise and vibration are the common causes of operational fatigue, communication difficulties and health hazards. Reduction in noise and vibration of operating machines has

Design and development of quieter, more reliable and more efficient gears have been a popular research area for decades in the automotive and aerospace industries. Vibration of gears, which directly relates to noise and vibration of the geared machines, is typically dominated by the effects of the tooth meshing and shaft revolution frequencies, their harmonics and sidebands, caused by low (shaft) frequency modulation of the higher toothmesh frequency components. Typically, the contribution from the gear meshing components dominates the overall contents of the measured gearbox vibration spectrum (see Figure-2.1.1). Transmission Error (TE) is one of the most important and fundamental concepts that forms the basis of understanding vibrations in gears. The name 'Transmission Error' was originally coined by Professor S. L. Harris from Lancaster University, UK and R.G. Munro,

been an important concern for safer and more efficient machine operations.

