MODEL AND STATIC ANALYSIS OF MUFFLER GUARD – Mechanical Project

ABSTRACT
In recent years, the influence of automobile emissions and noise on the environment has become an increasingly serious problem. Particularly, exhaust
system is known to be a predominant component of the automobile emissions and noise. Fortunately, over the last few decades, engine exhaust noise is controlled through the use of silencers or mufflers. Mufflers are installed within the exhaust system of most internal combustion engines. The muffler is engineered as an acoustic soundproofing device designed to reduce the loudness of the sound pressure created by the engine by way of acoustic quieting. We can install an aftermarket muffler when engine tuning in order to increase power output or reduce fuel consumption because of economic or environmental concerns. Here in this project we designed a muffler model by using solid works design software and done analysis by using various materials such as stainless steel, 2014 aluminum alloy and titanium alloy. We have done static analysis to find the maximum stresses and deformations of muffler and
modal analysis to find natural frequencies and deformations induced in muffler these analyses are done in solid works simulation tool, various commands, different types of analysis and material properties are studied in this project.

INTRODUCTION:
Mufflers are installed within the exhaust system of most internal combustion engines, although the muffler is not designed to serve any primary exhaust function. The muffler is engineered as an acoustic soundproofing device designed to reduce the loudness of the sound pressure created by the engine
by way of acoustic quieting. The majority of the sound pressure produced by the engine is emanated out of the vehicle using the same piping used by the silent exhaust gases absorbed by a series of passages and chambers lined with roving fiberglass insulation and/or resonating chambers harmonically tuned to
cause destructive interference wherein opposite sound waves cancel each other out. An unavoidable side effect of muffler use is an increase of back pressure which decreases engine efficiency. This is because the engine exhaust must share the same complex exit pathway built inside the muffler as the
sound pressure that the muffler is designed to mitigate.

design and analysis of muffler guard mechanical project
design and analysis of muffler guard mechanical project

Two different modeling techniques are considered:
(1) First, the procedure described in previous works, 3D ducts/3D monolith, in which the finite element method leads to the calculation of the three dimensional three dimensional acoustic field inside the complete catalytic converter.

(2) On the other hand, the proposed technique in thesis, 3D ducts/1D monolith, in which the monolith is replaced by a plane wave transfer matrix, that is,
only one-dimensional acoustic behavior is allowed within the capillary ducts. The results provided by both approaches are compared with experimental measurements, showing that the latter technique exhibits a better arrangement

THE AUTOMOTIVE EXHAUST SYSTEM.

Keeping your exhaust system in good working condition is vital for fuel mileage, the environment and your safety. We will discuss how the exhaust
system works, how it usually fails, and the best way to repair it. Your car’s exhaust system carries away the gases created when the fuel and air are burned in the combustion chamber. These gases are harmful to humans and our environment. Frequent checks of your exhaust system are a must to provide for you and your family’s safety. Make sure there are no holes in the exhaust system or in the passenger compartment where exhaust fumes could enter. Let’s
begin by listing the parts of the exhaust system and their functions.

Conclusion
1. Design and analysis of agricultural engine muffler is done in solid works
2. Designing is completed with proper dimensions of agricultural engine muffler.
3. Three materials were selected for analysis those materials are stainless steel and 2014 aluminum alloy and titanium alloy.
4. Static analysis is carried out to find out the induced stress generated in the muffler due to exhaust process
5. Frequency analysis is carried out to obtain the natural frequencies values and mode shapes values to reduce the vibrations in the agricultural engine muffler.
6. By checking the static results the stain less steel material model has shown high stress and deformations compared with the 2014 aluminum alloy and titanium alloy model.
7. From the results we can conclude that the titanium material is showing less stress and deformation compared to remaining materials.
8. By comparing the natural frequencies values at different modes the min and max operating frequency ranges 540-1900Hz and the stainless steel has highest operating frequency range.

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MODEL AND STATIC ANALYSIS OF MUFFLER GUARD – Mechanical Project

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