Design and Analyzing Vibration
with Acoustic—Structural Coupling
of Muffler for Four-Stroke Diesel Engine
T. Sreedhar and B. Nageswara Rao
Abstract Muffler is one of the important devices in the exhaust system. This plays
a key role in reducing the exhaust gas noise and pressure, before when they are
expelled from the exhaust system. This noise comes from the exhaust manifold
which is due to the large pressure in the difference between atmosphere and exhaust
gases. For quite operation Muffler is used. In this paper, a muffler with selective
sound-absorbing material like carbon fiber and rockwool was used. Two different
mufflers (original and modified) are designed and modelled Creo2.0. Acoustic—
structural simulation is done for the two different models of muffler along with two
assigned sound-absorbing materials. The simulation results are explained that the
acoustic power level (dB) and frequencies are reduced for the modified model than
the original model when the Rockwool material is used.
Keywords Muffler · Carbon fiber · Rockwool · Creo2.0 and ansys
1 Introduction to Muffler
A muffler (silencer) is a very important noise controlling part for reduction of tackle
exhaust noise, fan noise, and unusual noise sources involving the flow of gases. The
reduction levels of those kinds of the muffler are enthusiastic about the frequency
of the noise supply. Investigations on absorption mufflers have indicated that these
have fairly smart noise decrease. The muffler is arranged in the middle of the engine
exhaust pipe and outlet pipe. In muffler, exhaust gases are permitted to increase
T. Sreedhar (B)
Department of Mechanical, VFSTR, Guntur, Andhra Pradesh, India
e-mail: sreedharthotti@gmail.com
B. Nageswara Rao
Department of Mechanical & Director IES, VFSTR, Guntur, Andhra Pradesh, India
e-mail: director_ies@vignan.ac.in
© The Editor(s) (if applicable) and The Author(s), under exclusive license
to Springer Nature Singapore Pte Ltd. 2021
N. Gascoin and E. Balasubramanian (eds.), Innovative Design, Analysis
and Development Practices in Aerospace and Automotive Engineering, Lecture Notes
in Mechanical Engineering, https://doi.org/10.1007/978-981-15-6619-6_27
255
with Acoustic—Structural Coupling
of Muffler for Four-Stroke Diesel Engine
T. Sreedhar and B. Nageswara Rao
Abstract Muffler is one of the important devices in the exhaust system. This plays
a key role in reducing the exhaust gas noise and pressure, before when they are
expelled from the exhaust system. This noise comes from the exhaust manifold
which is due to the large pressure in the difference between atmosphere and exhaust
gases. For quite operation Muffler is used. In this paper, a muffler with selective
sound-absorbing material like carbon fiber and rockwool was used. Two different
mufflers (original and modified) are designed and modelled Creo2.0. Acoustic—
structural simulation is done for the two different models of muffler along with two
assigned sound-absorbing materials. The simulation results are explained that the
acoustic power level (dB) and frequencies are reduced for the modified model than
the original model when the Rockwool material is used.
Keywords Muffler · Carbon fiber · Rockwool · Creo2.0 and ansys
1 Introduction to Muffler
A muffler (silencer) is a very important noise controlling part for reduction of tackle
exhaust noise, fan noise, and unusual noise sources involving the flow of gases. The
reduction levels of those kinds of the muffler are enthusiastic about the frequency
of the noise supply. Investigations on absorption mufflers have indicated that these
have fairly smart noise decrease. The muffler is arranged in the middle of the engine
exhaust pipe and outlet pipe. In muffler, exhaust gases are permitted to increase
T. Sreedhar (B)
Department of Mechanical, VFSTR, Guntur, Andhra Pradesh, India
e-mail: sreedharthotti@gmail.com
B. Nageswara Rao
Department of Mechanical & Director IES, VFSTR, Guntur, Andhra Pradesh, India
e-mail: director_ies@vignan.ac.in
© The Editor(s) (if applicable) and The Author(s), under exclusive license
to Springer Nature Singapore Pte Ltd. 2021
N. Gascoin and E. Balasubramanian (eds.), Innovative Design, Analysis
and Development Practices in Aerospace and Automotive Engineering, Lecture Notes
in Mechanical Engineering, https://doi.org/10.1007/978-981-15-6619-6_27
255