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ITS » Undergraduate Theses » Teknik Sistem perkapalan
Posted by dee@its.ac.id at 29/02/2012 14:09:33  •  366 Views


ANALISA TEGANGAN PISTON AKIBAT PENGURANGAN TEBAL PISTON HEAD PADA KONVERSI MESIN DIESEL MENJADI MESIN BAHAN BAKAR GAS

PISTON STRESS ANALYSIS CAUSE REDUCTION OF PISTON HEAD THICKNESS AT CONVERSION DIESEL ENGINE TO GAS FUEL ENGINE

Created by :
SEPTIAWAN, HENDRA  ( 4209105001 )



SubjectPembakaran
Bahan bakar motor
Alt. Subject Pistons
KeywordMesin diesel
Modifikasi piston
FEM.

Description:

Konversi mesin diesel menjadi mesin berbahan bakar gas mempunyai pengaruh terhadap proses pembakaran. Untuk dapat mengoptimalkan proses pembakaran pada bahan bakar gas harus mempunyai ruang bakar yang lebih besar. Pada penulisan ini dilakukan analisa tegangan pada piston original dan yang telah dimodifikasi. Tahapan pertama adalah pengumpulan data mesin, seperti tekanan pembakaran maksimal, dimensi piston, material piston, dan temperature maksimal silinder. Kemudian dilakukan pembuatan model piston pada softwere AutoCAD. Model yang sudah jadi dianalisa dengan menggunakan Finite Element Method (FEM). Langkah-langkah yang dilakukan untuk anlisa FEM yaitu pembentukan mesh, input material properties, boundry condition dan yang terakhir adalah analisa model. Karena ingin mengetahui tegangan piston, maka penganalisaan dilakukan pada kondisi torsi maksimal, dengan Compression Ratio (CR) yang bervariasi. Dengan adanya variasi CR tekanan maksimal pembakaran dan temperature maksimal pada piston juga akan bervariasi. Dari hasil analisa struktur tegangan terbesar yaitu 339 N/mm2 di daerah lubang pin piston, sedangkan temperature terbesar yaitu 969oC di daerah piston head. Pada CR 19 piston dapat menahan beban dari tekanan dan temperature.


Alt. Description

Diesel engine conversión to gas fuel engine make effect to combustión process. For optimizing combustión process at gas fuel, it must have a big combustión chamber. On this research conducted stress analysis at original piston and modification piston. First step are engine data collecting, such as maximal combustión pressure, piston dimensión, piston material and maximal temperature of cylinder. Then, makes piston model with AutoCad. Ready model will analize with finite element method (FEM). steps procedure for FEM analysis are mesh making, material properties input, boundry condition and finally model analizing. Because we want to know piston stress, analysis conducted at maximal torque condition with compression ratio (CR) variation. CR variation caused maximal pressure and maximal temperature also variated. From structure analysis result the largest stress is 339 N/mm2 at hole of piston pin zone, even though the largest temperature is 969oC at piston head zone. At CR 19 piston can stand the load from pressure and temperature.

Contributor:
  1. Semin, ST, MT, Ph.D.
  2. Ir. Aguk Zuhdi M.F, M.Eng, Ph.D.
Date Create:04/08/2011
Type:Text
Format:pdf
Language:Indonesian
Identifier:ITS-Undergraduate-3100012045677
Collection ID:3100012045677
Call Number:RSSP 621.437 Sep a


Source :
Undergraduate Thesis of Marine Engineering, RSSP 621.437 Sep a, 2012

Coverage :
ITS Community

Rights :
Copyright @2011 by ITS Library. This publication is protected by copyright and per obtained from the ITS Library prior to any prohibited reproduction, storage in a re transmission in any form or by any means, electronic, mechanical, photocopying, reco For information regarding permission(s), write to ITS Library


Publication URL :
http://digilib.its.ac.id/analisa-tegangan-piston-akibat-pengurangantebal-piston-head-pada-konversi-mesin-dieselmenjadi-mesin-bahan-bakar-gas-17853.html




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  2.  ITS-Undergraduate-17853-piston-stress-analysis-cause-reduction-of-pistonhead-thickness-at-conversion-diesel-engine-togas-fue.pdf - 61 KB
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