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PENGARUH EKSTRAK DAUN SIRIH MERAH (PIPER CROCATUM) TERHADAP PROFIL DARAH DAN KELULUSHIDUPAN IKAN MAS (CYPRINUS CARPIO) YANG DIINFEKSI BAKTERI AEROMONAS HYDROPHILA Syahida, Intan Eska Amalia; Sarjito, Sarjito; Prayitno, Slamet Budi; Lusiastuti, Angela Mariana
Journal of Aquaculture Management and Technology Vol 2, No 4 (2013) : Journal of Aquaculture Management and Technology
Publisher : Journal of Aquaculture Management and Technology

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Abstract

The study aimed was to know the influence of Piper crocatum exstract on the blood profile included total erythrocyte, total leukocyte, differential leukocyte (DL), phagocytosis indeks (IF) and survival rate of common carp (Cyprinus carpio) infected by Aeromonas hydrophila and the best concentration of P. crocatum for imunostimulatory common carp of infected A. hydrophila. The research was conducted at Research and Development of Freshwater Aquaculture, Bogor. The methods used in this research is experimental methods by using random design complete (RAL) with 4 treatments and three replicates. The research was conducted at Research and Development of Freshwater Aquaculture, Bogor. The treatments of different addition of P. crocatum exstract on fish feed, 0 gr/kg feed (treatment A), 5 gr/kg feed (treatment B), 10 gr/kg feed (treatment C), 15 gr/kg feed (treatment D). The treatnent was given 21 days. The research results obtained additional P. crocatum exstract significantly different effect (P0,05) on percentage of netrofil (2%) and survival rate of common carp (C. carpio) infected by A. hydrophila (40%), the best concentration of P. crocatum on feed for immunostimulant common carp of infected A. hydrophila, the result showed the best dose 5 g/kg feed
PENGARUH EKSTRAK DAUN SIRSAK (ANNONA MURICATA) TERHADAP PROFIL DARAH DAN KELULUSHIDUPAN IKAN MAS (CYPRINUS CARPIO) YANG DIINFEKSI BAKTERI AEROMONAS HYDROPHILA Nurjannah, R. Dewi Dharina; Prayitno, Slamet Budi; Sarjito, Sarjito; Lusiastuti, Angela Mariana
Journal of Aquaculture Management and Technology Vol 2, No 4 (2013) : Journal of Aquaculture Management and Technology
Publisher : Journal of Aquaculture Management and Technology

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Abstract

Carp is a freshwater species that is easily cultivated. One of the constraints in cultivating carps (C. carpio) is diseases that ultimately caused mass mortality. The disease that generally affects carp is Motile Aeromonas Septicemia (MAS) caused by Aeromonas hydrophila. Soursop leaves is one of the herbs that can be used as an ingredient to control fish diseases because it contains chemicals that acts bacteriocide. The purpose of this research was to determine the influence and the best dose of soursop leaf extract in feed to the blood profile and survival of carp infected by A. hydrophila. The treatments of this research were addition of soursop leaf extract on feed with 4 different dosages and 3 replicates. The treatments were A (0 g/kg diet), B (5 g/kg diet), C (10 g/kg diet) and D (15 g/kg diet). The result showed that soursop leaf extract in feed of treatment B (5 g/kg diet) significantly different (P0.05) on total erythrocyte (0.83×106 cells/mm3), differential leukocyte include the percentage of monocytes (7.67%), neutrophils (8.67%), lymphocytes (83.67%), phagocytic activity (37%) and survival rate (50%). It can be conclude that soursop leaf extract at dosage 5g/kg was able to stimulate immune response of carp, it was characterized by an increased total leukocytes of carp infected by A. hydrophila.
PENGARUH PENGGUNAAN EKSTRAK DAUN JERUJU (ACANTHUS ILICIFOLIUS) DENGAN DOSIS BERBEDA TERHADAP GAMBARAN DARAH, GEJALA KLINIS DAN KELULUSHIDUPAN LELE DUMBO (CLARIAS GARIEPINUS) YANG DIINFEKSI AEROMONAS HYDROPHILA Ziyadaturrohmah, Siti; Prayitno, Slamet Budi; Sarjito, Sarjito; Hidayati, Nurul; Saptiani, Gina
Journal of Aquaculture Management and Technology Vol 2, No 4 (2013) : Journal of Aquaculture Management and Technology
Publisher : Journal of Aquaculture Management and Technology

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Abstract

Aeromonas hydrophila is a causative agent of Haemoragic Septicemia on Clarias gariepinus. The aim of this research was to investigate the effect of Acanthus ilicifolius leaf extract toward survival rate of C. gariepinus infected by A. hydrophila. Tested fish C. gariepinus 10-12 cm and weight ±25 gr. This reasearch was conducted by 4(four) treatments namely, A (treatment with no leaf ectract A. ilicifolius), B (300 ppm), C (500 ppm), and D (700) 30 minutes immersion. The challenge test was done by injecting 0,1 mL A. hydrophila suspensions with dosage 108 cell/mm3 intra-muscular by experiment fishes. Observation was performed for 5 days after infection such as blood profile, clinical symptoms, and survival rate of C. gariepinus. The results of blood profile after the infection showed that hematokrit of A, B, C, and D treatments was 17,33%, 14,67%, 15,00%, 19,67% respectively. Percentage of the highest erythrocyte was at D treatment 1,79x106 sel/mm3, B 1,72 x106 sel/mm3, A 1,64x106 sel/mm3, C 1,52x106 sel/mm3. Percentage of the highest leuchocyte was at C treatment 5,43x104 sel/mm3, D 3,11x104 sel/mm3, B 2,63x104 sel/mm3, and A 2,32x104 sel/mm3. The result showed that clinical symptoms of A. hydrophila infected fish swam abnormally, injured and haemoragic on the skin along with damaged on the body. Immersion with A. ilicifolius extract leaf past infection indicated that they were not significantly different on C. gariepinus survival rate. Therefore the dosage of A. ilicifolius leaf extract did not sufficient to protect C. gariepinus from A. hydrophila infection.
PEMANFAATAN FENOMENA PERTUMBUHAN COMPENSATORY PADA BUDIDAYA IKAN NILA MERAH (OREOCHROMIS NILOTICUS) Santoso, A.; Djunaedi, Ali; Sarjito, Sarjito
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 7, No 2 (2002): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (454.196 KB) | DOI: 10.14710/ik.ijms.7.2.121-126

Abstract

Penelitian dilakukan untuk melihat fenomena pertumbuhan compensatory pada pemeliharaan ikan nila merah (O. niloticus). Penelitian skala laboratorium dilakukan dari pertengahan Agustus sampai pertengahan Oktober 2001, di hatchery Ilmu Kelautan FPK Undip, Teluk Awur, Jepara. Benih ikan nila merah (berat rata­rata 37,74±1,16 gr) yang berasal dari Balai Benih Ikan yang sebelumnya diaklimatisasikan pada kondisi laut dipelihara dalam bak-bak percobaan (kepadatan 5 ekor/m3). Masing-masing bak percobaan berlsi 12 ekor ikan. Perlakuan pemuasaan diberikan dengan 3 kali pengulangan selama satu bulan percobaan, yaitu: ikan diberi pakan setiap hari (A/kontrol): ikan diberi pakan selama 6 hari diikuti pemuasaan 1 hari (B): ikan diberi pakan selama 5 hari diikuti pemuasaan 2 hari (C); ikan diberi pakan selama 4 hari diikuti pemuasaan 3 hari (D). Pakan diberikan 2x sehari sebanyak 5% dari biomassa. Hasil penelitian menunjukkan bahwa ikan pada semua perlakuan mengalami pertumbuhan, sebagai berikut, 7,42 gr/minggu (A), 7,18 gr/minggu (B), 3.44 gr/minggu (e), dan 5,34 gr/minggu (D). Meskipun tingkat pertumbuhan berbeda, tetapi secara statistik tidak ada perbedaan dalam tingkat pertumbuhannya. Hasil ini menunjukkan telah terjadi pertumbuhan compensatory. dan kemungkinan adanya penghematan pakan sebesar 14 - 43%.Kata kunci: nila merah, pertumbuhan ompensatory, tingkat pertumbuhan  The experiment was done to investigate compensatory phenomenon on the of red tilapia (O. niloticus). The experiment was prepared and commenced from the mid of A ugust to the the mid of October 2001 at the hatchery of Marine Science, Undip, In Teluk Awur Jepara, under the laboratory condition. Red tilapias of mean weight of 37.74 g ÷SD 1.16 obtained from the Hatchery were acclimated in seawater conditions. The fish were cultured in the tanks with a density of 5 fish/m3 (12 fish/tank). The treatments were feeding dally (A/control): fish fed 6 days-a day unfed (B),·fish fed 5 days-2 days unfed (C): and fish fed 4 days-3 days unfed (D). Feeding frequency was twice a day with 5% of the biomass. The results showed that all of the fish at the different treatment tended to grows: and the growth rates were A)7.42 g/week, B)7.18 g/week. C)3.44 g/week and D)5.34 g/week. Satistically, however there was no significant difference of the growth rate among the fish (Ancova). The results also suggested that the compensatory growth occurred, and there was a possibility to save the foods about 14 to 43%.Keywords: red tilapia, compensatory growth, growth rate
FENOMENA PERTUMBUHAN COMPENSATORY DAN KUALITAS IKAN NILA MERAH (OREOCHROMIS SP.) PADA KONDISI LAUT Santoso, Adi; Sarjito, Sarjito; Djunaedi, Ali
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 11, No 2 (2006): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (171.533 KB) | DOI: 10.14710/ik.ijms.11.2.106-111

Abstract

Penelitian skala laboratorium untuk mengevaluasi fenomena pertumbuhan compensatory dan kualitas produk (body composition) dari nila merah (Oreochromis sp.) yang dipelihara di air laut dilakukan pada awal Juni sampai awal Agustus 2003 di Hatchery Kampus Kelautan Teluk Awur Jepara FPIK UNDIP. Benih ikan (37,74gr + SD 1,16gr) sebelumnya diaklimatisasikan pada kondisi laut dan dipelihara dalam bak-bak percobaan dengan kepadatan 5 ekor/m3. Perlakuan pemuasaan dengan 3 kali ulangan selama 4 minggu percobaan, yaitu: ikan diberi pakan setiap hari (A/kontrol); diberi pakan selama 6 hari diikuti pemuasaan 1 hari (B); diberi pakan selama 5 hari diikuti pemuasaan 2 hari (C); dan, diberi pakan selama 4 hari diikuti pemuasaan 3 hari (D). Pakan berbentuk pellet tenggelam (PT CP Prima) dengan kandungan protein 24-26%, lemak 3-5%, serat kasar 4-6%, abu 5-8% dan air 11-13%, diberikan 2 kali sehari sebanyak 5% dari biomassa. Pengamatan pertumbuhan dilakukan seminggu sekali. Analisa body composition dilakukan untuk mengukur kandungan protein, lemak, karbohidrat dan air (%). Hasil penelitian memperlihatkan bahwa tidak terjadi perbedaan dalam pertumbuhan selama percobaan; hal ini menunjukkan terjadi fenomena pertumbuhan compensatory. Tingkat pertumbuhanpada masing-masing perlakuan yaitu 7,42 gr/minggu (A); 7,18 gr/minggu (B); 3,44 gr/minggu (C); dan, 5,34 gr/minggu (D). Analisis body composition tidak menunjukkan adanya perbedaan dalam kandungan protein, lemak, karbohidrat, maupun air. Kandungan protein normal (>18%). Kandungan lemak rendah, 1,50-1,80%, diikuti kandungan air yang tinggi (>70%), yang menyebabkan tekstur daging lebih lunak. Kandungan karbohidrat 2,7-4,8%.Kata kunci: nila merah, pertumbuhan compensatory, kuantitas, kualitasThe study to evaluate both compensatory growth phenomenon occurred and the fish quality (body composition) were done under the laboratory conditions from beginning June to beginning August 2003 at the hatchery of Marine Science Teluk Awur-Jepara Campus, Diponegoro University. Red tilapias of mean weight of 37.74g+SD 1.16 g were acclimated in seawater conditions. The fish were cultured in the tank with a density of fivefish/m3 The treatments were feeding daily (A/control); fish fed 6 days?a day unfed (B); fish fed 5 days-2 days unfed; and fish fed 4 days-3 days unfed (D). The food was slowly sinking type (CP Prima) containing protein24-26%, oil 3-5%, fibre 4-6%, ash 5-8%, and water 11-13%. Feeding frequency was twice a day with 5% of the biomass. Growth was measured weekly. For fish quality analysis (body composition), it was done tomeasure the contents of protein, fat, carbohydrate, and water (%). The result showed that there was no significant difference of the growth among the fish (ANOVA); and, in turn, it suggested that the compensatorygrowth was occurred. The growth rates were 7.42 g/week (A), 7.18 g/week (B), 3.44 g/week(C), and 5.34 g/week (D). There was no difference for the contents of protein, fat, carbohydrate, and water. In general, theprotein content was above 18%.The low fat contents (1.50-1.80%) was followed by the high water contents (>70%), so that it made the flesh texture being soft. The carbohydrate contents were 2.74 to 4.8%.Key words: red tilapia, compensatory growth, quantity, quality
CAUSATIVE AGENT VIBRIOSIS DARI KERAPU BEBEBK (CROMILEPTIS ALTIVELIS ) : 2. KAKARKTERISASI SECARA MOLEKULER BERBASIS 16 S RDNA Sarjito, Sarjito
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 16, No 4 (2011): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (691.663 KB) | DOI: 10.14710/ik.ijms.16.4.229-235

Abstract

Ikan Kerapu Bebek (Cromileptis altivelis) sakit diperoleh dari keramba jaring apung di Karimunjawa. Penelitian ini bertujuan untuk mengkaji causative agent utama vibriosis pada ikan kerapu bebek  (C. altivelis) dari  karamba jaring apung di perairan Karimun Jawa.  Sebanyak tujuh isolat vibrio diisolasi dari bagian luka maupun ginjal kerapu bebek sakit yang menunjukkan gejala vibriosis.  Hasil uji postulat koch dan pathogenisitasnya dari enam isolat,  diperoleh bahwa tiga isolat (isolat  JT 07; JT 10 dan JT 20 ) yang mengakibatkan 100% dan merupakan agensia penyebab utama vibriosis pada ikan Kerapu Bebek . Oleh karena itu,  pada penelitian ini hanya tiga isolat ini yang akan dilakukan uji selanjutnya. Teknik  molekuler gen 16S rDNA (amplifikasi 16S DNA ribosom) digunakan untuk karakterisasi ketiga causative agent utama secara komprehensif. Berdasarkan analisis sekuen gen 16S rDNA, data menunjukkan bahwa isolat JT 07 memiliki kekerabatan terdekat dengan Vibrio olivaceus (99%); isolat JT 10 dengan  V. damsella (99%)  dan isolat JT 20  dengan  V. alginolyticus  (98%). Kata kunci:  causative agent, Vibriosis,  molekuler,  Kerapu bebekMoribound Humpbeck Grouper fish (Cromileptis altivelis) was taken from the cages of Karimunjawa. The research aim was to find out the main causative agent of vibriosis on humpbeck grouper (C. altivelis)  from Karimunjawa waters. Seven  isolates of Vibrio were isolated from external wound and kidney of the humpbeck grouper fish (C. altivelis) which showed the clinical signs of vibriosis. Based on the koch postulate and pathogenecity test results indicated that three vibrios  (isolate JT 07; JT 10 and JT 20 ) act as a main causative agents of vibriosis which caused mortality of  100% to E. fuscogutatus.  Because of highest mortality as pathogenicity indicator, the three isolates were continued to investigate. A complementary molecular techniques of 16S rDNA genes (amplified 16S ribosomal DNA) was used to give a comprehensive characterization of these isolates.  On the basis of the results of sequen analysis, our data showed that JT 07; JT 10 and JT 20 isolates were closely related to Vibrio olivaceus (99.0%); V. damsella (99%)  and  V. alginolyticus  (98%) respectively.. Key Words : Causative agent, Vibriosis, molecular,  humpbeck grouper  
PERFORMA PERTUMBUHAN IKAN LELE(CLARIAS GARIEPINUS, BURCHEL) YANG DIBUDIDAYAKAN SECARA SUPERINTENSIF MELALUI APLIKASI SISTEM IMTA DENGAN CACING TUBIFEX DI BOYOLALI GROWTH PERFORMANCES OF CATFISH (CLARIAS GARIEPINUS, BURCHEL) CULTIVATED SUPERINTENSIF THROUGH APPLICATION OF IMTA WITH TUBIFEX WORM SYSTEM IN BOYOLALI Hastuti, Sri; Subandiyono, Subandiyono; Sarjito, Sarjito
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 12, No 1 (2016): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (78.347 KB) | DOI: 10.14710/ijfst.12.1.30-34

Abstract

 Usaha  budidaya ikan di Boyolali mampu memberikan pendapatan dari usaha budidaya lele dengan hasil yang menjajikan. Usaha lele tersebut mampu memberikan kontribusi terhadap pendapatan rumah tangga sebesar 54% hingga 100%. Nilai R/C rasio lebih besar 1, yang berarti  bahwa usaha tani budidaya ikan lele tersebut efisien dan layak untuk dikembangkan. Ketenaran Kabupaten Boyolali akan hasil budidaya ikan lele yang menjajikan secara ekonomi telah memacu penduduknya untuk memproduksi ikan lele.Hasil produksi ikan lele di Boyolali secara nyata dipengaruhin oleh variabel luas lahan dan variabel benih lele.Oleh karena itu, keterbatasan lahan yang dimiliki oleh para usahatani Sumber Rejeki tersebut menjadi permasalahan yang perlu dipecahkan.Untuk memaksimumkan produksi lele dengan lahan terbatas tersebut dapat dilakukan dengan teknologi IMTA (Integrated Multi TrophicAquaculture). Teknologi ini menggabung ikan lele dengan cacing tubifec, sehingga akan menghasilkan ikan lele dan tubifek.Namun kegiatan budidaya sistem IMTA yang menggabungkan antara ikan lele dengan cacing Tubifek masih tergolong belum pernah dilakuakan oleh para petani.Sistem IMTA ini memiliki beberapa kelebihan, yaitu (1) meningkatkan efisiensi input dan output yang menghasilkan kenaikan nilai ekonomis, karena dihasilkan ikan lele dan cacing tubifek. (2) memperbaiki atau meminimalisir limbah buangan kegiatan budidaya ikan, (3) meningkatkan kemanfaatan limbah kegiatan budidaya ikan yang potensial sebagai pupuk organik untuk proses produksi Tubifec.  Benih lele berukuran bobot 1,5±0,1 g dipelihara dengan kepadatan 500 ekor per meter persegi.  Selama pemeliharaan 3 bulan, ikan diberi pakan pelet komersial untuk lele secara ad satiationdengan frekwensi dua kali sehari.  Pada bagian atas kolam dilengkapi dengan talang bertingkat sebagai tempat pemeliharaan tubifec.  Air dari kolam dipompa ke atas talang atau wadah cacing tubifec.  Hasil pemeliharan diperoleh ikan lele dengan pertumbuhan relatif sebesar 72,96 g% perhari dan angka kelngsungan hidup mencapai 96,66% dan nilai FCR sebesar 1.  Selama satu bulan, Tubifec mengalami pertumbuhan sebesar 66,66%     Fish farming in Boyolali are able to provide income from catfish culture with promising results. The catfish effort to contribute to the household income by 54% to 100%.  Rated R / C ratio is greater than 1, which means that the catfish farming are efficient and feasible to develop.  The Boyolali was known as location of catfish production and  that will be farmed economically promising has spurred citizens to produce catfish.  The production of catfish in Boyolali significantly was affectedby land area and seed catfishvariable.  Therefore, the limited land owned by the farmers ?Sumber Rejeki? isa problem that needs to be solved. To maximize the production of catfish with limited space can be done throughIMTAtechnology (Integrated Multi TrophicAquaculture). This technology merge catfish with tubifex worms, so it will produce catfish and tubifex. However, farming activities with IMTA system that combines catfish with worms tubifex still relatively rare by farmers.   IMTA system has several advantages, (1) improve the efficiency of inputs and outputs that result in increased economic value, as produced catfish and worm tubifex. (2) correct or minimize waste from fish farming activities, (3) increase the utilization of the fish farming waste as an organic fertilizer for the tubifex production process.  Sized catfish seed weight of 1.5±0.1 g maintained at densities of 500 individuals per square meter. During the three-month rearing time, fish fed a commercial pellet for catfish ad satiation with a frequency of twice a day.At the top of the catfish pondwas put the equipment with arranged adouble level drine pipe as a tubifec pond culture. The water from the catfish pond is pumped to the top drine pipe or worm tubifecrearing tank. Results of the catfish farming wtih IMTA system were relative growth rate of catfish i.e. 72.96 g% daily and survival rate  reached 96.66% and FCR value is 1. During one month, tubifex grow were66.66% 
PENGARUH BENTUK RUNNER INTAKE MANIFOLD TERHADAP POLA ALIRAN FLUIDA DENGAN MENGGUNAKAN COMPUTATIONAL FLUID DYNAMICS Aklis, Nur; Sarjito, Sarjito; Syah, Agus Pranoto
Media Mesin VOL 16, NO 1 (2015)
Publisher : Program Studi Teknik Mesin UMS

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Abstract

Intake manifold merupakan salah satu komponen yang sangat penting. Fungsi intake manifold adalah untuk menghantar udara ke silinder atau ruang bakar, posisi dan sudut belokan pada runner sangat berpengaruh terhadap kesempurnaan pencampuran bahan bakar didalam silinder atau ruang bakar. Tujuan penelitian dalam tugas akhir ini adalah untuk mengetahui perbedaan karakteristik aliran fluida, keseragaman pendistribusian aliran fluida dimasing-masing runner dan untuk mengetahui tingkat turbulensi aliran fluida pada silinder atau ruang bakar pada intake manifold standar dan setelah dimodifikasi.               Penelitian dilakukan dengan merubah geometri sudut runner intake manifold standar yang memiliki sudut 80o menjadi 65o. Desain pembuatan intake manifold dengan menggunakan software solidworks 2013.               Dari hasil simulasi CFD didapat nilai-nilai kecepatan dan penurunan tekanan pada outlet dimasing-masing runner yang menunjukkan perbedaan antara intake manifold standar dan setelah dimodifikasi. Berdasarkan hasil simulasi menunjukkan perbedaan pusaran (vortex) yang terjadi didalam silinder atau ruang bakar antara intake manifold standar dan setelah dimodifikasi. 
DESAIN DAN OPTIMISASI SISTEM SUSPENSI PEGAS DAUN PADA KENDARAAN RODA 3 DENGAN MENGGUNAKAN CATIA V5 Lukman, Lukman; Anggono, Agus Dwi; Sarjito, Sarjito
TURBO [Tulisan Riset Berbasis Online] Vol 7, No 1 (2018): Juni 2018
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v7i1.665

Abstract

Pengurangan berat bahan pada komponen kendaraan merupakan salah satu isu yang ada di dunia industri otomotif. Suspensi pegas daun merupakan salah satu item potensial untuk menurunkan berat kendaraan karena menyumbang 10% - 20% dari berat unsprung weight. Tujuan penelitian ini adalah untuk melakukan optimisasi desain pegas daun dan analisa statik pegas daun pada kendaraan roda 3. Optimisasi desain dilakukan dengan Design of Experiment (DOE) pada pegas daun Original dengan tiga variasi desain masing-masing yaitu modifikasi 1, modifikasi 2 dan modifikasi 3. Modifikasi 1 dilakukan dengan pengubahan desain tanpa menggunakan alur/slot, Modifikasi 2 dilakukan dengan pengubahan desain dengan menggunakan 3 alur/slot , dan Modifikasi 3 dilakukan dengan pengubahan desain dengan menggunakan 1 alur/slot. Metode penelitian ini dilakukan dengan menggunakan konsep reverse engineering yang diawali dengan mengumpulkan data-data geometri pegas daun pada kendaraan roda 3. Data-data tersebut dipakai sebagai acuan dalam mendesain komponen mengunakan software CATIA V5. Assembly komponen menjadi kesatuan dilakukan setelah semua bagian sistem pegas daun selesai digambar. Setelah gambar desain dihasilkan pada CATIA V5 tersebut, dilakukan analisa tegangan Von Mises dan displacement yang terjadi pada 3 variasi mesh dan variasi beban 2550 N, 2648 N, 2746 N, 2844 N, 2942 N, 3040 N, 3138 N, 3236 N, 3334 N, dan 3432 N. Hasil analisis tegangan Von Mises dan displacement pada 3 modifikasi pegas daun dengan variasi 3 mesh dapat disimpulkan bahwa perbandingan antara tegangan von mises dan variasi beban adalah linier yaitu semakin berat beban maka tegangan von mises akan semakin besar dan semakin banyak elemen maka tegangannya juga semakin besar. Pada 3 modifikasi pegas daun yang telah dibuat bahwa pegas dengan tanpa alur pada modifikasi 1 memiliki tegangan von mises paling tinggi dibandingkan dengan pegas daun yang dibuat beralur/slot. Dan pegas daun modifikasi 3 yang menggunakan 1 alur/slot menghasilkan tegangan von mises dan displacement yang lebih rendah dari modifikasi 1. Pegas daun modifikasi 2 yang menggunakan 3 alur/slot menghasilkan tegangan von mises dan displacement yang lebih rendah dari modifikasi 3.Keywords: Pegas Daun, Metode Elemen Hingga, Simulasi, Analisa Statik, Von Mises, CATIA
STUDI KARAKTERISTIK AIRFOIL NACA 2410 DAN NACA 0012 PADA BERBAGAI VARIASI ANGLE OF ATTACK Sarjito, Sarjito
Media Mesin: Majalah Teknik Mesin Vol 11, No 1 (2010)
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

In the past, for making and investigating performance of airfoil should be conducted by trial and error, and often a lot of materials waste. Since every time, if we would like to change of the model, we have to produce new model first for doing next investigation. Beside that, for testing the airfoil should be physically done in the wind tunnel, it is not very easy to get information of pressure and velocity distribution accurately. Now adays, it can be done computationally, faster and cheaper by using both of open sources and commercial software. The aim of this research is to investigate the characteristics of airfoil performance. It covers the pressure distribution, velocity around the airfoil, and visualization of trajectories. Comparison between symmetric airfoil NACA-0012 and asymmetric airfoil NACA2410 performance will be explained, especially relationship between CL, CD versus a computationally. Experiment is preceded by making of symmetric airfoil model as well as asymmetric airfoil model by using design foil open source software, and then for adjusting angle of attach was assisted by the AutoCAD software, after that, meshing and solving process to be done in the Solid Work Cosmos Flow software 2007. Analysis covers distribution of pressure, velocity and trajectories simulation. The result of the research shows, that increasing of angle of attach will be followed by increasing of lift coefficient polynomially, other than coefficient lift is drag coefficient which proportional with angle of attach. However, it can be seen that NACA-0012 has the higher coefficient of lift and drag coefficient than NACA-2410. These patterns has also be compared with U.S Department of Transportation Federal Aviation document, apparently there has similar trend each others