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Djatmiko, Agus Budi
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Perancangan Tabung Motor Roket RX 250 Akibat Laju Perpindahan Panas dan Tekanan rahmasari, fauzhia; Djatmiko, Agus Budi; Digdoyo, Aji; Yuniaty, Erma; Kurniawati, Nani; Artana, I Nyoman; Setiohadi, Bagas
Jurnal Teknologi Vol. 11 No. 1 (2023): JURNAL TEKNOLOGI
Publisher : Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31479/jtek.v11i1.270

Abstract

AbstrakTabung motor roket salah satu komponen roket yang sangan penting. Oleh karena fungsinya, tabung motor roket harus benar-benar mempunyai faktor keamanan yang cukup baik. Kenaikan tekanan dan temperatur dalam tabung dapat menimbulkan pembebanan atau gaya pada tabung motor roket ke arah radial dan aksial dan juga menimbulkan gaya akibat tegangan panas. Temperatur gas yang dihasilkan akibat pembakaran cukup tinggi, sehingga dapat menyebabkan tegangan pada material tabung motor roket, untuk itu perlu dianalisa lebih lanjut agar mendapatkan kinerja roket yang lebih baik. Dalam penelitian ini dibahas mengenai perancangan pada tabung motor roket RX 250 LAPAN akibat beban tekanan dan termal akibat gas pembakaran. Pada perancangan ini digunakan bahan dari AISI 1045 dengan .Hasil perancangan terhadap tabung motor roket RX 250 LAPAN didapat besarnya tegangan akibat tekanan 40 bar, didapat sebesar , tegangan akibat panas adalah , dan tegangan total yang terjadi adalah , dengan faktor keamanan sebesar SF = 2.4. Hal ini aman bagi tabung motor roket RX 250.Kata Kunci: Tegangan tabung, tekanan ruang bakar, temperatur
Research on the Transmissibility of Wire Rope Insulators as Damping Equipment on the RX 200 Rocket Payload Djatmiko, Agus Budi; Ediwan, Ediwan; Ronald, Ronald; Putra, Gunawan
Indonesian Journal of Aerospace Vol. 19 No. 1 (2021)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2021.v19.a3556

Abstract

Wire rope insulator or steel wire rope insulator has applications for vibration isolation in equipment and structures in many industrial machinery. Steel wire rope insulators can also be used as suitable equipment to dampen vibrations in rocket loads. The disturbance acceleration as the excitation caused by the combustion process on the rocket can cause a vibration with a large amplitude which results in damage to the rocket's payload structure and the electronic equipment on the rocket's payload cannot work as desired. Based on the experience of electronic equipment, it will be damaged if the disturbance acceleration of 3 g acting on the rocket is not reduced, for this reason a vibration damping device is designed, the apparatus consists of several stainless steel wire ropes tied between two parallel binders arranged in such a way as to provides a damping effect on the rocket's payload. A wire rope insulator consists of several stainless steel wire ropes tied between two parallel straps. One application of this type of wire rope insulator is to isolate the vibrations that occur in the rocket, so that it does not interfere with the performance of the electronic equipment on the rocket's payload. Electronic equipment is used to determine the position of the rocket and its stability. In this study, the wire rope material used is stainless steel with syield = 350 e+6 N / m2 with a diameter of d = 3 mm. The research objective of the vibratory damper of wire rope insulators was to determine the magnitude of the transmissibility of the ruffler during and after resonance. Transmissibility (TR) is the ratio of the force transmitted to the disturbing or excitation force. The results of the research on a damper with a disturbance acceleration of 3 g at resonance, obtained the transmissibility value (TR) = 2.54, the spring stiffness k = 200537.3 N/m and the damping coefficient c = 331.5 N/m/sec, then after conditions  obtained transmissibility (TR) <1 This shows that the damper with steel wire isolator is good enough to dampen vibrations in the RX 200 rocket payload.
PERANCANGAN SISTEM PEREDAM GETARAN PADA MUATAN ROKET RX 320 LAPAN Djatmiko, Agus Budi
Indonesian Journal of Aerospace Vol. 8 No. 1 Juni (2010): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Arising vibration of a rocket while flying may cause a damage at electronic equipments, so that the rocket needs to be tested on what extent does the electronic equipment can receive a vibration. Based on the experience during the roll-out of rocket, a GPS (Global of Positioning System) equipment was found out to experience some disturbance as the rocket suffered acceleration , so that it will be difficult to trace the existence of the rocket. To alleviate a vibrating damper systems, we design a GPS for the rocket of RX 320 – LAPAN which is capable to receive the vibration up to 15 g. The result of scheme by comparising two successive amplitudes of X1 / X2 = 1 / 02, spring of stiffness k = 12000 N/m and mass GPS m = 0,3 kg with an acceleration of 15 g, gives the damping coefficient c = 24 N/m/second and resonance amplitude X = 9.2 mm
Co-Authors Artana, I Nyoman Digdoyo, Aji Ediwan, Ediwan Fauzhia Rahmasari Kurniawati, Nani Putra, Gunawan Ronald Ronald Setiohadi, Bagas Yuniaty, Erma