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...Matec web of conferences https doi org matecconf ijcaet isampe adomian decomposition method for solving initial value problems in vibration models sudi mungkasi and i made wicaksana ekaputra department mathematics faculty science technology sanata dharma university mrican tromol pos yogyakarta indonesia mechanical engineering abstract a number have second order ordinary differential equations as their mathematical practice we may large scale problem with degrees freedom which must be solved accurately therefore treating the model governing correctly is required to get an accurate solution this work use solve forms however involving external source not lead if treated paper propose strategy treat when implement computational results show that our indeed effective obtain solutions considered note exact are often available so they need approximated using some methods such introduction occurs daily life sounds acoustics machines etc vibrations can either or without terms term assumed force...