MODELING AND VIBRATION RESPONSE ANALYSIS OF PELLET MACHINE GRINDER AND GEARBOX

Pellet machine is a machine used to print feed in the form of pellets. In this machine, if it operates, it can experience excessive vibration and the force acting on the machine is close to its natural frequency and can cause damage, so it needs to be reduced. In this study, the objective of this research is to model and simulate vibrations in the gearbox and grinder to determine the results of the displacement and acceleration vibration responses on the pellet machine. In this study, an electric motor is used as a source of rotation and an input clutch as a connection between the shaft of the electric motor and the gearbox as a transmission to reduce the speed of the electric motor, where the rotation produced by the electric motor contains vibrations, the output coupling is the connecting shaft between the gearbox shaft and the shaft grinder and miller as a tool used to print pellets. From the existing physical form, mathematical equations and simulation blocks are constructed. In this research, it is found that the vibration response generated from the gearbox and grinder can be modeled with the x and z axes as the center of the system. The higher the vibration response, the higher the given frequency, the greater the amplitude and rms of the displacement and acceleration responses in each part, namely the motor, clutch in, gearbox gearbox, coupling out, and grinder will be greater. The result of displacement vibration response yields an rms of 1.956. The worm gear in the gearbox produces a displacement vibration of 1.0585 m and an acceleration of 6.8485 m/s2. The mill produces a displacement vibration of 1.0891 m and an acceleration of 5.1095 m/s2.Pellet machine is a machine used to print feed in the form of pellets. In this machine, if it operates, it can experience excessive vibration and the force acting on the machine is close to its natural frequency and can cause damage, so it needs to be reduced. In this study, the objective of this research is to model and simulate vibrations in the gearbox and grinder to determine the results of the displacement and acceleration vibration responses on the pellet machine. In this study, an electric motor is used as a source of rotation and an input clutch as a connection between the shaft of the electric motor and the gearbox as a transmission to reduce the speed of the electric motor, where the rotation produced by the electric motor contains vibrations, the output coupling is the connecting shaft between the gearbox shaft and the shaft grinder and miller as a tool used to print pellets. From the existing physical form, mathematical equations and simulation blocks are constructed. In this research, it is found that the vibration response generated from the gearbox and grinder can be modeled with the x and z axes as the center of the system. The higher the vibration response, the higher the given frequency, the greater the amplitude and rms of the displacement and acceleration responses in each part, namely the motor, clutch in, gearbox gearbox, coupling out, and grinder will be greater. The result of displacement vibration response yields an rms of 1.956. The worm gear in the gearbox produces a displacement vibration of 1.0585 m and an acceleration of 6.8485 m/s2. The mill produces a displacement vibration of 1.0891 m and an acceleration of 5.1095 m /s2

PENDEKATAN KARAKTERISTIK RESPON GETARAN SISTEM 2 DOF SETELAH PENAMBAHAN INDEPENDENT DUAL TRANSLASIONAL DYNAMIC VIBRATION ABSORBER

Dual Translational dynamic vibration absorber (dDVA) is two DVA masses that can move in the translational direction and given into the system to reduce system-translation translational vibrations. The research about using dual translational DVA to reduce vibration with the simulation method has been done, but a study about using the experimental method in that study to do validation from the simulation results that never been done. In this research we conducted a study related to the characteristics of 2 DOF system vibration response after the addition of dual translational DVA with an experimental approach and compared the results with simulation results data. Comparison between experiment date and simulation date is done in order to determine the level of error between the two methods. Simulation data is obtained by simulating the existing equations of motion from the study of literature, while the experimental data is obtained from testing with a DVA test with several changes in the frequency of excitation. From this research shows that the vibration characteristics of the experimental results are the same as the characteristics of the vibration of the simulation results, with an average significance level of 91.5%. The error that occurs between the results of the simulation and experiment is caused by the disappearance of some vibrations from the main system to the environment around the system, so that resulting differences result between simulation and experiment

PENGARUH PENAMBAHAN MASA dDVA (DUAL DYNAMIC VIBRATION ABSORBER) UNTUK MEREDAM GETARAN TRANSLASI DAN ROTASI PADA BEAM

Translation DVA merupakan jenis masa tambahan yang digunakan untuk mereduksi getaran arah translasi. Selama ini tidak banyak penelitian terkait penggunaan translasional DVA untuk mereduksi getaran rotasi sekaligus translasi. Dalam penelitian ini dilakukan penelitian terkait penggunaan double translasional DVA (dDVA) untuk mereduksi getaran translasi sekaligus rotasi dari beam. Penelitian dilakukan dengan melakukan studi literatur terlebih dahulu, kemudian memodelkan sistem yang diperoleh kedalam persamaan matematika dan dilakukan simulasi untuk mengetahui karakteristik getaran yang timbul. Dalam simulasi salah satu dari masa DVA diletakkan pada pusat masa sistem utama, sedangkan satu masa DVA yang lainnya diberikan perubahan antara pusat masa hingga ujung dari sistem. Dari hasil penelitian ditunjukan bahwa pengurangan getaran translasi yang maksimal adalah sebesar 95,51% dan terjadi saat masa absorber diletakkan pada pusat masa dari sistem, sedangkan pengurangan getaran rotasi maskimal adalah sebesar 56,62 % dan diperoleh saat sistem diberikan masa dengan rasio lengan 1 dan nol. Dari hasil penelitian juga ditunjukan bahwa penggunaan dDVA paling efektif justru terjadi saat sistem diberikan masa absorber pada pusat masa dan bagian ujung dari sistem, sehingga diperoleh pengurangan getaran translasi sebesar 92,29% dan rotasi sebesar 56,62%

Study eksperimental laju keausan pada 2 buah high density polyethylene (HDPE) dengan variasi normal load pada kondisi reciprocating sebagai sendi rahang (temporomandibular joint) manusia

Pada banyak kasus, SDVA (single dynamic vibration absorber) hanya digunakan untuk mengurangi getaran translasi saja. Sementara pada kasus yang kompleks sistem juga mengalami getaran rotasi. Beberapa peneliti telah melakukan penelitian terkait penggunaan SDVA untuk mengurangi getaran translasi. Tetapi penelitian terkait penggunaan SDVA untuk mereduksi getaran translasi dan rotasi belum banyak dilakukan. Pada penelitian dilakukan study pengaruh perubahan posisi masa SDVA dari titik berat sistem utama terhadap karakteristik getaran translasi dan rotasi sistem utama. Penelitian dimulai dengan membangun prototype sistem getaran 2 DOF, translasi–rotasi dengan penambahan SDVA. Prototype dimodelkan secara matematis dan dilakukan simulasi untuk mengetahui perubahan karakteristik getaran yang terjadi. Dalam simulasi diberikan perubahan pada jarak lengan momen masa SDVA terhadap pusat masa sistem utama, frekuensi eksitasi dan besar masa absorber yang digunakan untuk mereduksi getaran. Untuk mengetahui kebenaran dari simulasi maka dilakukan eksperimen. Dari penelitian ditunjukan bahwa pemberian SDVA mampu meredam getaran pada resonansi mode pertama (rfr=1) adalah sebesar 87,51% yang terjadi saat sistem diberikan masa absorber sebesar ms/10 dengan rl = 4,42. Penurunan getaran maksimum pada resonansi mode kedua (rf=1) adalah sebesar 98,8% yang terjadi saat sistem diberikan masa absorber sebesar ms/10 dengan rl = 0. Sedangkan berdasarkan optimasi yang dilakukan ditunjukan bahwa penurunan getaran translasi dan rotasi yang paling optimum adalah sebesar 80,5% yang terjadi saat sistem diberikan masa absorber sebesar ms/10 dengan rl = 3,5. =================================================================================================== In many cases, SDVA (single dynamic vibration absorber) is only used to reduce translational vibration. Meanwhile, in more complex cases, the system also experiences rotational vibration. Some researchers have done some researches about how to reduce translational vibration by using SDVA. But the researches about SDVA usage to reduce translational vibration and rotation have not been widely used. This researches performed the study of the influence in SDVA mass position changes from the main system emphasis toward the rotational and translational vibration characteristics of the main system. The researches started from building the prototype of 2 DOF vibrational system, translation-rotation, and adding SDVA. The prototype is modeled mathematically, and performs the simulation to find out any changes in the vibration. Changes is given to the simulation in the distance between SDVA mass toward the center of grafity system, excitational frequency, and the volume of absorber mass. To discoover the simulation truth, an experiment is needed. The research shows that SDVA can reduce first mode vibration resonance (rfr= 1) for 87,5 %, which occurs when we given the primary system is given mass absorber for ms/10 with r1 = 4,42. The maximum degreement in the second mode resonance (rf= 1) is equal to 98,8% which occur when the primary system is given absorber mass for ms/10 with rl = 0. Whereas based optimizations performed indicated that the decrease in translational and rotational vibration primary system most optimum amounted to 80.5%, which occurs when the given mass absorber by ms / 10 with rl = 3.5

Pendekatan Eksperimen Karakteristik Respon Getaran Sistem Two Degree of Freedom dengan Penambahan Independent Dual Dynamic Vibration Absorber

Vibration is one of the problems that must be reduced in a vehicle. There are many ways to reduce vibration in vehicles, one of them is by adding Dynamic vibration absorber (DVA). While Dual Dynamic vibration absorber (dDVA) is a DVA period that is able to move in the translational direction given to the system to reduce translation vibration and when there is resonance. Translation DVA is an additional type of time used to reduce the vibration of the translation direction. So far there is not much research related to the use of translational DVA to reduce rotational vibrations as well as translation. In this study, a study was conducted related to the use of independent double translational DVA (dDVA) to reduce translation vibrations as well as rotation of the beam. The research was conducted by modeling the system obtained into mathematical equations and simulations were carried out to determine the characteristics of vibrations that arise. In the simulation, one of the DVA periods is placed at the center of the main system period, while the other DVA period is given a change between the center period and the end of the system. The results of the study show that the maximum reduction in translational vibration is 95.51% and occurs when the absorber is placed at the center of the system, while the maximum rotation vibration reduction is 56.62% and is obtained when the system is given with an arm ratio of 1 and zero

PENDEKATAN KARAKTERISTIK RESPON GETARAN SISTEM 2 DOF SETELAH PENAMBAHAN INDEPENDENT DUAL TRANSLASIONAL DYNAMIC VIBRATION ABSORBER

Dual Translational dynamic vibration absorber (dDVA) is two DVA masses that can move in the translational direction and given into the system to reduce system-translation translational vibrations. The research about using dual translational DVA to reduce vibration with the simulation method has been done, but a study about using the experimental method in that study to do validation from the simulation results that never been done. In this research we conducted a study related to the characteristics of 2 DOF system vibration response after the addition of dual translational DVA with an experimental approach and compared the results with simulation results data. Comparison between experiment date and simulation date is done in order to determine the level of error between the two methods. Simulation data is obtained by simulating the existing equations of motion from the study of literature, while the experimental data is obtained from testing with a DVA test with several changes in the frequency of excitation. From this research shows that the vibration characteristics of the experimental results are the same as the characteristics of the vibration of the simulation results, with an average significance level of 91.5%. The error that occurs between the results of the simulation and experiment is caused by the disappearance of some vibrations from the main system to the environment around the system, so that resulting differences result between simulation and experiment.</jats:p