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SK Mengajar Genap 2019/2019 Prodi Sistem Informasai
No full textSK kinerja mengajar dosen prodi Sistem Informasi Semester Genap 2019/202
Laporan Penulisan di Media Massa Tentang Pelatihan E-Commerce
Get PDFPenulisan yang berisi tentang kegiatan pelatihan E-Commerce ke masyarakat UMKM di linkungan Unan
KEPUTUSAN MENTERI PENDIDIKAN DAN KEBUDAYAAN TENTANG INDIKATOR KINERJA UTAMA PERGURUAN TINGGI NEGERI DAN LEMBAGA LAYANAN PENDIDIKAN TINGG
Get PDFKEPUTUSAN MENTERI PENDIDIKAN DAN KEBUDAYAAN
TENTANG INDIKATOR KINERJA UTAMA PERGURUAN TINGGI
NEGERI DAN LEMBAGA LAYANAN PENDIDIKAN TING
Energy analysis and experimental evaluation of momentum exchange impact damper with prestraining spring mechanism
Get PDFThe aim of this research is to evaluate the performance of impact-induced vibration control
using momentum exchange impact damper with pre-straining spring mechanism (PSMEID)
based on the energy analysis and verifying the effectiveness of the proposed method experimentally
using
a
simple
three-body
collision
model.
It
is
shown
from
the
simulation
study
that
the
fraction of energy absorbed by the primary mass was small if the excitation frequency
differs from the primary mass natural frequency. In the case of excitation frequency is lower
than the primary mass natural frequency, most of the impact energy is transferred to the
damper mass. For excitation frequencies higher than the primary mass natural frequency, a
large amount of impact energy is reflected after the collision. The energy absorption ratio is
small if the damper mass ratio(M
d
/M
p
) approaches 0.2 and the ratio between pin force (f
)and
the reference friction force (f
) closest to 1. The optimum condition of the pre-straining spring
stiffness increases when the impact damper mass ratio is increased. The experiment was
conducted to validate the simulation results. The experimental data has shown that the
fref
minimum acceleration response is obtained using the pre-straining spring deflection ratio
(xps/xpsref= 0.18)