Free Essay

Machine Theory

In: Computers and Technology

Submitted By amirli
Words 432
Pages 2
04.04.2013

MAKİNA TEORİSİ
ÖDEV 2 Prof. Dr. Özgür TURHAN, Araş. Gör. Y. Müh. Hasan KÖRÜK
Teslim Tarihi: 18.04.2013

SORU 1 (Makinanın statik dengesi)

r12

4 2 3 r11 r3 r4

s4 r2 5

s3

s5 r5 y

M
6 1

q

s6 m6 x

P

Şekilde bir eksantrik pres gösterilmiştir. a) (Kağıt üzerinde) Bu makinanın kısıt denklemlerini elde edip, bilgisayarda kinematik çözümleme gerçekleştirmek için gereken hazırlığı yapınız, b) (Kağıt üzerinde) Öbür uzuvların ağırlıklarını göz ardı edip 6 no.lu uzvunkini hesaba katarak, P presleme kuvvetini karşılamak için 2 no.lu uzva uygulanması gereken M momentinin hesaplanması problemini q’ye bağlı olarak formüle ediniz. c) (Bilgisayarda, kinematik çözümleme programı yardımıyla) Yukarıdaki hazırlığınızdan yararlanarak, M momentinin, presleme işleminin gerçekleştiği 202,5o≤q≤225o aralığında q ile değişimini grafik olarak elde ediniz. (Programın bütünü değil fakat kısıt denklemlerinin ve statik probleminin tanımlandığı, sayısal verilerin girildiği ve kuvvet grafiğinin elde edildiği kesimleri ödevde verilmeli.) r11=100 cm, r12=60 cm, r2=25 cm, r3=80 m, r4=100 cm, r5=100 cm, P=20.000 N, m6=250 kg

SORU 2 (Makina hareketinin benzetimi/simülasyonu)

4 c

s3

2 M e 3 s4

F

1 Uzuv kütleleri m2=m, m3=2m ve m4=3m olarak bilinen ve 2 no.lu uzvu e eksantrikliğine sahip r yarıçaplı bir dairesel diskten ibaret olan şekildeki makina, 3-4 kayar mafsalıyla 1-4 kayar yatağına etkiyen c katsayılı viskoz sürtünme kuvvetleriyle bir elektrik motorunun 2 no.lu uzva uyguladığı M(  ) önüne alarak; a) (Kağıt üzerinde) Makinanın Eksergian hareket denklemini elde ediniz, b) (Bilgisayarda) m=15 kg, r=80 cm, e=10 cm, Mkalk=150 Nm, s=50 rad/s GRUP I: c=500 Ns/m, GRUP II: c=1000 Ns/m GRUP III: c=1500 Ns/m, GRUP IV: c=2000 Ns/m verildiğine göre, hareket denkleminin bilgisayar yardımıyla sayısal çözümünü gerçekleştirerek makinanın =0, =0 başlangıç şartlarına sahip hareketinin ilk 5 saniyesinin benzetimini elde edip, sonucu grafikler halinde veriniz, c) e ve c parametrelerindeki değişikliklerin ve mil kütlesel eylemsizlik momentine bir I eki yapılmasının makinanın dinamiği üzerindeki etkilerini benzetimler yardımıyla irdeleyip bulgularınızı yorumlayınız. GRUPLAR GRUP I : Numarası 010070140-030080047 arası olan öğrenciler GRUP II : Numarası 030080070-030090008 arası olan öğrenciler GRUP III: Numarası 030090021-030090135 arası olan öğrenciler GRUP IV: Numarası 030090138-030120704 arası olan öğrenciler

M( )

M kalk

1

2 2 s

momentinin etkisi altındadır. Uzuv ağırlıklarını da göz

UYARILAR
BELİRTİLEN TARİHTEKİ DERS SAATİNDE TESLİM EDİLMEYEN ÖDEVLER KABUL EDİLMEZ. ÖZENSİZ VE BAŞTAN SAVMA HAZIRLANMIŞ ÖDEVLER NOTLANDIRILMAZ. TAMAMEN YA DA KISMEN BİRBİRİNDEN KOPYALANMIŞ ÖDEVLER NOTLANDIRILMAZ. SORU 2’DE KENDİ GRUBUNA AİT VERİLERİ KULLANMAYAN ÖDEVLERİN BU SORUSU NOTLANDIRILMAZ.

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