1-Amaliy mashg’ulot. Turli marshrutlarda ishlovchi transport vositalari ishini hisoblash Ishdan maqsad

1.2. Ikki tomonlama yukli qatnovchi mayatnikli marshrut ish hisobi.

Qaytishda yukli probеgli moyatnikli yo`nalish(1.2 rasm)dagi yuk tashuvchi transport vositalari ishini hisoblashda quydagi birlamchi ko‘rsatkichlarni olamiz.

1.2 -rasm. Orqaga yuk bilan qatnaydigan mayatnikli marshrut.

Yukli qatnov ℓеg= 10 km, nulinchi qatnovlar ℓ_n1=ℓ_n2=4 km,

Transport vositasining ishda bo‘lish vaqti T_n= 16 soat,
A nuqta dan B nuqtqgacha tashiluvchi yuklar hajmi Q_АB= 20000t,
B nuqtadan А nuqtagacha tashiluvchi yuklar hajmi Q_BА= 20000t,
Ikkala tomonga ham tashiluvchi yuklar 1sinifga mansub,yaniy γst= 1,0 teng.
Tashish muddati 20 kun.Ishlovchi avtomobil GАZ-53A (q_n= 4_t) harakat tezligi 25 km/ soat, har bir yukli qatnovda ortish-tushirishda turish vaqti t_o-t= 0,6 soat.
Hisoblash tartibi

1.Marshrut ichki yo‘ldan foydalanish koeffitsenti βm=1,ekanligini nazarda tutib, avtomobilning marshrutda ishlash vaqtini aniqlaymiz :

T_m = T_n – t_о = T_n – (ℓ_n1+ℓ_n2)/ Vt = 16 – ( 4+4)/ 25 =15,68 soat.

2. Avtomobilning bir kundagi yukli qatnovlarini hisoblaymiz:

Z_gе = T_m* β*V_t / ℓ_еg + β_е*V_t* t_o-t = 15,68 * 1,0*25 / 10 + 1,0* 25* 0,6 = 15,68 ~ 16 (qat)

Qatnovlarni 16 yaxlitlab marshrutdagi vaqtni qayta hisoblaymiz:
T_m1 = Z_gе1(ℓ_еg+ β_m * V_t* t_o-t)/ β_m * V_t = 16 (10 + 1,0*25* 0,6)/ 1,0* 25= 16 soat.
Ish vaqti esa
T_n1= T_m1+ t_о= 16+ 0,32 = 16,32 soat.

3.Avtomobilning bir kunlik ish unimi : tonnada

Q_kun = q_n* γ_st* Z_gе = 4*1*16 = 64tonna

Tonna km da

R_kun =qn * γst* ℓеg* Zgе =4*1*16 *10= 640 tkm

Toshish rejasini bajarish uchun zarur avtomobillar soni

А_e = Q_АB + Q_BА / D_ik* Q _kun = 20000+20000 / 20 * 64 =31 tа.

4.Avtomobilning kunlik qatnov masofasi:

L_kun = ℓ_еg* Z_gе +(ℓ_n1+ ℓ_n2)= 16*10 + (4+4) = 168 km

5.Kun davomida avtomobilning nyo‘ldan foydalanish koeffitsenti:

β_е = ℓ_еg* Z_gе/ L_kun =10*16/168 = 0,95