Osnove Prometnog Inženjerstva 2. Predavanje 28. 02. 2011.

Osnove Prometnog Inženjerstva 2. Predavanje 28. 02. 2011.

OSNOVE PROMETNOG INENJERSTVA 4. PREDAVANJE 07. 03. 2011 doc. dr. sc. Ljupko imunovi, dipl. ing. Fakultet prometnih znanosti, Zagreb Zavod za gradski promet PROMETNI TOK SADRAJ 1. ODNOSI MEU PARAMETRIMA (VELIINAMA) PROMETNOG TOKA 3. ZADACI ODNOSI KOJI VLADAJU MEU OSNOVNIM PARAMETRIMA PROMETNOG TOKA a) Tok motornih vozila b) Pjeaki tok

ODNOS BRZINA-GUSTOA V - brzina (km/h) vf brzina slobodnog toka vs v f vf kj k kj Jam Density k gustoa (voz/km) ODNOS BRZINA-GUSTOA (REALAN PRIKAZ)

brzina (km/h) vf gustoa (voz/km) ODNOS BRZINA-GUSTOA PREMA RAZNIM AUTORIMA v G r e e n s h ie ld s v ffs v = v ffs ( 1 - k / k j ) v v v ffs

k k v 2 - re im s k i lin e a rn i k j v 3 - r e im s k i li n e a r n i v ff s k j

G re e n b e rg ffs v = v c ln (k j/k ) vc k v v k 1 k 2 k U n d e rw o o d

ff s v = v ffs k j e - k /k j v E d ie v ffs v = v k c

ff s e - k /k k j j v = v c ln (k j /k ) k v v k k c

v 50 z v o n o lik a k riv u lja v = v ffs e - 0 . 5 ( k / k j ) k j 2 k c k j p r im je r s n im lje n ih p o d a ta k a 40

ffs 30 20 10 k k j 0 20 40 60 80 100 120 k

ODNOS BRZINA-GUSTOA GREENSHIELDOV MODEL (1934) q v k pj m min pj m s fundamentalna jednadba brzina vf brzina slobodnog toka vf /2 - kritina brzina (vc) kj /2- kritina gustoa (kc) kj - gustoa zaguenja gustoa formula za brzinu

formula za gustou: protok: ODNOS TOK - GUSTOA vf protok vf q v f k k j q t an v k q tg v q 2 k

k k gustoa q k v Fundamentalna jednadba prometnog toka TOK - GUSTOA Tok (voz/h) vf vc 2

k q v f k k j kapacitet, qmax Nestabilan tok Stabilan tok kc Kritina gustoa kj Jam Density Gustoa (voz/km) protok voz/h

ODNOS PROTOK-GUSTOA (REALAN PRIKAZ) gustoa voz/km ODNOS BRZINA - TOK vf vs u f v s q kj 2 V Vf 1/kc=hs Stabilan tok Vc nestabilan tok Q Qmax

max tok vf brzina slobodnog toka Brzina (km/h) BRZINA vs. TOK 2 v q k j v v f Slobodan tok um

zaguenje capacitet, qmak Tok (voz/h) c 1 c Stabilan tok Nestabilan tok c c Fundamentalni dijagram ovisnosti osnovnih parametara

prometnog toka u idealiziranim uvjetima ZAPAMTITI! (dr. sc. Bonjak, dr. sc. Badanjak: Osnove prometnog inenjerstva) = q = protok kopt= kc= kritina gustoa vs.opt= vc= kritina brzina kmax= kj = gustoa zaguenja vs.max= vf = slobodna brzina FUNDAMENTALNI DIJAGRAM (OBLIK TROKUTA) 3D PRIKAZ ODNOSA v, q i o brzina Normalan tok Forsirani tok zaguenje zau

ze e tok o pr PRISJETI SE! qmax - najvei protok = propusna mo ceste vf - slobodna brzina - brzina pri uvjetima slobodnoga toka vc - kritina brzina - brzina pri kojoj je protok najvei (q = qm) kj - gustoa zaguenja - gustoa pri kojoj su sva vozila stala (v = 0) kc - kritina gustoa - gustoa pri kojoj je protok najvei (q = qmax). PRAKTIAN PRIMJER - primjena nauenog! Pretpostavke: Lv = 6,1 m/voz

gs=2,23 m/voz hs = 8,33 m/voz Gustoa Protok (ako se pretpostavi da je u uvjetima najveeg protoka) Kritina gustoa kc kj 2 u toki C Kritina brzina vc=qc/kc u toki C

kc = 60 voz./km vc = 2400/60 = 40 km/h HVALA NA STRPLJENJU

Recently Viewed Presentations

  • Financial Aid Money Matters Financial Aid Office Mandate

    Financial Aid Money Matters Financial Aid Office Mandate

    be available to full-time students completing an international student abroad program as part of their degree requirement at the University of New Brunswick (Fredericton Campus) The award will be contingent on the students' registration and completion of the student abroad...
  • Education Reform Act 1988

    Education Reform Act 1988

    Education Reform Act 1988 The most important piece of education legislation since 1944 There are 6 main features A National Curriculum National Tests at 7, 11 and 14 Local Management of school budgets (LMS) Opting Out (Grant Maintained schools) City...
  • ASHOKA: The Great

    ASHOKA: The Great

    PPT on ASHOKA: The Great Presented by Prof. Ghatage P. K. Indian Emperor of Maurya Dynasty 269 BC to 232 BC Index Introduction Extent of Empire The Kalinga War Conversion to Buddhism Propagation of Buddhism Achievements Conclusion Introduction Chandragupta Maurya...
  • Microarray Data Analysis - National Sun Yat-sen University

    Microarray Data Analysis - National Sun Yat-sen University

    Microarray Data Analysis Stuart M. Brown NYU School of Medicine What is a Microarray A simple concept: Dot Blot + Northern Reverse the hybridization - put the probes on the filter and label the bulk RNA Make probes for lots...
  • PowerPoint 演示文稿 - Illinois

    PowerPoint 演示文稿 - Illinois

    each task (e.g., Renzo Piano is a famous architect. Find out. the name of the building that is Piano's most famous work) paired with a link comprising one or more query words that. would launch a search when clicked (e.g.,...
  • Ping, traceroute, etc.

    Ping, traceroute, etc.

    Simply pinging a remote host (a computer that is on one's internet but not on one's network) usually has an all or nothing outcome and as such can provide somewhat limited information A sequence of pinging can provide more information...
  • Lesson 10: Transformer Performance and Operation

    Lesson 10: Transformer Performance and Operation

    Convert impedance values into per unit or percent values based on transformer rating or other given values . Perform calculations using the per unit system. Convert per unit/percent values into circuit values. Compute transformer circuit parameters from test values.
  • Gaming. Sub-acute patients. RIC AND LINDY DRG Workshop

    Gaming. Sub-acute patients. RIC AND LINDY DRG Workshop

    Rehabilitation Client Code 2. Admit Motor Functional Independence Measure (FIM) score 3. Admit Cognitive FIM score 4. Patient Age Rehabilitation Patient Groups - Ontario 2008 -1 of 2 (M = motor FIM score; C=cognitive FIM scores) 1. Stroke 1100. ......