Refactor conversion of traction unit's air resistance
Max Kannenberg
parent
b0026e55c2
commit
191d19d3ef
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@ -303,12 +303,12 @@ function Train(file, type = :YAML)
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transportType = :freight # "freight" or "passenger" for resistance calculation
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v_limit = 140 # in m/s (default 504 km/h)
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a_braking = 0 # in m/s^2, todo: implement as function
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f_Rtd0 = 0 # coefficient for basic resistance due to the traction units driving axles (in ‰)
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f_Rtc0 = 0 # coefficient for basic resistance due to the traction units carring axles (in ‰)
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F_Rt2 = 3000 # coefficient for air resistance of the traction units (in N)
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f_Rw0 = 0 # coefficient for the consists basic resistance (in ‰)
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f_Rw1 = 0 # coefficient for the consists resistance to rolling (in ‰)
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f_Rw2 = 0 # coefficient fo the consistsr air resistance (in ‰)
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f_Rtd0 = 0 # coefficient for basic resistance due to the traction unit's driving axles (in ‰)
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f_Rtc0 = 0 # coefficient for basic resistance due to the traction unit's carring axles (in ‰)
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f_Rt2 = 0 # coefficient for air resistance of the traction unit (in ‰)
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f_Rw0 = 0 # coefficient for the consist's basic resistance (in ‰)
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f_Rw1 = 0 # coefficient for the consist's resistance to rolling (in ‰)
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f_Rw2 = 0 # coefficient for the consist's air resistance (in ‰)
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F_v_pairs = [] # [v in m/s, F_T in N]
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## load from file
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@ -520,6 +520,7 @@ function Train(file, type = :YAML)
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id = train["id"]
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haskey(train, "UUID") ? uuid = parse(UUID, train["UUID"] ) : nothing
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transportType == :freight ? a_braking = -0.225 : a_braking = -0.375 # set a default a_braking value depending on the train type
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#TODO: add source: Brünger, Dahlhaus, 2014 p. 74 (see formulary.jl)
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## set the variables for all vehicles
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for vehicle in vehicles
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@ -553,7 +554,7 @@ function Train(file, type = :YAML)
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haskey(loco, "a_braking") ? a_braking = loco["a_braking"] : nothing
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haskey(loco, "base_resistance") ? f_Rtd0 = loco["base_resistance"] : nothing
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haskey(loco, "rolling_resistance") ? f_Rtc0 = loco["rolling_resistance"] : nothing
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haskey(loco, "air_resistance") ? F_Rt2 = loco["air_resistance"] * g * m_loco : nothing
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haskey(loco, "air_resistance") ? f_Rt2 = loco["air_resistance"] : nothing
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haskey(loco, "mass_traction") ? m_td = loco["mass_traction"] * 1000 : m_td = m_t
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haskey(loco, "rotation_mass") ? ξ_loco = loco["rotation_mass"] : nothing
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m_tc = m_loco- m_td
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@ -607,7 +608,7 @@ function Train(file, type = :YAML)
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ξ_train, ξ_loco, ξ_cars,
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transportType, v_limit,
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a_braking,
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f_Rtd0, f_Rtc0, F_Rt2, f_Rw0, f_Rw1, f_Rw2,
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f_Rtd0, f_Rtc0, f_Rt2, f_Rw0, f_Rw1, f_Rw2,
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F_v_pairs
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)
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@ -674,7 +675,7 @@ function createCharacteristicSection(id::Integer, s_entry::Real, section::Dict,
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for POI in path.poi
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s_poi = POI[:station]
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if POI[:measure] == "rear"
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s_poi -= s_trainLength
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s_poi += s_trainLength
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end
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if s_entry < s_poi && s_poi < s_exit
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push!(pointsOfInterest, (s_poi, POI[:label]) )
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@ -55,15 +55,15 @@ function calcTractionUnitResistance(v::AbstractFloat, train::Train)
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# equation is based on [Wende:2003, page 151]
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f_Rtd0 = train.f_Rtd0 # coefficient for basic resistance due to the traction units driving axles (in ‰)
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f_Rtc0 = train.f_Rtc0 # coefficient for basic resistance due to the traction units carring axles (in ‰)
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F_Rt2 = train.F_Rt2 # coefficient for air resistance of the traction units (in N)
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f_Rt2 = train.f_Rt2 # coefficient for air resistance of the traction unit (in ‰)
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m_td = train.m_td # mass on the traction unit's driving axles (in kg)
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m_tc = train.m_tc # mass on the traction unit's carrying axles (in kg)
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F_R_tractionUnit = f_Rtd0/1000 * m_td * g + f_Rtc0/1000 * m_tc * g + F_Rt2 * ((v + Δv_air) /v00)^2 # vehicle resistance of the traction unit (in N) # /1000 because of the unit ‰
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# TODO: use calcForceFromCoefficient? F_R_tractionUnit = calcForceFromCoefficient(f_Rtd0, m_td) + calcForceFromCoefficient(f_Rtc0, m_tc) + F_Rt2 * ((v + Δv_air) /v00)^2 # vehicle resistance of the traction unit (in N)
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F_R_tractionUnit = f_Rtd0/1000 * m_td * g + f_Rtc0/1000 * m_tc * g + f_Rt2/1000 * (m_td+m_tc) * g * ((v + Δv_air) /v00)^2 # vehicle resistance of the traction unit (in N) # /1000 because of the unit ‰
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# TODO: use calcForceFromCoefficient? F_R_tractionUnit = calcForceFromCoefficient(f_Rtd0, m_td) + calcForceFromCoefficient(f_Rtc0, m_tc) + calcForceFromCoefficient(f_Rt2, m_td+m_tc) * ((v + Δv_air) /v00)^2 # vehicle resistance of the traction unit (in N)
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return F_R_tractionUnit
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#TODO: same variable name like in the rest of the tool? return R_traction
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#TODO: just one line? return train.f_Rtd0/1000*train.m_td*g+train.f_Rtc0/1000*train.m_tc*g+train.F_Rt2*((v+train.Δv_air)/v00)^2 # /1000 because of the unit ‰
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#TODO: same variable name like in the rest of TrainRuns? return R_traction
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end #function calcTractionUnitResistance
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"""
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@ -45,10 +45,10 @@ struct Train
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a_braking::Real # in m/s^2
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# coefficients for the vehicle resistance
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# for the traction unit (F_Rt=f_Rtd0*m_td*g+f_Rtc0*m_tc*g+F_Rt2*((v+Δv_air)/v00)^2)
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# for the traction unit (F_Rt=f_Rtd0*m_td*g+f_Rtc0*m_tc*g+f_Rt2*m_loco*g*((v+Δv_air)/v00)^2)
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f_Rtd0::Real # coefficient for basic resistance due to the traction units driving axles (in ‰)
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f_Rtc0::Real # coefficient for basic resistance due to the traction units carring axles (in ‰)
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F_Rt2::Real # coefficient for air resistance of the traction units (in N)
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f_Rt2::Real # coefficient for air resistance of the traction units (in ‰)
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# for the consist (set of wagons) (F_Rw=m_w*g*(f_Rw0+f_Rw1*v/v00+f_Rw2*((v+Δv_air)/v00)^2))
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f_Rw0::Real # coefficient for the consists basic resistance (in ‰)
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@ -37,7 +37,7 @@ vehicles:
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rotation_mass: 1.09 # source: "Railway Timetabling & Operations" by Hansen, et al., 2014, p. 71 for the traction unit
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base_resistance: 2.2 # source: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 151 for "4-achsige Diesellokomot." -> 2.2 ‰ to 3.5 ‰
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air_resistance: 0.01 # source: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 151 for "MittelfUhrerstand" -> 5000 N to 10000 N; modified for the used formula
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air_resistance: 10 # source: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 151 for "MittelfUhrerstand" -> 5000 N to 10000 N; modified for the used formula
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tractive_effort:
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- [0.0, 186940]
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@ -9,12 +9,12 @@ trains:
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vehicles:
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- name: Siemens Desiro Classic # source: https://de.wikipedia.org/wiki/Siemens_Desiro_Classic
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id: DB_BR_642
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id: DB_BR_642
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UUID: c915c80d-c63d-490b-879f-c481e4b62b55
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picture: https://commons.wikimedia.org/wiki/File:Liesel_28-11-10_642_055-8_im_Bahnhof_Scharfenstein.JPG
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power_type: diesel # source: https://de.wikipedia.org/wiki/Siemens_Desiro_Classic
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vehicle_type: multiple unit # source: https://de.wikipedia.org/wiki/Siemens_Desiro_Classic
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length: 41.7 # source: https://de.wikipedia.org/wiki/Siemens_Desiro_Classic
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mass: 68.0 # source: https://de.wikipedia.org/wiki/Siemens_Desiro_Classic
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load_limit: 20.0 # source: https://de.wikipedia.org/wiki/Siemens_Desiro_Classic
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@ -26,7 +26,7 @@ vehicles:
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rotation_mass: 1.08 # source: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 13 for "Zug, überschlägliche Berechnung"
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base_resistance: 3.0 # source: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 151 for "f_WL0" -> 2.5 ‰ to 3.5 ‰
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rolling_resistance: 1.4 # source: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 151 for "f_WW0" -> 1.2 ‰ to 1.6 ‰
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air_resistance: 0.0039 # source: the closest parameters are used: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 151 for "Fzg. vierachsig, abgerundeter Kopf" plus "Sektion bei Mehrteiligkeit" -> 2200 N + 400 N
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air_resistance: 3.9 # source: the closest parameters are used: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 151 for "Fzg. vierachsig, abgerundeter Kopf" plus "Sektion bei Mehrteiligkeit" -> 2200 N + 400 N
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# tractive effort as pairs of speed and tractive effort
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tractive_effort:
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@ -54,7 +54,7 @@ vehicles:
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rotation_mass: 1.09 # source: "Railway Timetabling & Operations" by Hansen, et al., 2014, p. 71 for the traction unit
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base_resistance: 2.5 # source: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 151 for "4-achsige Diesellokomot." -> 2.2 ‰ to 3.5 ‰
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air_resistance: 0.006 # source: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 151 for "4-achsig, eckige Kopfform" with "Stromabnehmer" -> 5000 N to 6000 N; modified for the used formula
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air_resistance: 6.0 # source: "Fahrdynamik des Schienenverkehrs" by Wende, 2003, p. 151 for "4-achsig, eckige Kopfform" with "Stromabnehmer" -> 5000 N to 6000 N; modified for the used formula
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tractive_effort:
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- [0.0, 300000]
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