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    Wyświetlanie 1-8 z 8
    Tytuł:
    Effects of timber loads on gross vehicle weight
    Autorzy:
    Trzcinski, G.
    Sieniawski, W.
    Moskalik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/38354.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    timber load
    forest road
    loading
    gross vehicle weight
    transportation
    timber haulage
    Opis:
    Forest roads are characterized by low traffic, but heavy timber haulage trucks have a significant influence on road conditions and usually exceed the limit of 80–100 kN per axle. The excessive weight of the trucks degrades the road surface and the forest environment. This article presents the results of a study of timber transport loads from their places of acquirement (forest districts) to the recipient (a large sawmill). The analysis includes the parameters of the timber transport vehicles and focuses especially on the gross vehicle weight (GVW), the total weight of empty truck and trailer during transport, and the weight of their loads. Scania, Iveco, Man, and Mercedes trucks with trailers and semitrailers designed for large-size pine timber transport were analyzed. ANOVA results revealed that all 80 analyzed vehicles exceeded the permitted GVW in the range from 2.28 to 19.94 Mg, transporting from 20.1 to 37.5 m3 of timber. The coefficient of determination between the amount of hauled timber and the GVW equaled 62.7%. Research conducted previously concluded that forest roads with ground and gravel surfaces are not suitable for overloads of 120–150 kN per axle. Therefore, it is necessary to find a logistical solution that will allow the load volume to be maintained at an acceptable level without destroying the forest road surface.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2013, 55, 4
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of locomotive operating characteristics on wheels in contact with the rails
    Vlijanie ehkspluatacionnykh kharakteristik lokomotiva na parametry kontakta kolesa s pelsom
    Autorzy:
    Kravchenko, C.
    Gorbunov, Nikolai
    Sosnovenko, S.
    Prosvirova, O.
    Bragin, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/953096.pdf
    Data publikacji:
    2012
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    coupling weight
    load device
    operational factor
    slick wheel
    contact
    locomotive
    braking quality
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of pavement moisture content on the load-bearing capacity of forest road
    Autorzy:
    Grajewski, S. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/100971.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    light weight deflectometer
    LWD
    static load-bearing test
    VSS
    very low-volume roads
    Opis:
    The aim of the study was to analyse the interaction between pavement moisture content and load-bearing capacity of an unpaved forest road. The selected experimental road sector was divided into three sections (A, B and C), which were flooded with three different amounts of water 10 mm (section A), 20 mm (section B) and 30 mm (section C), compared with the intense rainfall. Three series of tests were conducted at each section: prior to flooding (1st day of measurements), during the first 24 hours after flooding (2nd day) and during the next 24 hours after flooding (3rd day of measurements). Moisture content of structural layers of the road (surface course, base course and subbase course) were determined and the measurements using a light weight deflectometer (Evd, s/v) and a static plate (E1 , E2 , Io ) were conducted. Recorded averaged results clearly indicate a negative effect of an increase in pavement layers moisture content (e.g. resulting from heavy rainfall) on the forest road carrying capacity and on compaction parameters of its layers. On the third day of the measurements a decrease in the analysed modulus, on average between 16% (E2 ) and 25% (Evd) was observed, but a decrease in compaction by 16% (s/v) and 4% (Io).
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2016, IV/2; 1451-1462
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MHAC—An Assessment Tool for Analysing Manual Material Handling Tasks
    Autorzy:
    Batish, A.
    Singh, T. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/90084.pdf
    Data publikacji:
    2008
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    material handling
    manual carrying tasks
    working posture
    load/weight
    Opis:
    This paper describes an assessment tool for analysing material handling tasks and its application for material handling tasks prevalent in engine bearing industry. After a close observation of material handling tasks spread over many days, a list of tasks and parameters/variables affecting those tasks was made. Ergonomic conditions present in these tasks and their deficiencies were then identified and on the basis of the relationships between the tasks and their affinities, categories were developed. Using the data of those categories and various conditions and parameters, an assessment tool called MHAC (material handling assessment chart) was developed.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2008, 14, 2; 223-235
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected issues rules of weight control aircraft
    Autorzy:
    Stańczyk, P.
    Stelmach, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246703.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    balancing plane
    centre of gravity of the airplane
    weight of the load
    Opis:
    In the era of dynamic development of the sciences, uninterrupted security is a priority for each of the sectors of transport. Flight safety depends on many factors that determine the quality and number of operations performed and functioning air transport system whereas the means of transport which is the aircraft. By factors must be understood as any action case, condition or situation where the existence or non-existence increases the probability of failure of the flight. The technical and organizational complexity of air transport system, a multitude of aviation personnel, the operation of the aircraft in various weather conditions are sources of various factors affecting flight safety. This article presents one of the very important things that must be done before every flight - the balance of the aircraft, which is a way of determining the centre of gravity plane COG, moreover, in the article also describes the weight of the passenger. Exemplified filled sheet loading and balance for Boeing B737-400 with the necessary tables, indexes, aimed at normalizing the data. Presented article is an introduction to the issue of control of the weight of the aircraft, taking into account the mass of passengers and their impact on the respective position of the centre of gravity of the aircraft.
    Źródło:
    Journal of KONES; 2016, 23, 3; 495-503
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Urządzenie do pomiaru masy poruszającego się obiektu w aspekcie istniejących rozwiązań
    The device to measure the weight of the object while moving, in the aspect of existing solutions
    Autorzy:
    Jagiełowicz-Ryznar, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/314858.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    infrastruktura drogowa
    nacisk na oś
    pomiar całkowitej masy pojazdu
    road infrastructure
    axle load
    measurement of vehicle weight
    Opis:
    W artykule przedstawiono opatentowane urządzenie do określania masy poruszającego się obiektu w znanym środowisku w oparciu o drgania generowane przez tą masę, zwłaszcza pojazdów poruszających się po drogach bez wpływu na ich bezpieczeństwo. Przedstawiono zalety ww. urządzenia w aspekcie innych istniejących już rozwiązań do pomiaru masy. Przeprowadzono test analityczny określania masy pojazdu na podstawie charakterystyki siły nacisku w funkcji czasu w czasie ruchu pojazdu na platformie pomiarowej.
    The patented device to measure the weight of objects in moving is presented. The object moves in known environment, and the base is the wibrations that are generated by this weight, especially of vehicles moving on the road without affecting their safety. There are presented the advantages of foregoing devices, in the aspect of other existing solutions for mass measurement. An analytical tests were carried out to determine the weight of the vehicle, basing on the force pressure in the time function in the motion of the vehicle being on the measuring platform.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 12; 910-914, CD
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wywóz drewna wielkowymiarowego a obciążenie dróg leśnych
    Impact of the timber haulage on loading of the forest roads
    Autorzy:
    Trzciński, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/238729.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    obciążenie
    droga leśna
    masa całkowita
    samochód
    oś pojazdu
    transport drewna
    loading
    forest road
    gross vehicle weight
    load per axle
    timber transport
    Opis:
    Wywóz drewna jest realizowany 5- i 6-osiowymi samochodami wysokotonażowymi, których masa całkowita nie powinna przekraczać 40 t. W pracy przedstawiono wyniki analiz zestawów wywozowych, stosowanych w transporcie drewna wielkowymiarowego: parametrów zewnętrznych, masy całkowitej zestawu, obciążenia poszczególnych osi, jednostkowych ładunków drewna. Badaniom poddano 80 samochodów różnych marek w zestawach 3+2 osie lub 3+3 osie. Masa całkowita zestawów wynosiła od 42 do 60 t, a średnie obciążenie pojedynczej osi - od 80 do 120 kN.
    Wood transport is carried out with the use of five-axle and six-axle high tonnage vehicles whose total weight should not exceed 40 tons. The objective of this study was to recognize the real loads on vehicle's axles during transportation of timber. Paper presented an analysis of the parameters for vehicles used to wood transportation, such as technical characteristics, gross vehicle weight, load on particular axles, single timber loads. 80 vehicles of different types and marks, in sets of 3+2 or 3+3 axles, were investigated. The total weight of vehicles ranged from 42 to 60 t, and the average load per single axle from 80 to 120 kN.
    Źródło:
    Problemy Inżynierii Rolniczej; 2011, R. 19, nr 1, 1; 185-193
    1231-0093
    Pojawia się w:
    Problemy Inżynierii Rolniczej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność ładunków i masy całkowitej zestawów wywozowych przy transporcie drewna
    Variability of loads and gross vehicle weight in timber transportation
    Autorzy:
    Trzciński, G.
    Moskalik, T.
    Wojtan, R.
    Tymendorf, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/989068.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    surowce drzewne
    drewno
    transport
    masa ladunku
    zestawy transportowe
    masa calkowita
    zmiennosc
    volume of timber load
    gvw
    weight of timber
    weight of empty vehicle
    Opis:
    Timber hauling from the forest, either directly to the consumer or to the place of transshipment for a rail transport, is carried out by vehicles adapted to the transport of long or short logs and medium−sized wood. In Poland, regulations restrict the total weight of a vehicle traveling on roads, which consists of the weight of the empty vehicle and the weight of the load. When transporting the wood, the variability of the species, assortments, and wood moisture content does not allow for the unambiguous determination of the weight of transported timber, which often contributes to the excessive gross vehicle weight (GVW). In the conducted study, we analyzed Scots pine wood shipments (mainly short logs of length of 3.7−5.0 m) in different seasons of the year: in January (652 shipments), in March/April (1586), in July/August (1324), and in October/November (1914). GVW was calculated, based on the weight of an empty set and a weight of the load. The weight of the load was determined in two ways. In the first one it was calculated as a difference between loaded and unloaded truck. Measurements were carried out on the stationary scales. In the other method the volume of transported wood was taken from a delivery note and multiplied by the conversion rate for Scots pine, which equals 0.74 Mg/m³. The difference between both calculation methods reached 17%. It was found that in 2016 timber loads varied greatly, ranging from 41.3 to 66.9 Mg. The average GVW for the year 2016 was 50.64 Mg and it was on the similar level as in 2009 – 51.12 Mg on average, ranging from 40.06 to 64.20 Mg.
    Źródło:
    Sylwan; 2017, 161, 12; 1026-1034
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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