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    Wyświetlanie 1-5 z 5
    Tytuł:
    The problem of evaluating the expiration of the service life of the supporting structure of secondhand cranes
    Autorzy:
    Rosochacki, Włodzimierz
    Powiązania:
    https://bibliotekanauki.pl/articles/224039.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    crane
    supporting structure
    service life
    container
    dźwig
    konstrukcja wsporcza
    ocena zużycia
    Opis:
    The right to safety of purchased goods is one of the most important consumer rights. Therefore, an accurate analysis of safety of machinery and equipment purchased on the secondary market is an extremely important issue. One of its elements should be the assessment of the degree of service live usage. In the case of cranes, the subject of such an assessment covers both the supporting structure of the device and its mechanisms and installations. Information on evaluation of the service life expiration of the secondhand cranes may be necessary and support the decision-making process associated with the purchase of the device. The paper deals with the problem of evaluating the expiration of the service life of the supporting structure of cranes coming from the secondhand market. The result of such evaluation makes it possible to determine whether the production capacity of a device has been exhausted. This forms the basis for the decisions on any possible further operation of the crane. The work presents an approach based on the provisions of standard ISO 12482: 2014. This document is the basis for service life evaluation for cranes. The approach presented in it makes the way of analysis dependent on the method used to collect operational data. In this paper the evaluation of service life expiration was prepared on the example of a ship to shore gantry cranes. These devices are characterized by particularly large dimensions and weight. Damage of their supporting structure can lead to the significant losses. Some of these devices change the location during operation. Therefore, it is important to know the current level of their service life usage. A case, in which the operational history of a device is not known, was considered. In the paper the special attention was paid to the methodology of estimating the load distribution coefficient. In order to describe the hypothetical load spectrum, triangular distribution was proposed. The results of the calculations for the structure of port cranes are presented and discussed.
    Źródło:
    Archives of Transport; 2019, 49, 1; 37-45
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Revising Hong Kong’s midstream operation: A discussion on the Port Feeder Barge concept
    Autorzy:
    Lau, Yui-yip
    Malchow, Ulrich
    Powiązania:
    https://bibliotekanauki.pl/articles/2141017.pdf
    Data publikacji:
    2019
    Wydawca:
    Fundacja Centrum Badań Socjologicznych
    Tematy:
    midstream operation
    floating crane
    floating terminal
    intermodal harbour vessel
    intra-port haulage
    container barge
    LNG
    Opis:
    Midstream operation (MSO) has played an important role in Hong Kong's port business since the 1960s. MSO has been seriously neglected in maritime transport research in the past. In the course of filling this significant research gap, we aim to address how a new type of harbor vessel – Port Feeder Barge (PFB) can strengthen the sustainability and attractiveness of MSO in Hong Kong and of the port in general. By introducing such type of vessel MSO becomes much safer and faster, much more efficient with less manpower being needed, provides higher flexibility and causes less environmental impact compared to the traditional Hong Kong midstream barges (HK barges). Due to its special layout as a deck carrier the PFB is also very well suited to be optionally fuelled with Liquefied Natural Gas (LNG) which would result into an ultimate "green" harbor vessel. Semi-structured, in-depth interviews with a number of maritime professionals involved in MSO activities in Hong Kong have revealed how PFBs could be employed in MSO, the potential regulatory issues and operating challenges and the critical success factors for further PFB deployment in the Asia-Pacific region. The study provides insights how the PFB could provide notable advantages for a sustainable recovery of MSO in Hong Kong.
    Źródło:
    Journal of Sustainable Development of Transport and Logistics; 2019, 4, 2; 5-21
    2520-2979
    Pojawia się w:
    Journal of Sustainable Development of Transport and Logistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pojęcie budowli – problemy definicyjne. Uwagi de lege lata na tle wyników kontroli NIK
    Notion of “Structure” in the Building Industry – De Lege Lata Considerations in the Light of Selected Findings of NIK Audits
    Autorzy:
    Jakubowski, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/417190.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Najwyższa Izba Kontroli
    Tematy:
    construction law
    notion of structure
    base station
    container crane
    Opis:
    There are more and more buildings whose complexity, with regard to technology and construction, makes it difficult to qualify them to the category of a structure on the basis of the criteria set forth in Article 3, item 3 of the Construction Law. In the years 2012-2015, the Supreme Audit Office conducted several audits in which the key issue was to decide whether the audit subject is related to a structure. In his article, the author presents examples related to selected buildings whose qualification as a structure raised interpretation doubts in the light of Article 3, item 3 of the Construction Law. This led to the latitude and the lack of unified stance of architecture and construction administration bodies, and construction supervision bodies in the application of the law, and consequently – to significant doubts in evaluation of the audited activities.
    Źródło:
    Kontrola Państwowa; 2017, 62, 2 (373); 127-144
    0452-5027
    Pojawia się w:
    Kontrola Państwowa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of a Container Terminal and it’s Reflect on Port Economy
    Autorzy:
    Elentably, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/116308.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    container terminal
    port economy
    simulation of a container terminal
    discrete event simulation (DES)
    port simulation software (PORTSIM)
    handling equipment
    mobile harbour crane (MHC)
    gantry crane (GC)
    Opis:
    The combination between the design and project of container terminals and the reflect on port’s economy may be carried out through two main approaches: optimization or simulation. Although the approaches based on optimization models allow a more elegant and compact formulation of the problem, simulation models are mainly based on discrete event simulation (DES) models and help to achieve several aims: then measure this impact on port economy before and after implemented this updating overcome mathematical limitations of optimization approaches, support and make computer-generated strategies/policies more understandable, and support decision makers in daily decision processes through a “what if” approach. Several applications of DES models have been proposed and simulation results confirm that such an approach is quite effective at simulating container terminal operations. Most of the contributions in the literature develop object oriented simulation models and pursue a macroscopic approach which gathers elementary handling activities (e.g. using cranes, reach stackers, shuttles) into a few macro-activities (e.g. unloading vessels: crane-dock-reach stacker-shuttle-yard), simulate the movement of an “aggregation” of containers and therefore do not take into account the effects of container types (e.g. 20’ vs 40’, full vs empty), the incidence of different handling activities that may seem similar but show different time duration and variability/dispersion (e.g. crane unloading a container to dock or to a shuttle) and the differences within the same handling activity (e.g. stacking/loading/unloading time with respect to the tier number). Such contributions primarily focus on modeling architecture, on software implementation issues and on simulating design/real scenarios. Activity duration is often assumed to be deterministic, and those few authors that estimate specific stochastic handling equipment models do not clearly state how they were calibrated, what data were used and what the parameter Values are. Finally, no one investigates the effects of different modeling hypotheses on the simulation of container terminal performances. The focus of this paper is on the effects that different hypotheses on handling equipment models calibration may have on the simulation (discrete event) of container terminal performances. Such effects could not be negligible and should be investigated with respect to different planning horizons, such as strategic or tactical. The aim is to propose to analysts, modelers and practitioners a sort of a guideline useful to point out the strengths or weaknesses of different approaches. Drawing on the model architecture which will be affected on port economics.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 2; 331-337
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anti-seismic device design for container crane and its elastic-plastic time history analysis
    Autorzy:
    Dong, D.
    Li, J.
    Teng, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/963365.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    quayside container crane
    time history analysis
    energy design method
    anti-seismic device
    Opis:
    Quayside container crane is a kind of large dimension steel structure, which is the major equipment used for lifting container at modern ports. With the aim to ensure the safety and reliability of the crane under seismic loads, an anti-seismic device is designed. To validate the efficiency and reliability of the anti-seismic device, elastic-plastic time history analysis under rare seismic intensity is carried out. And the results of elastic-plastic time history analysis when the crane installed anti-seismic device and uninstalled the device are compared.
    Źródło:
    Polish Maritime Research; 2015, S 1; 30-34
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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