Bucket wheel excavators: Dynamic response as a criterion for validation of the total number of buckets

Gnjatović, Nebojša B.; Bošnjak, Srđan; Milenović, Ivan L.J.; Stefanović, Aleksandar

doi:10.1016/j.engstruct.2020.111313

Cited by 5 publications

(8 citation statements)

References 29 publications

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“…, 64), created for the BWE SchRs 1600 (Figure 2). The procedure for the formation and validation of the model, which has already been successfully used to analyze the impacts of the number of buckets [56], the counterweight mass [57], as well as incrustation and chute blockage [58] on the dynamic response of the structure, is described in detail in [59].…”

Section: Methodsmentioning

confidence: 99%

“…A study on the impact of the bucket-wheel frequency of revolution, i.e., the frequency of revolution of the bucket-wheel drive electromotor (FREM), on the dynamic response of the referent points of the structure, determined in accordance with the standard [52], was conducted using a spatial reduced dynamic model of the slewing superstructure with 64 degrees of freedom (generalized coordinates qs, s = 1, 2, …, 64), created for the BWE SchRs 1600 (Figure 2). The procedure for the formation and validation of the model, which has already been successfully used to analyze the impacts of the number of buckets [56], the counterweight mass [57], as well as incrustation and chute blockage [58] on the dynamic response of the structure, is described in detail in [59]. was formed by applying the Lagrange's second-order equations, A system of differential equations of motion (vibrations) of the model under the action of the excitation caused by the resistance to excavation,…”

Section: Methodsmentioning

confidence: 99%

“…As is already known, in BWEs, the fundamental frequency of excitation caused by the forces resisting excavation depends on two crucial parameters of the excavating device, i.e., it is proportional to the number of buckets and the bucket-wheel frequency of revolution. The impact of the number of buckets on the dynamic behavior of the BWE slewing superstructure, under the nominal frequency of the bucket-wheel revolution, is analyzed in detail in [56]. Below is presented a study on the impact of the bucket-wheel frequency of revolution of the dynamic behavior of the BWE slewing superstructure as a basis for the implementation of the proposed idea, which, simultaneously and fully, both methodologically and operatively, solves the problem of the selection of the key parameters of the BWE excavating device and their impact on the dynamic response of its slewing superstructure.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Dynamic Response as a Basis for the Efficient Protection of Large Structure Health Using Controllable Frequency-Controlled Drives

2022

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Continuous earthmoving machines, such as bucket-wheel excavators (BWEs), are the largest mobile terrestrial machines exposed to the working loads of a periodic character. This paper aims to launch a new idea regarding the preservation of the load-carrying structures of these machines by the means of implementing a controllable frequency-controlled drive of the excavating device. Successful implementation of this idea requires a detailed analysis of the dynamic response of the load-carrying structure in order to determine the domains of frequency of revolutions of the bucket-wheel-drive electromotor (FREM) where the dynamic response of the structure is favorable. The main goal of the presented research was the development of a unique three-step method for the identification of the FREM ranges, where the vibroactivity of the load-carrying structure is within the allowed boundaries. A methodologically original study of the dynamic response was conducted on a unique dynamic model of the BWE slewing superstructure that allows for continuous variation of the FREM, i.e., of the frequency of excitation caused by the forces resisting the excavation. Validation of the spatial reduced dynamic model of the slewing superstructure and the corresponding mathematical model, as well as the overall approach to the determination of the dynamic response, were performed by the means of vibrodiagnostics under the real exploitation conditions. Application of the developed method has yielded: (1) the resonant-free FREM domains; (2) the FREM domains, where the structure is not exposed to the excessive dynamic impacts; and (3) the frequency ratio ranges defining the resonant areas. Additionally, the results of the research have pointed out that the resonant-free state represents a necessary but insufficient condition for the proper dynamic behavior of the BWE slewing superstructure.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of the Dynamic Response as a Basis for the Efficient Protection of Large Structure Health Using Controllable Frequency-Controlled Drives

2022

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“…These are mainly the distances of the individual measuring instruments (GNSS, inclinometers, inclement speed sensors) in relation to each other and to some mechanical "nodes" of the excavator structure [9]. Subsequently, an algorithm [8] was developed that incorporated the results of the measurements of the individual measuring and gauging instruments and allowed calculations of the spatial position of the wheel centre in any general position of the excavator [10]. Somewhat more complex is the modelling of the shape of the material to be placed on the spoil heap by tracked stackers using the throw parabola [4].…”

Section: Basic Components Of the Systemmentioning

confidence: 99%

System monitorowania położenia koparek i wielonaczyniowych węgla brunatnego i bezpieczeństwa ich pracy

SLÁDEK,

DEJL,

KAPICA

et al. 2024

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Celem systemu śledzenia w czasie rzeczywistym pozycji koparek i ładowarek górniczych jest usprawnienie zarządzania i kontroliwydobycia węgla brunatnego w kopalniach odkrywkowych oraz poprawa bezpieczeństwa pracy. System oblicza położenie koparkikołowej wykorzystując dane z urządzeń GNSS zainstalowanych na gigantycznych maszynach górniczych, inklinometrów orazinercyjnych jednostek pomiarowych znajdujących się na każdej maszynie górniczej. Dane przesyłane są z maszyn i przechowywanew bazach danych na serwerach. Wizualizacja ruchu koparki kołowej w czasie rzeczywistym realizowana jest w oprogramowaniu firmyKVASoftware s.r.o., które umożliwia pracę z cyfrowym modelem terenu, geologią złoża i nadkładu, w tym obiektami zagrażającymibezpieczeństwu pracy. W artykule opisano procedurę przygotowania danych i konfiguracji całego systemu na różnych poziomachKVASoftvare s.r.o. produkty oprogramowania. Szczegółowo opisano także jego zastosowanie ze względu na bezpieczeństwo pracyw ciężkiej eksploatacji górniczej, szczególnie na terenach objętych eksploatacją podziemną lub na terenach niebezpiecznych ze względuna występowanie deformacji tektonicznych w nadkładzie i w pokładzie.

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“…Such activities may lead to modernization; an example is the bucket wheel [12]. The methods of extending the service of technical objects include efficiency improvements [24], reduction in the dynamic loads' impact [25,26], and work safety improvements [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

The Assessment of the Technical Condition of Complex Fatigued Load-Carrying Structures

Misiewicz

Więckowski

2021

Applied Sciences

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This article presents a research approach that enables the assessment of the technical condition of complex technical objects. The main emphasis is placed on the load-carrying structures of these objects. The procedure applying experimental research techniques and computer computations using the finite element method is described. The combination of the two techniques assesses the technical condition of the structure. The described approach is presented using the example of two objects.

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Bucket wheel excavators: Dynamic response as a criterion for validation of the total number of buckets

Cited by 5 publications

References 29 publications

Analysis of the Dynamic Response as a Basis for the Efficient Protection of Large Structure Health Using Controllable Frequency-Controlled Drives

Analysis of the Dynamic Response as a Basis for the Efficient Protection of Large Structure Health Using Controllable Frequency-Controlled Drives

System monitorowania położenia koparek i wielonaczyniowych węgla brunatnego i bezpieczeństwa ich pracy

The Assessment of the Technical Condition of Complex Fatigued Load-Carrying Structures

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