Instability load analysis of a telescopic  boom for an all-terrain crane

Xu, Jinshuai; Zhuo, Yingpeng; Zai-kang, QI; Wang, Gang; Zhao, Tao; Wang, Tianyu

doi:10.5194/ms-13-991-2022

Cited by 2 publications

(1 citation statement)

References 46 publications

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“…Несмотря на ряд научных работ, посвященных изучению нагруженности телескопической стрелы грузоподъемных кранов [2][3][4][6][7][8][9][10][11][12][13], крайне мало внимания уделено исследованию нагружения телескопического стрелового оборудования от давления опорных элементов в процессе выдвижения (втягивания) секций.…”

Section: нагружение телескопической стрелы от местных нагрузок в проц...unclassified

Loads of the Telescopic Boom From Local Loads During Telescoping

POTAKHOV

2023

MMMM

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One of the main factors affecting the performance of telescopic booms is the loss of local stability of the shelves and section walls. The loss of local stability of the sections occurs due to the development of plastic deformations in some of the most loaded sections of the telescopic booms or as a result of the loss of stable equilibrium of the sections even at the stage of elastic deformation. In this case, the maximum stresses of the telescopic boom are formed in the sections of the location of the supporting elements, where the summation of deformations from external loads and forces acting from the side of the supporting elements (local loads) occurs. The aim of the work is to study the loading of telescopic boom from the action of local forces in the process of telescoping. Analysis of the loading of telescopic boom in the process of extending (retracting) the sections is carried out using the example of the boom equipment of a railway crane Sokol 80.01M. Numerical modeling is used to study the local loading of telescopic boom of a crane during telescoping. Three telescoping modes are selected: consecutive extension (retraction) of sections without load; synchronous extension (retraction) of sections without load; consecutive extension (retraction) of sections with a load. The results of the virtual experiment for each mode are the time dependences of the local forces generated at the locations of the sliding bearings, and the time dependences of the vertical loads on the pins of the telescoping hydraulic cylinders. A comparison was made of the greatest loadings of the boom and telescoping hydraulic cylinders formed with three options for extending (retracting) sections. Based on the obtained dependencies of local loads, the maximum stresses of the telescopic boom were calculated during each telescoping mode.

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Section: нагружение телескопической стрелы от местных нагрузок в проц...unclassified

Loads of the Telescopic Boom From Local Loads During Telescoping

POTAKHOV

2023

MMMM

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A One-Dimensional Dynamic Model for a Thin-Walled U-Shaped Boom Segment Considering Cross-Section Deformation

Zhu,

Zhang,

Wang

2024

Symmetry

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This article presents a one-dimensional dynamic model for a thin-walled U-shaped telescopic crane boom segment, considering cross-section deformation, to address complex and inefficient dynamic modeling issues. The symmetric U-shaped cross-section provides a uniform distribution of mass and stress, enhancing the beam’s stability and bending stiffness. This symmetry allows for a simplified analysis in dynamic modeling, reducing the number of variables that need to be considered. The cross-section deformation is captured by basis functions satisfying displacement continuity conditions, which lays the foundation for constructing the initial model formulation based on the Hamilton principle. The variation forms of the cross-section are obtained by the decoupling eigenvalue problem, and then the principal component analysis is carried out to identify major cross-section deformation. The identified cross-section deformation features are hierarchically structured and have real physical significance. Finally, the initial one-dimensional higher-order dynamics model is improved by using the identified deformation mode. Numerical examples are presented in order to validate the three-dimensional dynamic properties and transient dynamic behavior of the U-shaped boom segment. The proposed model demonstrated high accuracy compared to ANSYS models, with relative errors below 2%. In addition, the method can be widely applied to a thin-walled U-shaped boom segment with a slenderness ratio of more than four.

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Instability load analysis of a telescopic boom for an all-terrain crane

Cited by 2 publications

References 46 publications

Loads of the Telescopic Boom From Local Loads During Telescoping

Loads of the Telescopic Boom From Local Loads During Telescoping

A One-Dimensional Dynamic Model for a Thin-Walled U-Shaped Boom Segment Considering Cross-Section Deformation

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