An optimum design method for a new deployable mechanism in scissors bridge

Han, Jun; Zhu, Pengcheng; Li, Tao; Gao-jie, Chen; Zhang, Shuai; Yang, Xiao Qiang

doi:10.1177/0954406219869046

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…In civilian settings, they are often part of search and rescue units. The production and utilization of heavy mechanized bridges, especially since the 1960s, have been notable in countries such as the United States, India, Germany, Russia, the Czech Republic, China, Finland, Poland, and others [1][2][3][4][5][6][7][8]. The base vehicles for these devices can be wheeled or tracked.…”

Section: Introductionmentioning

confidence: 99%

Research on the dynamics of a heavy mechanized bridge in the deployment phase of the lifting frame

Thang,

Le,

Chu

2024

Eureka: PE

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This article presents a dynamic model of the TMM-3M heavy mechanized bridge during the frame lifting stage, which is driven by a hydraulic system, constituting the initial phase of the bridge erection process. The model is constructed as a multi-body dynamic system, taking into account the elastic deformation of the rear outriggers, front tires, and front suspension system. The research model integrates a mechanical system controlled by hydraulic cylinders, with pressure being considered as a variable reacting to external loads during the system's operation. Lagrangian equations of the second kind are utilized to establish a system of differential equations describing the oscillations of the system and form the basis for investigating the dynamics of the frame lifting process. The system of differential equations is solved numerically using MATLAB simulation software based on the Runge-Kutta algorithm. The study has revealed laws regarding the displacement and velocity of components within the system, evaluating the stability of the TMM-3M heavy mechanized bridge during operation. This research paves the way for a comprehensive understanding of the working process of the TMM-3M heavy mechanized bridge, aiming for practical improvements to minimize deployment or retrieval time, reduce the number of deployment team members, enhance the automation of the operation process to reduce the workload for operators

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Section: Introductionmentioning

confidence: 99%

Research on the dynamics of a heavy mechanized bridge in the deployment phase of the lifting frame

Thang,

Le,

Chu

2024

Eureka: PE

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Modern structures of military logistic bridges

Szelka

Wysoczański

2022

Open Engineering

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The growing paste of military operations, as well as the increased involvement of the Armed Forces in countering the ramifications of natural disasters, impacts the design solutions used for military bridging systems. The most vital optimization factor is the speed of deployment to which all the structural solutions are subject. Another determinant is a wide range of the parameters of the gap to be crossed using one bridging structure transported using typical means of transportation, including its width and the height of the banks. There is a worldwide tendency to fill the space between the treadways, making them more solid and thus much more usable for civilian vehicle traffic as well. That in turn makes them a provisional replacement for the damaged bridge infrastructure used by the population. This poses a number of challenges to be tackled by the state-of-the-art line-of-communication (LOC) bridges and both the close- and general support bridges, which seem to assume the tasks of the LOC bridges.

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Studying the influence of engine speed on the entire process of span-lowering of the heavy mechanized bridge

Le,

Tran,

Dao

et al. 2024

Eureka: PE

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The paper presents a dynamic model of the TMM-3M heavy mechanized bridge during the span lowering stage. The model is constructed as a multi-body mechanical system, taking into account the elastic deformation of the cable, rear outriggers, front tires, and front suspension system. It is a mechanical model driven by a cable mechanism. Lagrangian equations of the second kind have been applied to establish a system of differential equations describing the oscillations of the mechanical system and serve as the basis for investigating the dynamics of the span-lowering process. The system of differential equations is solved using numerical methods based on MATLAB simulation software. The study has revealed laws of the displacement, velocity, and acceleration of components within the mechanical system, especially those related to the bridge span depending on the choice of the drive speed of the engine during lowering by operator. The research results show that the lowering time increases from 52 seconds to 104 seconds when the engine speed decreases from 1800 rpm to 900 rpm. The tension force on the cable is surveyed to confirm the safety conditions during the span-lowering process. The study also provides recommendations for selecting appropriate engine speeds to minimize span-lowering time while ensuring the safety conditions of the TMM-3M bridge during the span-lowering process. This research is an important part of a comprehensive study on the working process of the heavy mechanized bridge TMM-3M to make practical improvements, aiming to reduce deployment time, decrease the number of deployment crew members, and increase the automation capability of the equipment

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An optimum design method for a new deployable mechanism in scissors bridge

Cited by 3 publications

References 22 publications

Research on the dynamics of a heavy mechanized bridge in the deployment phase of the lifting frame

Research on the dynamics of a heavy mechanized bridge in the deployment phase of the lifting frame

Modern structures of military logistic bridges

Studying the influence of engine speed on the entire process of span-lowering of the heavy mechanized bridge

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