Impact-induced nonlinear damped vibration of fabric membrane structure: Theory, analysis, experiment and parametric study

Liu, Changjiang; Deng, Xiaowei; Liu, Jian; Zheng, Zhao

doi:10.1016/j.compositesb.2018.09.078

Cited by 22 publications

(12 citation statements)

References 39 publications

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“…The high magnitude of the shocks may also exceed not only the product's fragility but also the design range of any protective packaging system. [52][53][54][55] Shocks are also likely to provoke different damage mechanisms from random vibrations; the high magnitude may cause plastic deformation, fracture or compression failure (e.g., bruising)…”

Section: Vehicle-borne Shocks (Shock-on-random)mentioning

confidence: 99%

The case for reviewing laboratory‐based road transport simulations for packaging optimisation

et al. 2021

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Today, there exist a number of standards designed to assist packaging engineers with implementing suitable laboratory testing regimes for road transport. However, these standards generally focus on translational vibrations and do not include other motions that may affect survival rates during transport (e.g., pitch and roll). The standards also do not account for the significant variations in vibration (root mean square [rms]) levels that are clearly evident during transport. Further, the analysis and interpretation of vibration frequency spectra typically ignore the possible presence of harmonics or shocks. Most standards also advocate some form of time compression to reduce testing duration by artificially amplifying the simulated vibrations. Each of these individual approaches combines to render the simulated vibrations currently in use unrepresentative of what occurs during transport, thereby making it difficult to optimise packaging systems. This article focuses on road transport shocks and vibrations and highlights the shortcomings of proposing and making changes to test methods based on limited data obtained from specific transport scenarios. It argues that only once all the evidence, taking into account a broader set of scenarios from multiple studies, has been collected and the correct scientific analysis applied, should changes to test protocols be proposed and implemented. The paper includes specific recommendations for further evidence collection and analysis for each of the main issues associated with road transport vibrations, namely, spectral shape, rms levels and test duration, nonvibratory events such as shocks and multiaxis vibrations.

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Section: Vehicle-borne Shocks (Shock-on-random)mentioning

confidence: 99%

The case for reviewing laboratory‐based road transport simulations for packaging optimisation

et al. 2021

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“…The process of hailstone impacting on membrane surface is essentially energy conversion (Zheng et al, 2013). Because the membrane structure cannot bear bending moment, it can only resist load through deformation (Liu et al, 2019a). According to Figures 13 and 14, we can draw some conclusions:…”

Section: Numerical Simulationmentioning

confidence: 99%

“…However, membrane structure is a flexible structure with light weight, large span, and small stiffness, which is very sensitive to external loads, such as wind, rain, and hailstone (Hincz and Gamboa-Marrufo, 2016). Thus, membrane structure is prone to large vibration under impact loading, which goes against to the structural stability and even lead to structural failures (Liu et al, 2019a; Zhang et al, 2019; Zheng et al, 2019). The analysis of many engineering accidents shows the relaxation of membrane surface caused by lateral load (e.g.…”

Section: Introductionmentioning

confidence: 99%

Hailstone-induced dynamic responses of pretensioned umbrella membrane structure

Liu

Wang

Deng

et al. 2020

Advances in Structural Engineering

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The membrane structure is a flexible structure, which is easy to vibrate or even relax under dynamic load. Engineering accident analysis shows that the relaxation of membrane structure is more likely to lead to structural failure. In this article, the impact load problem is combined with the flexible structure to analyze the impact of hailstone impact load on the dynamic response of membrane structure. First, the umbrella membrane stretching device was designed and manufactured, and the hailstone impact test was carried out on the umbrella membrane structure with polyvinyl chloride membrane material. Dynamic response data, tension relaxation of side cables and vibration deformation of umbrella membrane structures impacted by hailstones with different sizes and different characteristic points were obtained. In the numerical analysis, the form-finding analysis of umbrella membrane structure is carried out by finite element method, and the transient impact analysis is conducted in LS-DYNA. Finally, the reliability of the research results is verified by comparing the numerical and experimental results. The general laws and conclusions are drawn and the disaster-causing mechanism of membrane structure impacted by hailstone is revealed. On the whole, although the probability of hailstone destroying the membrane material directly is very small, it will relax the membrane structure and affect the safety of membrane structure. The conclusions of this article provide a theoretical basis for the design and maintenance of membrane structures.

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“…Moreover, the homotopy analysis method based on the continuously changing topological theory, is often used in analysis of strong nonlinear systems [13]. Liu et al studied the nonlinear damped vibration of a fabric membrane under impact loading through the KBM perturbation method [14]. Keleshteri and Jelovica applied the harmonic balance method along with the direct iterative approach to the research of the free vibration response of functionally graded porous (FGP) cylindrical panels [15].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamics of Adaptive Gun Head Jet System of Fire-Fighting Monitor

2020

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The working medium of the adaptive gun head jet system of fire-fighting monitor is generally water containing a little bit of air. During the operation, the pressure pulsation of the fluid will cause the fluctuation of the equivalent stiffness of the gas-liquid mixed fluid, so that the motion of the fluid in the jet system has obvious nonlinear characteristics. In this paper, the nonlinear dynamic model of the jet system is established. The analytical expressions of the nonlinear vibration response of the jet system are derived via the multi-scale method. The main resonance and combined resonance of the jet system are determined. The results show that the external excitation frequency is the dominant frequency of the main resonance response of the jet system, and the combined frequency between the natural frequency of each order and the equivalent stiffness fluctuation frequency of the fluid unit has a small effect on the main resonance, and the maximum amplitude is 0.2592mm; the dominant frequency of the combined resonance response of the jet system is the combined frequency between the natural frequency of each order and the equivalent stiffness fluctuation frequency of the fluid unit, the system amplitude in combined resonance is smaller than that in the main resonance, and the maximum amplitude is 0.002532mm; the main resonance and the combined resonance will adversely affect the dynamic characteristics of the jet system. This research can provide a theoretical basis for the dynamic optimization of the adaptive gun head jet system of the fire-fighting monitor. INDEX TERMS Fire-fighting monitor, adaptive gun head, jet system, nonlinear vibration, dynamics.

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Impact-induced nonlinear damped vibration of fabric membrane structure: Theory, analysis, experiment and parametric study

Cited by 22 publications

References 39 publications

The case for reviewing laboratory‐based road transport simulations for packaging optimisation

The case for reviewing laboratory‐based road transport simulations for packaging optimisation

Hailstone-induced dynamic responses of pretensioned umbrella membrane structure

Nonlinear Dynamics of Adaptive Gun Head Jet System of Fire-Fighting Monitor

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