Design and simulation of innovative foam-filled Lattice Composite Bumper System for bridge protection in ship collisions

Zhu, Lu; Liu, Weiqing; Fang, Hai; Chen, Jiye; Zhuang, Yong; Han, Juan

doi:10.1016/j.compositesb.2018.08.067

Cited by 54 publications

(18 citation statements)

References 32 publications

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“…The collision cases between ships and bridges (Chen et al, 2019; Kameshwar and Padgett, 2018; Moe et al, 2017a, 2017b; Wang and Morgenthal, 2017, 2018a) are studied in many articles in recent years, but the studies on the collision cases between ships and anti-collision structures are not common. An innovative foam-filled lattice composite bumper system (Zhu et al, 2018) shows the properties of good energy absorbing and highly designable and performs an obvious advantage in the peak impact force and duration. Sha et al (2019a) present a numerical investigation of ship collision response for a floating pontoon.…”

Section: Introductionmentioning

confidence: 99%

Initial response mechanism and local contact stiffness analysis of the floating two-stage buffer collision-prevention system under ship colliding

Lü

Chen

Gao

et al. 2021

Advances in Structural Engineering

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A floating two-stage buffer collision-prevention system (FTBCPS) has been proposed to reduce the impact loads on the bridge pier in this paper. The anti-collision process can be mainly divided into two stages. First, reduce the ship velocity and change the ship initial moving direction with the stretching and fracture of the polyester ropes. Second, consume the ship kinetic energy with the huge damage and deformation of the FTBCPS and the ship. The main feature of the FTBCPS lies in the first stage and most of the ship kinetic energy can be dissipated before the ship directly impacts on the bridge pier. The contact stiffness value between the ship and the FTBCPS can be a significant factor in the first stage and the calculation method of it is the focus of this paper. The contact force, the internal force and the general equation of motion have been given in the first part. The structure model of the ship and the FTBCPS are then established in the ANSYS Workbench. After that, 38 typical load cases of the ship impacting on the FTBCPS are conducted in LS-DYNA. The reduction processes of the ship kinetic energy and the ship velocity in different load cases have been investigated. It can be summarized that the impact angle and the ship initial velocity are the main factors in the energy and velocity dissipation process. Moreover, the local impact force-depth curves have also been studied and the impact angle is found to be the only significant factor on the ship impact process. Next, the impact force-depth curves with different impact angles are fitted and the contact stiffness values are accordingly calculated. Finally, the impact depth range, the validity of the local simulation results and the consistency of the fitted stiffness value are verified respectively, demonstrating that the fitted stiffness values are applicable in the global analysis.

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Section: Introductionmentioning

confidence: 99%

Initial response mechanism and local contact stiffness analysis of the floating two-stage buffer collision-prevention system under ship colliding

Lü

Chen

Gao

et al. 2021

Advances in Structural Engineering

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“…The critical temperature change is defined as 3 10 cr cr TT      and the dimensionless natural frequency is defined as…”

Section: Solution Proceduresmentioning

confidence: 99%

“…Compared to traditional lightweight structures, the hybrid sandwich structures exhibit good mechanical performances as well as enhanced multi-functionality with respect to load bearing capacity, energy absorption and thermal protection [2]. Thus, they have demonstrated a wide range of applications in shipbuilding, train manufacturing and construction industry [3][4][5][6]. Among various core topologies of the sandwich structures (e.g., pin-reinforced [7], truss [8], honeycomb [9]), corrugated cores have received major research attention because of their easy fabrication and cost-efficient maintenance [10].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Stability of Hybrid Corrugated Sandwich Plates under Fluid-Structure-Thermal Coupling for Novel Thermal Protection Systems

Zhuang

Yang

2020

Applied Sciences

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Hybrid corrugated sandwich (HCS) plates have become a promising candidate for novel thermal protection systems (TPS) due to their multi-functionality of load bearing and thermal protection. For hypersonic vehicles, the novel TPS that performs some structural functions is a potential method of saving weight, which is significant in reducing expensive design/manufacture cost. Considering the novel TPS exposed to severe thermal and aerodynamic environments, the mechanical stability of the HCS plates under fluid-structure-thermal coupling is crucial for preliminary design of the TPS. In this paper, an innovative layerwise finite element model of the HCS plates is presented, and coupled fluid-structure-thermal analysis is performed with a parameter study. The proposed method is validated to be accurate and efficient against commercial software simulation. Results have shown that the mechanical instability of the HCS plates can be induced by fluid-structure coupling and further accelerated by thermal effect. The influences of geometric parameters on thermal buckling and dynamic stability present opposite tendencies, indicating a tradeoff is required for the TPS design. The present analytical model and numerical results provide design guidance in the practical application of the novel TPS.

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“…In aeronautics and aerospace engineering the use of these structures dates back to 1960s when they gained popularity due to the possibility of reducing weight without sacrificing strength and, in general, of finding satisfactory balance among different required functions, such as load-bearing, heat insulation, and thermal protection [1]. Combining different materials can also be used to enhance a single specific property, such as the capability of absorbing energy during ship [2] or train [3] collisions. In transportation, studies are constantly carried out to engineer new parts, such as roofs and floors of trains [4]; hoods, bumpers, engine compartments and body structures of cars [5]; and hulls, decks or bulkheads of ships [6], where noise, vibration and harshness (NVH) issues are particularly relevant.…”

Section: Introductionmentioning

confidence: 99%

Vibro-Acoustic Characterization of a Composite Structure Featuring an Innovative Phenolic Foam Core

2019

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Composite panels are being increasingly used in many applications because they can combine several interesting properties, such as high load-bearing capacity, low weight, and excellent thermal insulation. Different core materials can be used for composite sandwich panels, like polystyrene, mineral wool, polyurethane, glass wool, or rigid phenolic foam, which is considered the rigid plastic foam with the best fire-proof properties. During the research and development phase, the use of simulation tools is often required for the improvement of the mechanical behavior of the material. The aim of the paper is to characterize some vibro-acoustic parameters of a sandwich material with phenolic open-cell foam core. The sound transmission loss of the structure is calculated based on its flexural behavior, represented through a frequency-dependent “apparent” bending stiffness which is estimated by natural frequency vibration tests on beam specimens. The comparison between sound transmission loss predictions and measurements in sound transmission suites according to ISO 10140-2 is presented and discussed. Finally, the early-stage prediction potentiality of the mathematical model is investigated when only nominal information is available on the constituent layers, showing that particular attention should be paid to the modifications introduced by the manufacturing process.

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Design and simulation of innovative foam-filled Lattice Composite Bumper System for bridge protection in ship collisions

Cited by 54 publications

References 32 publications

Initial response mechanism and local contact stiffness analysis of the floating two-stage buffer collision-prevention system under ship colliding

Initial response mechanism and local contact stiffness analysis of the floating two-stage buffer collision-prevention system under ship colliding

Mechanical Stability of Hybrid Corrugated Sandwich Plates under Fluid-Structure-Thermal Coupling for Novel Thermal Protection Systems

Vibro-Acoustic Characterization of a Composite Structure Featuring an Innovative Phenolic Foam Core

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