Study on the thermal insulation performance of a new seabed sediment fidelity sampler based on ANSYS

Guo-ying, Liu; Liu, Guijie; Yuan, Weijie

doi:10.1007/s11802-009-0277-4

Cited by 8 publications

(9 citation statements)

References 8 publications

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“…Buckling of H-beams are simulated by ANSYS software [7], then compared to theoretical value, its rationality is validated. The comparion is shown in Table 1.…”

Section: Compare To Finite Element Analysismentioning

confidence: 99%

Buckling Analysis of Two-Span Continuous Beams with Lateral Elastic Brace under Uniform Load

Zhang

Sui

Zong

et al. 2010

AMR

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Both total potential energy and buckling equation of two-span continuous beam with lateral elastic brace under uniform load are deduced, based on energy variation method and the principle of minimum potential energy. Buckling of H-beams is simulated by ANSYS software, then compared to theoretical value, validated its rationality. High precision buckling moment formula is regressed using 1stOpt which is a famous mathematical optimization analysis software in China. The relationship between lateral brace stiffness and buckling moment is obtained. Results: with lateral brace stiffness increases, critical bending moment of beam increases within up-limit, e.g. when lateral brace stiffness increases to certain extent, buckling moment no longer increases.

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“…Buckling of H-beams are simulated by ANSYS software [7], then compared to theoretical value, its rationality is validated. The comparion is shown in Table 1.…”

Section: Compare To Finite Element Analysismentioning

confidence: 99%

Buckling Analysis of Two-Span Continuous Beams with Lateral Elastic Brace under Uniform Load

Zhang

Sui

Zong

et al. 2010

AMR

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“…In coastal areas, driven by rapid international trade development and economic globalization, construction of ports and widening of waterways has led to the rapid expansion of the dredging industry. Dredged soil, an available resource, is commonly used for ecological restoration and land reclamation [1]. Usually, dredged soils are dumped directly by suction dredgers in designated dumping areas [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Field Investigations of Underwater Mounds Formed by Hopper Dredge Discharges in a Coastal Environment

Dai

Ding

et al. 2020

JMSE

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In a coastal environment, this paper investigated the formation process and the cumulative shape of subaqueous mounds formed by hopper dredged discharges. Hydrological observations and field tests were performed to examine the flow features and ultimately generated morphology characteristics. A high-precision digital elevation model (DEM) was established by multi-beam depth sweeping (MBDS) in the experiment. Particular attention was paid to the formation of the mounds, the three-dimensional shape and the influence factors. The field measurements showed that the mounds were roughly symmetrical in space, and the tidal current, though of weak strength, played a certain role in shaping the profiles. Cone and volcanic cone mound tops were observed, featuring the main top shapes. The height and covered area of the mounds were proportional to the amount of dumped sediment, and they were also affected a lot by the water depth. The results of superimposed tests showed that the second placement over the existing mound resulted in a similar overall shape, but there was pronounced movement around the mound; additional discharged volumes at the same location mainly increased the mound height. The field tests provided a reference for understanding the sediment dumping in other similar coastal areas.

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“…In order to better understand the motion mechanism and stress state of the seafloor sediment sampler based on the application practice of the mud picker, researchers have studied the seafloor sediment sampling process from different perspectives through numerical simulation of the operation process of the mud picker in lakes, riverbeds and oceans based on the design of the mechanical structure of the mud picker, aided by the rapid development of simulation software. Guo et al 15 developed a new fidelity sampler for seafloor sediments, and studied and analysed its thermal insulation performance. Based on ANSYS software, a finite element model of the temperature of the sample cylinder was established.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and experimental study on seafloor sampling of an anchor-type mud collector based on SPH-FEM coupling method

Zhang,

Xue,

Liang

et al. 2024

Advances in Mechanical Engineering

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Marine sediments are important for research in scientific fields such as marine geology, environmental testing of waters, marine biology and seabed resource exploration. Among them, mud miner is an important way to obtain sediments. However, due to the complexity of the marine environment, the seabed sampling operation is a relatively difficult and complicated project. The structural design of the sampler, the operation mode, and the interaction between the sampler and the sediment affect the sampling effect, which leads to the low efficiency of the sampler operation. In order to investigate the main factors affecting the drag force of the sampler during seafloor sampling, this paper takes a simple and portable anchor-type mud collector surface sediment sampler as a study. This paper introduces the mechanical structure and working principle of an anchor-type mud collector, establishes a mechanical model of the mud collector seafloor sampling process and derives the main factors affecting the dragging force: internal friction angle; the horizontal angle of the bi-directional shaft rod; undercut angle [Formula: see text] of bottom cover and dragging speed. A FEM-SPH method based on the coupling of the finite element method (FEM) and the smooth particle hydrodynamics method (SPH) was proposed to simulate the dynamic process of mud collector subsea sampling, and the mechanical data of fine sand and clay were obtained through land-based experiments. Based on the comparison between experimental data and numerical simulation data, the simulation validity of the FEM-SPH method was verified. The results show that the drag force of the clay was greater than that of the fine sand in the experiment of cutting the lower cover of the mud collector into the fine sand and clay, the internal friction angle of the clay is greater than that of the fine sand; with the increase in horizontal inclination angle and the decrease in undercut angle, the dragging force gradually increased; The dragging speed ranged from 0.2 to 0.6 m/s, with an increase in the mass of clay and fine sand collected with increasing speed, resulting in a gradual increase in dragging force. This paper provides a new method to study the force of the mud collector, provides a theoretical method to reduce the intensity and difficulty of manual work in the sampling process and increase the efficiency of sampling.

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Study on the thermal insulation performance of a new seabed sediment fidelity sampler based on ANSYS

Cited by 8 publications

References 8 publications

Buckling Analysis of Two-Span Continuous Beams with Lateral Elastic Brace under Uniform Load

Buckling Analysis of Two-Span Continuous Beams with Lateral Elastic Brace under Uniform Load

Field Investigations of Underwater Mounds Formed by Hopper Dredge Discharges in a Coastal Environment

Numerical simulation and experimental study on seafloor sampling of an anchor-type mud collector based on SPH-FEM coupling method

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