Modal Analysis of Beam Structures with Random Field Models at Multiple Scales

Feng, Dan

doi:10.1155/2021/8847771

Cited by 3 publications

(2 citation statements)

References 65 publications

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“…Correlation distance reflects the relationship between microcosmic composition and macroscopic properties of soil [30]. On the microscale, the soil is a loose deposit mixture composed of soil particles, pore water, pore air, and other materials.…”

Section: Action Mechanism Of Correlation Distancementioning

confidence: 99%

Influence of Correlation Distance of Soil Parameters on Pile Foundation Failure Probability

et al. 2023

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Spatial variability of soil parameter distribution is crucial to calculating the pile foundation failure probability. Traditional reliability design methods describe the dispersion degree of soil parameters with their point variance without considering the influence of correlation distance. In this paper, static cone penetration test data of a project site are used, and random field theory is introduced to describe the average spatial characteristics of soil parameters. Then, the method of spatial average is used to calculate the correlation distance of soil parameters in each foundation soil layer. Given the influence of the correlation distance, a variance reduction function is determined to convert point variance to spatial mean-variance and further calculate the failure probability of pile foundation with the Monte Carlo method to study the influence of correlation distance on pile foundation failure probability. Results show that the spatial variability of parameters can be better reflected, and project cost can be reduced by considering the influence of correlation distance during the pile foundation design process. These results lay a foundation for further research on the pile foundation reliability design method.

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Section: Action Mechanism Of Correlation Distancementioning

confidence: 99%

Influence of Correlation Distance of Soil Parameters on Pile Foundation Failure Probability

et al. 2023

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“…Te simulations revealed that as the valve opening decreases, the number of particles distributed upstream of the fashboard increases [11,12]. Modal analysis of beam structures has been performed in [13] using multiple-scale random feld models. Tey modelled the heterogeneous material properties and their cross-correlation using random feld theory.…”

Section: Introductionmentioning

confidence: 99%

Modal Analysis and Flow through Sectionalized Pipeline Gate Valve Using FEA and CFD Technique

Sozinando

Tchomeni

Alugongo

2023

Journal of Engineering

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Sectionalized gate valves can reduce the volume of product released in the event of a buried pipeline failure or rupture. The risk of pipeline failure is a constant and common occurrence, and many factors can lead to pipeline incidents. In this paper, the free undamped vibration of the pipeline, sectionalized gate valve structure, and the dynamics of the fluid passing through the system are investigated. First and foremost, a modal analysis based on finite element analysis (FEA) is introduced as a fundamental linear dynamics analysis to provide insight into how a pipeline sectionalized gate valve structure may respond to different types of dynamic loading. Secondly, an implicit numerical analysis using computational fluid dynamics (CFD) is employed to describe physical quantities such as the flow velocity profiles at different stream positions and pressure fields at different points in a control volume. Through modal analysis, the effective mass factor shows the mass involved in each mode and helps identify modes with high potential to cause damage and prioritize efforts to address them. The CFD suggests that the sectionalized design of the gate valve leads to a strong vorticity of the fluid in the transversal direction of the flow and a decrease in efficiency due to pressure drop.

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Analysis of Mechanical Characteristics of Impeller of Spray Duster Based on ANSYS Workbench

Sun¹,

Yang

Li³

2022

J. Phys.: Conf. Ser.

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The spray dustless machine is an important environmental protection equipment for harnessing haze. The booster impeller of the spray dustless machine is one of the decisive factors of the booster capacity. The stability of the blade directly determines the reliability of the spray duster. In this paper, ANSYS Workbench is used to analyze the mechanical characteristics of a certain type of spray dustless blade. The results show that: under the rated condition, the maximum equivalent stress of the impeller is 55.6Mpa, which is far less than the allowable stress of the impeller material 415Mpa, the maximum deformation of the circumferential position at the bottom of the blade is 1.2mm, and other deformation positions are mainly the outer edge of the blade, which can be optimized later. The interference frequency is far away from the vibration frequency of the first two modes, so resonance will not occur.

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Modal Analysis of Beam Structures with Random Field Models at Multiple Scales

Cited by 3 publications

References 65 publications

Influence of Correlation Distance of Soil Parameters on Pile Foundation Failure Probability

Influence of Correlation Distance of Soil Parameters on Pile Foundation Failure Probability

Modal Analysis and Flow through Sectionalized Pipeline Gate Valve Using FEA and CFD Technique

Analysis of Mechanical Characteristics of Impeller of Spray Duster Based on ANSYS Workbench

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