Correction of analytical model for lateral-staging rocket with modal data using hybrid optimization algorithms

Shkapov, Pavel; Сулимов, А. В.; Sulimov, Valeri

doi:10.1063/1.5133179

Cited by 4 publications

(1 citation statement)

References 15 publications

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“…The effect of a seismic wave on an underground pipeline was considered in [20]. Accumulated experience demonstrates that direct simulation of real objects in the general case is not ensuring the required quality of the relevant analytical models [21].…”

Section: Introductionmentioning

confidence: 99%

Longitudinal vibrations of underground pipelines of finite length in medium surrounded by soil with different properties along pipeline length

et al. 2023

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An analysis of the dynamic response of an underground main pipeline under a longitudinal wave propagating in soil along the pipe is given in the article. The problem of the longitudinal wave impact on a pipeline of finite length, interacting with soil according to the elastic-viscous law, is considered. The ends of the pipeline are fixed to massive nodes that interact with the medium according to linear laws. Along the length of the pipeline, the coefficients of the elastic and viscous pipeline-soil interaction change depending on the coordinate. In this article, the influence of the coefficients of elastic and viscous interaction of the "pipe-soil" system is studied when these coefficients are coordinate functions. The variability of the values of the coefficients along the length of the pipeline leads to a change in displacements from 0 to 15% and strain from 0 to 18%, compared with the case when these coefficients are constant. Depending on the length of the pipeline, the response of the pipeline to seismic action is different. This is especially evident at the boundary points. Considering the weight of nodes leads largely to a decrease in the strain of the pipeline relative to the soil strain at the boundary points.

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Section: Introductionmentioning

confidence: 99%

Longitudinal vibrations of underground pipelines of finite length in medium surrounded by soil with different properties along pipeline length

et al. 2023

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Seismodynamics of Underground Pipelines Under Viscous-Elastic-Plastic Interaction with Soil

Khusainov

Khusainova

2023

Soil Mech Found Eng

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Application of finite difference method for solving problem of seismic resistance of underground pipelines

2023

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The paper analyzes the dynamic response of an underground main pipe under the action of a longitudinal wave propagating in soil along the pipe. The article assumes that the elastic pipe is of a finite length, and a linear viscoelastic model of the “pipe-soil” system interaction is considered. The problem is solved numerically using the explicit scheme of the finite difference method. A longitudinal wave in the soil is taken as a traveling sine wave. The article presents a comparative analysis of the results for certain values of elastic and viscous interaction coefficients, propagation velocity, and pulse duration. Under elastic interaction of the “pipe-soil” system, the reflection of the wave propagating in the underground pipeline at the boundaries of the pipeline coincides with the propagating wave in soil, leading to an increase in the maximum deformation of the underground pipeline, the value of which can double. The viscosity coefficient of interaction at the “pipe-soil” system contact leads to attenuation of the wavefront in the underground pipeline. For soils with values of viscous interaction coefficient of more than 100 kN·s/m2, this may lead to complete attenuation of the bursts at the wavefront in the pipeline. The choice of the step ratio in coordinate and time equal to the wave propagation velocity in the pipeline allows for obtaining results that coincide with the exact solution.

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Correction of analytical model for lateral-staging rocket with modal data using hybrid optimization algorithms

Cited by 4 publications

References 15 publications

Longitudinal vibrations of underground pipelines of finite length in medium surrounded by soil with different properties along pipeline length

Longitudinal vibrations of underground pipelines of finite length in medium surrounded by soil with different properties along pipeline length

Seismodynamics of Underground Pipelines Under Viscous-Elastic-Plastic Interaction with Soil

Application of finite difference method for solving problem of seismic resistance of underground pipelines

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