Vibration Characteristics of Unsaturated Runways Under Moving Aircraft Loads

Tang, Chuxuan; Lü, Zheng; Yao, Hailin; Guo, Shenglai; Han, Yongdian

doi:10.1142/s0219455421500656

Cited by 7 publications

(5 citation statements)

References 28 publications

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“…According to the compaction test, the relationship curve between water content and dry density of soil-rock mixture can be obtained, as shown in Figure 3. It can be seen that there is a parabolic relationship between dry density and moisture content of soil-rock mixture, and the optimum moisture content of gradation 1 is 13.2% and the maximum dry density is 1.623 g/cm 3 ; the optimum moisture content of gradation 2 is 14.0% and the maximum dry density is 1.650 g/cm 3 ; the optimum moisture content of gradation 3 is 14.5% and the maximum dry density is 1.870 g/cm 3 .…”

Section: Geotechnical Testsmentioning

confidence: 95%

“…Soil-rock mixture is a complex discontinuous medium material, which was composed of stones, soils as filling components, and pores. It has the characteristics of complex geological origin, diverse composition, and extremely uneven soil and rock particles across multiple orders of magnitude scales and structures [1][2][3][4]. Because soil-rock mixture is easy to get, it is often used for roadbed filling in construction [5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study on the Effect of Compaction Work and Defect on the Strength of Soil‐Rock Mixture Subgrade

Yan¹,

Zhan²,

Hu³

et al. 2021

Advances in Materials Science and Engineering

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Soil-rock mixture is a common filling material for earth dam and subgrade. In this study, research concerned on the evolution law of engineering characteristics of soil-rock mixture under different factors and the effect of defect on subgrade strength, and geotechnical tests were carried out to analyze the influence of different factors on engineering characteristics of soil-rock mixture in the study, and the physical model was carried out to analyze the effect of different compaction works on the resilient modulus, and the influence of defect on the strength was explored by manually preset loose body. The test results showed that (1) when the soil-rock mixture was graded, P = 78, the moisture content was 14%, and the engineering characteristics were optimal; (2) there was a positive correlation between compaction times and resilient modulus, and the stress transferred from the subgrade to soil was linearly distributed under the good condition of compactness; and (3) the existence of loose body not only reduces the modulus of resilience but also affects the stress transfer; the larger the loose body, the lower the resilient modulus and the greater the stress transfer.

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Section: Geotechnical Testsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of Compaction Work and Defect on the Strength of Soil‐Rock Mixture Subgrade

Yan¹,

Zhan²,

Hu³

et al. 2021

Advances in Materials Science and Engineering

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“…For example, Ruan and Lü analyzed the stress distribution law of the airport runway subgrade under dynamic aircraft loading [12]. Focusing their research on unsaturated runways, Tang et al researched vibration characteristics under moving aircraft loads [13].…”

Section: Introductionmentioning

confidence: 99%

“…Uneven excitation applied to the coupled system includes the uneven sequence of the runway itself and the vertical displacement of the asphalt surface layer under aircraft loading. According to the displacement compatibility principle, the vertical vibration displacement at any point x in the longitudinal direction of the runway can be expressed as Equation (13):…”

mentioning

confidence: 99%

Random Vibration Analysis of a Coupled Aircraft/Runway Modeled System for Runway Evaluation

et al. 2022

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Runway roughness is one of the most critical performance factors for runway evaluation, which directly impacts airport operation safety and pavement preservation cost. Properly evaluated runway roughness could optimize the decision-making process for runway preservation and therefore reduce the life cycle cost of the runway pavement asset. In this paper, the excitation effect of runway roughness is analyzed using a coupled aircraft/runway system. The coupled system is composed of a two degrees-of-freedom (2-DOF) aircraft model and a typical asphalt runway structure model established under runway roughness random excitation in this work. The dynamic differential equations for the coupled system are derived based on D’Alembert’s principle. The system’s vibration responses are determined via the pseudo excitation method and three response laws, i.e., the center of gravity acceleration (CGA), the dynamic load coefficient (DLC) of the landing gear, and the runway structural displacement, which are investigated under different modes. The results show that the first-order mode of the runway structure, vertical deformation, is the most significant of the four modes. Moreover, uneven excitation has a significant effect on the distribution of the aircraft’s vibration response. Compared with a single aircraft system, the developed coupled aircraft/runway system has different dynamic responses, and the degree of difference depends on the taxiing speed. The coupled effect on the CGA increases significantly with an increase in speed, with up to a 7.3% percentage difference. The coupled effect on the DLC first increases and then decreases as the aircraft speed increases, reaching a maximum of about 6% percentage difference at 120 km/h.

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“…After solving the problem of aircraft load application through numerical simulations, the research of most scholars focuses on several areas, such as parking lots, airport runways, aircraft carriers, dynamization, and mechanization of system equipment subjected to pressure waves [15][16][17]. Such studies are implemented to analyze the airport runway material, dynamic response, and stability under aircraft load [18][19][20][21]. In addition, because airport construction starts late, although investigations on the dynamic response of the space under airport runways subjected to aircraft loads have been conducted, the number of these studies are limited compared with those performed on airport pavement structures.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Influencing Factors of Safety and Stability of Tunnel Structure under Airport Runway

Yang

Wei

et al. 2022

Applied Sciences

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A six-degree-of-freedom mathematical model and mechanical balance equation of a “five-point-contact” aircraft are established in this study. The model and equation are used to investigate the safety and stability of a tunnel structure under the runway of an airport, particularly when aircraft taxi or move on the runway. ABAQUS is used to construct a three-dimensional finite element model of the cooperative deformation of the airport runway–soil–tunnel structure. The analysis focuses on the response and evolution of structural safety mechanical indices from the perspective of three influencing factors: type of aircraft, road surface, and burial depth. The results show that the distribution position of the main landing gear wheel is more concentrated using the dynamic load equation of different aircraft. A rigid pavement is not easily deformed when subjected to aircraft loads, whereas a flexible pavement has an excellent attenuation effect on diffusing forces. The shear stresses on the upper and lower arches of the tunnel structure differ depending on the pavement material. The deformation of the arches under shear stress is more intense than that of other parts. With an increase in burial depth, the tunnel structure withstanding the aircraft load disturbance exhibits an attenuation trend. The disturbance caused by soil stress to the tunnel structure must not be ignored. When the burial depth of the tunnel exceeds 64 m, the tunnel structure ceases to be disturbed by aircraft loads. The research results can significantly guide airport construction and be used as a reference for investigating the safety and stability of substructures under airport runways.

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Vibration Characteristics of Unsaturated Runways Under Moving Aircraft Loads

Cited by 7 publications

References 28 publications

Experimental Study on the Effect of Compaction Work and Defect on the Strength of Soil‐Rock Mixture Subgrade

Experimental Study on the Effect of Compaction Work and Defect on the Strength of Soil‐Rock Mixture Subgrade

Random Vibration Analysis of a Coupled Aircraft/Runway Modeled System for Runway Evaluation

Numerical Study of Influencing Factors of Safety and Stability of Tunnel Structure under Airport Runway

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