静态和动态有限元模型在刚性路面结构中的机械响应对比研究

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-07-22 DOI:10.3390/aerospace11070596
Qiao Meng, Ke Zhong, Yuchun Li, Mingzhi Sun
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引用次数: 0

摘要

机场跑道的安全性对保证飞机起飞、降落和滑行非常重要,而利用 LS-DYNA 对路面结构在动态和静态载荷下的力学响应进行比较的研究还很少。这项工作的目的是分离两种分析方法来研究刚性机场道面的力学响应。首先,建立了一个机场轮胎-路面耦合模型,以评估动态和静态分析的适用性。然后,在动态和静态分析中研究了着陆俯仰角、下沉速度和轮胎压力对跑道有效应力、有效应变和 Z 位移的影响。最后,通过统计产品和服务解决方案(SPSS)中的回归分析,对影响因素的显著性进行了分析。结果表明,跑道的有效应力、有效应变和 Z 位移随着着陆俯仰角的减小而增大,同时也随着下沉速度和轮胎气压的增大而增大。结果表明,在轮胎压力和下沉速度较高时,动态分析与静态分析在路面机械响应方面的差异逐渐扩大。换句话说,当着陆俯仰角较大而轮胎气压较小时,可以采用静态分析方法来评估动态力学行为。在力学响应的各种因素中,胎压的影响最为明显,其次是下沉速度和着陆俯仰角。该研究提出了一种理解复杂多变条件下跑道力学行为的新方法,评价了动态和静态力学分析方法的适用性,明确了刚性跑道动态和静态力学分析中的关键因素,为提高和保持路面设施的抗冲击性能提供了技术支持。
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Comparative Study on Mechanical Response in Rigid Pavement Structures of Static and Dynamic Finite Element Models
The safety of airport runways is important to guarantee aircraft taking-off, landing, and taxiing, and the comparison of the mechanical response of pavement structures under dynamic and static loading by LS-DYNA has rarely been studied. The purpose of this work is to separate two analysis methods to investigate the mechanical response of rigid airport pavements. Firstly, a tire–road coupling model of an airfield was established to evaluate the suitability of dynamic and static analyses. Then, the effects of landing pitch angles, sinking speeds, and tire pressures on the effective stress, effective strain, and z-displacement of the runway were investigated for both dynamic and static analysis. Finally, the significance of influence factors was analyzed by regression analysis in Statistical Product and Service Solutions (SPSS). The results indicated that the effective stress, effective strain, and z-displacement of the runway increased with a decrease in the landing pitch angle, which also increased with an increase in the sinking speed and tire pressure. It was demonstrated that the difference in pavement mechanical response between dynamic and static analyses progressively widened at high tire pressure and sinking speed. In other words, the static analysis method can be adopted to assess the dynamic mechanical behavior when the landing pitch angle is large and the tire pressure is small. Among the various factors of mechanical response, the effect of tire pressure was the most obvious, followed by sinking speed and landing pitch angle. The work proposes a new approach to understanding the mechanical behavior of runways under complicated and varied conditions, evaluates the applicability of the dynamic and static mechanical analysis methods, identifies key factors in the dynamic and static mechanical analysis of rigid runways, and provides technical support for improving and maintaining the impact resistance of pavement facilities.
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
期刊介绍: ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.
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