Finite Element-Based Simulation Analysis of Wetland Plant Mechanics

IF 4.2 2区 环境科学与生态学 Q1 ECOLOGY
Yanqi Wang, Guoxin Yan, Jiakai Liu, Zhenming Zhang
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Abstract

Despite tidal action, which is influenced by sea level rise, having a substantial impact on plant communities, salt marsh plant communities in coastal wetlands also act as a coastal zone barrier. Phragmites australis and Spartina alterniflora were selected for the experiment in the Yellow River Delta wetland. The mechanical characteristics of the plants in the Yellow River Delta were investigated by field sampling, and the mechanical experimental data were used to simulate plant stresses under natural conditions using the ANSYS model based on finite element theory. The results are as follows: Assuming that the 2 plants have the same stem diameter, the deformation of S. alterniflora is greater than that of P. australis under both static tension and pressure conditions, confirming the phenomenon that the P. australis material has stronger strength resistance properties. When this model was applied to the force analysis in the natural state, it was discovered that the material strength attribute of P. australis is higher than that of S. alterniflora . From the perspective of morphology and structure, the stout stem of S. alterniflora can greatly alleviate the stress of itself under external force and greatly reduce the invasion effect of external force because field conditions are limited and do not reflect immediate mechanical feedback. The model simulation provides a way to accurately and efficiently obtain the mechanical action of plant body when discussing the mechanical action similar to wave action on plant stem and to explain some ecological phenomena from the perspective of mechanics.
基于有限元的湿地植物力学模拟分析
尽管受海平面上升影响的潮汐作用对植物群落产生了重大影响,但滨海湿地的盐沼植物群落也起到了海岸带屏障的作用。选择芦苇和互花米草在黄河三角洲湿地进行试验。通过实地抽样调查黄河三角洲植物的力学特性,利用基于有限元理论的ANSYS模型,利用力学实验数据模拟自然条件下植物的受力情况。结果表明:假设两种植物的茎粗相同,在静张力和压力条件下,互花草的变形量都大于南芥,证实了南芥材料具有更强的抗强度性能。将该模型应用于自然状态下的受力分析,发现南草的材料强度属性高于互花草。从形态结构上看,由于田间条件有限,不反映即时的机械反馈,互花草粗壮的茎秆可以极大地缓解自身在外力作用下的应力,大大降低外力的入侵效应。模型仿真为探讨植物茎上类似于波的机械作用提供了一种准确、高效地获取植物体机械作用的方法,也为从力学角度解释一些生态现象提供了一种途径。
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来源期刊
Ecosystem Health and Sustainability
Ecosystem Health and Sustainability Environmental Science-Management, Monitoring, Policy and Law
CiteScore
7.10
自引率
2.00%
发文量
40
审稿时长
22 weeks
期刊介绍: Ecosystem Health and Sustainability publishes articles on advances in ecology and sustainability science, how global environmental change affects ecosystem health, how changes in human activities affect ecosystem conditions, and system-based approaches for applying ecological science in decision-making to promote sustainable development. Papers focus on applying ecological theory, principles, and concepts to support sustainable development, especially in regions undergoing rapid environmental change. Papers on multi-scale, integrative, and interdisciplinary studies, and on international collaborations between scientists from industrialized and industrializing countries are especially welcome. Suitable topics for EHS include: • Global, regional and local studies of international significance • Impact of global or regional environmental change on natural ecosystems • Interdisciplinary research involving integration of natural, social, and behavioral sciences • Science and policy that promote the use of ecological sciences in decision making • Novel or multidisciplinary approaches for solving complex ecological problems • Multi-scale and long-term observations of ecosystem evolution • Development of novel systems approaches or modeling and simulation techniques • Rapid responses to emerging ecological issues.
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