永凍土壤 的英文怎麼說
中文拼音 [yǒngdòngtǔrǎng]
永凍土壤
英文
permafrost soil-
The harder the material under the permafrost is, the larger the chamber charge required.
永凍層之下的土壤越硬，所需要的藥室裝藥量也越大。Permanently frozen subsoil, occurring throughout the polar regions and locally in perennially frigid areas
永凍土永久冰凍的下層土壤，出現在整個北極地區和部分長期寒冷的地區A soil is classified as histosols if it does not have permafrost and is dominated by organic soil materials
如果某種土壤沒有永凍層而又以有機物質為主則可以將其劃分為有機土。This article analyzes the characteristics of permafrost earth, establishes mathematical model of earth thermal transfer, which consists of thermal transfer equation in thaw zone, the conservation relationship of heat quantity transferring from pipeline to earth and from earth surface to atmosphere, earth temperatures at thaw zone interface, heat transfer condition of solid phase changing into liquid phase at phase interface
文章分析了永凍土的特點，建立了永凍土地帶土壤傳熱數學模型：融化圈內外傳熱方程、管道向土壤和土壤表面向大氣所放熱量的守恆關系、融化圈界面處土壤溫度、相變界面處固相變為液相的傳熱條件。Taking an oil pipeline passing through permafrost as an example, the paper calculates and analyzes the positions and magnitudes of various maximum stresses, then put forwards the measures of reducing thermal deformation of pipeline in permafrost zone
還建立了理地管道模型，並以穿過永凍土地帶土壤的輸油管道為例，分析並計算了各種應力的最大值所在的位置和大小，提出了在永凍土地帶減小管道熱力變形的措施。分享友人