downhole ground 中文意思是什麼
downhole ground
解釋
井下接地；井下電位參照點-
Because the esp is 2000 ~ 3000 meters downhole, there is more 3000 meters power cable between the electric submergible motor and the ground instrument
由於潛油電泵機組位於2000 3000米的井下，在潛油電動機與地面設備之間需要長達3000米的動力電纜。 -
The paper discusses the designing proceed, theory and details of this simulation system, including the brief introduce of simulation system, the design of interaction graphic user interface, the 3d modeling of oil well ground facilities and downhole tools, the design of 3d engine for downhole operation simulation system, and explains the using of 3d animation in this system with a real example, and finally sums up the general regular pattern of simulation system designing
本文對這個虛擬模擬系統的設計過程、設計原理和設計細節進行了詳細的討論，包括井下作業模擬系統簡介、交互性圖形用戶界面的設計、井場設施和井下工具的三維建模、井下作業模擬系統的三維引擎設計等內容，舉例說明了三維動畫技術在模擬系統設計中的應用，總結了設計模擬系統的一般規律。 -
The variation of ground motion with depth is an important consideration in characterizing ground motion for embedded structures. in this paper, a study on the earthquake ground and underground motion by analyzing the surface and downhole data from hosokura mine array of japan and csmip geotechnical arrays of u. s. a. is conducted
本文的研究對象及地震動數據包括：美國加州強震觀測計劃（ csmip ）的6個土工臺陣（ geotechnicalarray ）的28個地震，包括ns 、 ew和un三分量共429條地震加速度時程。 -
In this part, pga, pgv and pgd are studied, the main results are as follows : 1 ) in general, pga decrease with depth and can reach maximum at surface ; the pga ratio with depth of downhole / surface is affected by magnitude and ground pga value, the bigger the magnitude and pga value, the smaller the pga decrement with depth ; the decrement with depth is much more significant in near - surface than that in deep downhole
加速度峰值沿深度的變化與地震的大小和場地條件有關。對于土層場地，一般說來，隨著震級和地表pga的增大，加速度峰值沿深度的下降梯度減小。對于「土層基巖」型場地，基巖面處的水平分量約是地表的1 3 . 7 ，豎向分量約是地表的1 3 . 2 。
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