early stress meaning in English

初始应力

Historically , early stress - induced changes in plants have been mainly detected after destructive sampling followed by biochemical and molecular determinations
摘要传统的作物胁迫早期症状诊断主要运用生化和分子方法对样品进行破坏性检测实现。
In this paper , it is studied and analyzed characteristic of stress , distortion etc . of pipe liner structure combining dahuofang transport water tunnel practice project , tunnel boring machine construction , and it is considered that affects internal force of pipe liner for early stress of underground structure and digging load . in nonlinear finite element calculation model , folium cells have been simulated among pipe liner and pipe liner and wall rock . under varies load condition , it has educed that changing rule of stress , distortion and load characteristic pipe liner in kinds of wall rock tunnel by analysis and calculation
本文结合实际工程，分析研究了大伙房水库输水隧道工程在采用掘进机施工方法的情况下，利用管片衬砌的结构应力、变形等受力特性，考虑地下结构初始应力和开挖荷载对衬砌内力的影响，采用薄层单元模拟衬砌管片之间、衬砌管片与围岩之间的非线性有限元计算模型，通过分析计算得出不同荷载工况下各类典型围岩段隧道衬砌管片受力特征、应力和位移变化规律。