instability criterion造句
例句与造句
- Study and application of sidewall instability criteria
井壁失稳判断准则及应用分析 - The influence of strain gradient is taken into account in the constitutive relation of coal or rock , the instability criterion of coal pillar is given , the influence factors of rock burst in coal pillar are analyzed
在煤岩体本构关系中考虑应变梯度的影响，得到了煤柱的失稳判据，进而分析了煤柱岩爆的影响因素。 - According to the former mathematical calculation models , the applied software , which uses the forming limit stress diagram as its instability criterion , is developed based on the sheet metal forming finite element code dynaform using visual c + +
根据以上所建立的数学计算模型,基于板成形专用有限元分析软件dynaform的环境,用visualc + +开发了以成形极限应力图作为判据的应用软件。 - From a nonlinear equation with boussinesq similarity on the f plane including friction dissociation and using a new kind of general energy as lyapunov function , we got the nonlinear subcritical symmetric instability criterion which a new kind of symmetric stability criterions . the nonlinear subcritical symmetric instability indicates that the larger amplitude disturb may cause the its instability to increase and then excite the mesoscale rainstorm
非线性亚临界对称不稳定判据是从含摩擦耗散的f平面上boussinesq近似下的非线性方程出发，以一种新的广义能量作为lyapunov函数，导得的一种新的对称稳定性判据，理论指出较大振幅的扰动可能出现非线性亚临界对称不稳定增长，从而激发中尺度暴雨扰动的生成。 - In view of the above reason , this thesis adopts the forming limit stress diagram as the instability criterion due to its independence of strain paths , which is acknowledged at home and abroad in the field of sheet metal forming , and develops the applied software for the special purpose finite element analysis code dynaform in order to provide it with a new instability criterion
本文基于板成形专用有限元分析软件dynaform ,以国内外板料成形领域认同的具有应变路径独立性优点的成形极限应力图为判据进行了应用软件的二次开发,以期为板成形有限元分析软件提供一个新的失稳判据。 - It's difficult to find instability criterion in a sentence. 用instability criterion造句挺难的
- The finite element numerical simulation analysis is an important method to predict sheet metal instability in the sheet metal forming process . and the current general - purpose finite element codes all choose the strain - based forming limit diagram as the instability criterion , which has the limitation of correlative to the strain path . thus it is very inconvenient to study sheet metal forming under complex strain paths
有限元模拟是板料成形过程中预测板料失稳的重要手段,考虑到当前通用的有限元软件都是以存在应变路径相关性缺陷的基于应变的成形极限图为失稳判据,以致在研究复杂应变路径板成形时极为不便。 - This thesis briefly analyzes some yield criteria and instability criteria to the sheet metal forming first . then according to the transformation rule from ultimate strain to ultimate stress , it establishes the mathematical calculation models of the forming limit stress diagram for the software development according to hill48 、 hill79 and hosford yield criterion irrespectively
本文首先分析了板料成形的屈服准则和失稳准则,然后根据极限应变到极限应力的转换关系,分别采用hill48屈服准则、 hill79屈服准则和hosford屈服准则,建立了用于软件开发的成形极限应力图的数学计算模型。 - First using analytical method , we obtained the nonlinear baroclinic subcritical instability criterion and symmetric subcritical instability criterion . second using numerical experiments , we analyzed the influenced fact on the baroclinic subcritical instability , and we also analyzed what the nonlinear subcritical symmetric instability effects on a rainstorm , and advanced a new mechanism produced the rainstorm
本文利用解析方法导得了大气中非线性斜压亚临界稳定性判据和对称亚临界稳定性判据；并分别用数值试验方法分析了斜压亚临界不稳定的影响因素以及亚临界对称不稳定在一场暴雨过程中所起的作用，提出了产生暴雨的新的物理机制。
