失稳

基本解释 (translations)

destabilization

与失稳相关的网络例句 [注：此内容来源于网络，仅供参考]

The formula can be used in approximate calculation of instable critical load of high pier in the design and construction.

本文利用能量原理的Ritz法，在对截面惯性矩变化作线性假定后，推导出变截面空心薄壁高墩失稳临界荷载近似计算公式，可用于设计施工中对高墩失稳临界荷载的近似计算。1中心压杆稳定理论及能量原理中心压杆的失稳问题是稳定问题中的一个最基本的问题。

In the framework of non-equilibrium elastoplastic mechanics, the classic finite element method is extended to the analysis for post-failure state of structure, where the plastic complementary energy norm serves as the criterion of global stability while the unbalanced force and its development indicates the pattern and path of destruction.

在非平衡态弹塑性力学框架下，将经典有限元拓展到结构失稳后的分析，塑性余能范数即可作为库群失稳判据，而不平衡力及其发展则表征了库群失稳破坏的形态和演化路径。

The analysis model of nonlinear finite element of this structure is established, and the describable method of initial displacement is given. Using the analysis model, the influence of different thickness of steel web and different initial displacement on load bearing capacity and critical load of a steel concrete continuoes composite beam is analyzed.

建立了钢混凝土组合结构的非线性有限元分析模型，给出了初始挠曲的定量描述方法，分析了不同厚度腹板连续组合梁的失稳临界荷载，不同初始挠曲对相同厚度腹板的极限承载力和失稳临界荷载的影响，以及相同初始挠曲对不同厚度腹板的极限承载力和失稳临界荷载的影响

The larger subharmonic component will be introduced into the system after the instability of system periodic motions, the motion of systems will be nonsynchronous precession and the amplitude of alternate stress in the rotor shaft is high. The long-term existence of instability will directly threaten the safe running of the rotor systems. Research on the influence of the change of system parameters on the system dynamical behaviors, the stability of system periodic solutions with the change of system rotational speed and the system motion after instability will have the theoretical and engineering-oriented significance for the long-term safe running of large-scale rotating machinery.

转子系统失稳后会产生较大的低频振动分量，系统运动出现非协调进动，系统转轴中会产生幅值很大的交变应力，转子失稳状态的存在直接影响系统的安全运行，因此研究转子系统自身参数的变化对系统动力稳定性的影响，研究系统周期解随工作转速的变化情况及其失稳后的运动规律，对大型旋转机械的安全稳定运行具有重要的理论意义和工程实用价值。

Overbreak excavation instability and local instability are indicated on the phase of construction about soil nail wall on the base of different instability situation about two cases,when excavation beginning.

结合两个纯土钉墙工程实例，根据工程失稳时新开挖土层的不同失稳现象，提出了土钉墙施工失稳有超挖失稳和局压失稳两种类型。

Fracture is caused by sheet's tensile instability, Hill's totalized instability theories and Swift's diffuse instability theories which based on continuous mechanics are applied to isotropic blank; Marciniak and Kuczynski's theories are applied to orthotropic blank, which introduced thickness imperfections normal to the principal stress and strain direction as a groove pre-existing defects in the material. The stability of each part of blank at each moment is described by numerical method, and the results are shown by computer simulation, thus the fracture in sheet forming can be predicted preciously.

拉裂是由于拉伸失稳引起的，以连续体力学为基础的Hill集中性失稳理论和Swift分散性失稳理论应用到各向同性板料进行失稳判定；将Marciniak和Kuczynski的凹槽损伤失稳理论应用到正交各向异性板料拉伸失稳判定，对板料各处在成型过程中不同时刻的稳定性进行数值化描述，并运用计算机仿真技术进行直观的表现，可以准确地预测板料成型中可能出现的拉裂现象。

The results show that SCM can effectively control the buckling of axial compression steel member. And it can be used in spatial structure which is sensitive to the buckling of compression steel member, such as truss structure, grid structure and reticulated shell structure.

分析结果表明：套管构件作为失稳控制措施能够使得轴心受压钢构件失稳得到有效控制，可以应用于桁架、网架以及网壳等对受压钢构件失稳比较敏感的一类空间结构。

Based on the total potential energy principle, the cusp catastrophic model for instability and failure of deep-buried tunnel surrounding rock is established. Through the observed data of settlement values of typical section vault of deep-buried tunnel and the sudden threshold values of displacement of each monitoring section, the variable values of vault settlement function are obtained, and the stability of deep surrounding rock in tunnel is decided.

运用突变理论探讨了深埋隧道失稳的机制；根据总势能原理，建立了隧道失稳的尖点突变模型，导出了失稳的力学判据条件；并基于深埋隧道典型断面拱顶下沉量现场量测的数据，计算出拱顶下沉函数的各变量值，由各监测断面位移突变阀值来判别深埋隧道围岩的稳定性，分析结果与实际施工围岩情况一致。

The following exciting results are revealed: 1 When considering the influence of some nonlinear elements such as hard-limit of exciters, the effects of some devices such as Power System Stabilizer and Static Var Compensator which can introduce positive damping in power system, the reasonability of system parameter values in simulation, the SNB surface and HB surface on the boundary of SSSR will turn close to each other and even coalesce together; 2 Under some conditions, coupling between slow exciters and shunt capacitors will bring negative damping in power system dynamics, which increases the possibility of oscillatory instability. So the power system with mass shunt compensators is easily subjected to the oscillatory instability. In recent years, chaotic phenomena of power system have been reported many times. Some simulation studies even found chaos existing inside the power system SSSR. In this dissertation, chaotic phenomena in power systems are thoroughly studied in order to make clear the relation of chaos and SSSR. The following results are derived: 1 Based on Li-Yorke Theorem and their definition on the chaos, the existence of chaos in power system is verified; 2 Three possible routes of causing chaos in power system are found and deeply investigated. They are route of cascading period doubling, route of directly initial energizing and route of torus bifurcation (or quasi-periodicity). The latter two routes are investigated for the first time in power system stability studies; 3 When the stability conditions of chaos are broken, it is found they can lead to voltage collapse, angle divergence, or voltage collapse with angle divergence simultaneously.

针对在电力系统小扰动稳定区域内可能存在混沌吸引域的有关报道，本文深入研究了电力系统混沌现象的出现途径和与系统失稳模式之间的关系：1利用Li-Yorke定理和Li-Yorke的混沌定义，从理论上证明了电力系统混沌现象的存在性；2发现了电力系统中导致混沌出现的三种可能途径：倍周期分岔导致混沌、初始能量直接激发混沌和经由环面分岔导致混沌，并对后两种新发现的途径进行了较为细致的研究；3发现了混沌极限环破裂导致电压崩溃、角度失稳以及电压崩溃和角度失稳同时出现的现象，其中混沌极限环破裂导致系统角度失稳和电压崩溃及角度失稳同时出现的现象均属首次报道；4证明由微分-代数方程描述的系统模型，其小扰动稳定域的边界只包含HB、SNB和SIB三种分岔界面，在SSSR的内部和边界上，均不可能存在会导致混沌的点，从而将混沌现象排除在小扰动稳定域的研究之外，简化了后者的研究工作。

Following the concept of unstable frequency ,we propose a novel and simple method for solving the system′s uns.

分析了系统的稳定性，根据失稳频率的概念，提出了求解系统失稳频率的一种新颖而又简单的方法，并据此求出了失稳转速。

与失稳相关的网络解释 [注：此内容来源于网络，仅供参考]

buckling：失稳

从CECS 164 技术规程规定的计算管壁失稳的临界压力公式:可以看到分母构成由管材参数和土壤参数的乘积,如果管材参数--环刚度过小,即使土壤参数-管侧综合变形模量大,乘积也会较小. 换句话说,失稳的临界压力会较低,容易出现压屈失稳(Buckling)现象.

buckling deformation：失稳变形

buckling deformation 翘曲变形;失稳变形;皱折变形 | buckling deformation 失稳变形 | buckling factor 失稳因数

buckling deformation：翘曲变形;失稳变形;皱折变形

buckling deformation 翘曲变形 | buckling deformation 翘曲变形;失稳变形;皱折变形 | buckling deformation 失稳变形

crippling：局部失稳破坏

cripple 身体障害 | crippling 局部失稳破坏 | crises 危险期

instability：失稳

承受外压载荷的壳体,当外压载荷增大到某一值时,壳体会突然失去原来的形状,被压扁或出现波纹,载荷卸去后,壳体不能恢复原状,这种现象称为外压壳体的屈曲(buckling)或失稳(instability).

angle of loll：失稳横倾角(装载,驻坞,搁浅)

"横倾角","angle of list" | "失稳横倾角(装载,驻坞,搁浅)","angle of loll" | "最大扶正力臂角","angle of maximum righting lever"

thermolability：热失稳性

thermokarst ropography 热喀斯特地形 | thermolability 热失稳性 | thermolize 表面热处理

yaw unstability：偏航失稳

yaw damper 抗偏器 | yaw unstability 偏航失稳 | yaw vane 侧滑片

local unstability：局部失稳

local submerged slope 局部浸水边坡 | local unstability 局部失稳 | local ventilation 局部通风

instability wrinkling：失稳起皱

种系突变:Microsatellite instability | 失稳起皱:instability wrinkling | 屈曲荷载:Instability load