失稳

Study of an on-line small disturbance voltage stability index considering dynamic characteristic of induction motor loads

为进一步研究负荷动态建模和受端系统小干扰电压失稳和短期大干扰电压失稳的预防和校正控制措施提供了有益的参考。

From the numerical results of critical conicity calculatians for bogies with different steering stiffness and different construction parameters, the paper concludes that the low conicity instability can be reduced by means of optimizing the bogie parameters to a va...

得到不同导向刚度下产生失稳的临界踏面锥度和不同锥度下的临界速度值。研究发现，通过参数的合理匹配，可使临界锥度降至常见最小锥度以下，从而可以避免低锥度失稳，为迫导向转向架的参数设计提出了一个新的准则。

The wall has no support during the construction stage and the calculationbased on the national standard GB 50018-2002 (Technical code of cold-formedthin-wall steel, structures) should be reliable and safe. The crankle destabilizationof the studs with cold-formed channel section should be taken into account whencalculating the load-carrying capacity. The warpings at both ends of the sectionshould be calculated without any constraint when converting the crankledestabilization into the slenderness rationλ_w.

墙体在施工阶段基本为无墙体支撑，此时，按现行国标《冷弯薄壁型钢结构技术规程》(GB 50018-2002)规定计算是可靠、偏安全的，在计算其承载能力时应考虑单轴对称冷弯卷边槽钢截面立柱弯扭失稳，在计算立柱弯扭失稳换算长细比λ_w时，截面两端翘曲宜按不受到约束条件计算。

The 1-4 order variation law of frequency, energy and distance of MS events before destabilizing can display the change rule of MS events. According to the variation law of the difference of frequency, energy and distance of micro seismic events before destabilizing, the fracture of rock mass can be precisely predicted. This is of great importance for safety of colliery.

微地震事件的距离、能量、频数的一到四阶差分均能够显示微地震事件的变化规律，根据未失稳岩体微震事件距离、频数、能量差分变化规律，能够准确地利用微震监测技术预报岩体破裂，这对于采用微地震监测技术解决矿山井下岩体破坏失稳预报具有重要指导意义。

The relationship between elastic strain energy and the reduction coefficient can be used as criteria in slope stability analysis using strength reduction method.

研究结果表明：采用强度折减法，当边坡处于稳定状态时，折减系数增大引起边坡变形增大，导致边坡体弹性应变能随之增大；但是，边坡岩土体能够承受的弹性应变能是有极限的，当折减系数增大到某一值时，边坡体的弹性应变能达到极限，再增大折减系数将导致边坡失稳破坏；边坡体弹性应变能与折减系数服从指数关系；利用弹性应变能与折减系数关系曲线得到的边坡安全系数与采用其他经典的方法所得边坡安全系数基本一致，弹性应变能随折减系数变化而变化的规律可以作为边坡稳定性强度折减法分析的失稳判据。

In contrast to unconstrained Euler buck1ing there are rich bifurcation points in the process of constrained buckling.

与不受约束的欧拉失稳相比，杆的限制失稳过程具有丰富的分叉点。

Falsework instability damage to the damage from the elastic stability of the instability that features (refer to the critical buckling load, and modal) is a limit on the basis of capacity.

模板支架的破坏为失稳破坏，由弹性稳定性分析得出的失稳特征是研究极限承载力的基础。

A new method relying on the Stroh formulism and the theory of the surface impedance tensor was developed to investigate the dynamic instability of interfacial slip waves.The concept of the surface impedance tensor was extended to the case where the wave speed is of a complex value,and the boundary conditions at the frictionally contacting interface were expressed by the surface impedance tensor.Then the boundary value problem was transformed to searching for zeroes of a complex polynomial in the unit circle...

基于Stroh公式和表面阻抗张量理论，提出了研究界面滑移波动态失稳问题的一种新的方法·该方法将表面阻抗张量概念推广到复波速域，并将摩擦接触界面上的边界条件以表面阻抗张量表示·最终将边值问题化归为求解一个复多项式在单位圆内的根·以弹性半空间与刚体平面相对稳态摩擦滑移为例进行了详细的分析，导出了一个4次复特征方程并讨论了方程在单位圆内解的特性，给出了滑移界面波失稳条件的显式解析表达式

According to the analysis of compression instability, a new kernel function is proposed which can remove the instability effectively.

本文在分析出现压缩失稳现象原因的基础上，提出了一种新的核函数，消除了压缩失稳现象。

With the aim of control pneumatic stability fault and ensure the safety and function of aero-engine,The method To survey and change The two pneumatic stability faults include speed lost and pant vibratility of aero-engine has been an important researchful subject matter.

如何对航空发动机失速和喘振这两类气动失稳进行测量、变换，以便对气动失稳进行控制，确保发动机安全和性能是当前国内外航空界的一项重要研究内容。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。