1) Unstable vibration
失稳振动
1.
On the basis of establishing the model of the system containing both support damping and rotor external damping, the film unstable vibrations of the system are calculated by the use of nonlinear method, then the methods and the concrete measures of narrowing unstable region are dealt with ,thus proving that the width and the amplitude of the unstable region is limited.
在建立包含支承阻尼和转子外阻尼在内的弹性支承滑动轴承系统模型的基础上，用非线性方法计算了该系统的油膜失稳振动，讨论了缩小失稳区的方法和具体措施。
2) precessing resonant instability
进动共振失稳
3) jitter
[英]['dʒitə] [美]['dʒɪtɚ]
跳动，振动，晃动;不稳定性(信号)，失稳，失步
4) flutter instability
颤振失稳
1.
For pined_pined,loosed midpoint support plate,it is found that the plate s buckling instability will happen first while the flutter instability will disappear.
发现板在两端简支、中点联结松动时 ,结构首先出现屈曲失稳 ,而不会发生颤振失稳。
2.
The wind tunnel sectional model tests reveal that the flexural galloping may occur in the hangers under small wind attack angles when the webs are not perforated while the torsional flutter instability may initiate in the hangers at low wind speed of wind attack angle round 20° when the webs are perforated.
节段模型试验发现,腹板不开孔吊杆在小攻角下可发生弯曲驰振;而腹板开孔的吊杆在20°攻角附近较低风速下可发生扭转颤振失稳,且发生扭转颤振失稳的风攻角区间受腹板开孔大小影响明显。
3.
An experimental study of flutter instability of H-shaped slender member with different sizes of slotted web is carried out using both section models and aeroelastic model.
通过节段模型与气弹模型风洞试验,研究了不同腹板开孔率的H型细长结构的风致颤振失稳特性。
补充资料：裂纹失稳扩展
分子式：
CAS号：
性质：材料内部裂纹尖端的应力场强度因子达到或超过材料的断裂韧性之后发生的裂纹快速扩展。裂纹失稳扩展将导致材料迅速断裂。
CAS号：
性质：材料内部裂纹尖端的应力场强度因子达到或超过材料的断裂韧性之后发生的裂纹快速扩展。裂纹失稳扩展将导致材料迅速断裂。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条