1) dynamical damage monitoring
动力失稳监测
2) instability monitoring
失稳监测
1.
In order to prevent the catastrophic instabilities damage of steel structures,the methods of structural health monitoring and damage diagnostics were extended into the field of instability monitoring of steel structures,based on the relationships between structural instabilities and structural responses or their characteristic parameters.
为了预防钢结构发生灾难性失稳破坏,根据结构失稳与结构响应或特征参数之间的关系,将目前应用于结构健康监测和损伤诊断的方法扩展到钢结构失稳监测领域;评述并归纳了基于应变和位移变化趋势、基于振动-失稳相关性、基于薄壳体积改变率、基于失稳先兆的钢结构失稳监测方法;进一步对3种钢结构失稳监控部件进行了概念设计,包括钢套管压力监控、节点塌陷监控、坦拱和扁壳跃越失稳监控;总结了各种监测方法的特点和存在的问题。
3) instable critical load
失稳监界力
4) dynamic destabilization
动力失稳
1.
Fold catastrophe model of rock dynamic destabilization
岩体动力失稳的折迭突变模型
2.
Those mainly related to the mechanical properties and its deterioration in EDZ,non-stable subsidence of roof rocks and horizontal squeezing and its coupling effect so as to destabilization,delamination upon deepening rocks at roof induced to the localized dynamic destabilization.
破碎围岩环境下大断面巷道开挖必然形成大尺度采空区(large scale of mined-out-area,LSMA),其围岩介质的变形与失稳行为及过程很复杂,主要涉及到开采扰动区(excavation dis-turbed zone,EDZ)范围内围岩力学性态及强度劣化特征、顶部岩层非稳态下沉与水平挤压变形耦合作用诱致动力失稳、深层围岩离层演化至局部化冒落失稳等,且其变形从微尺度演化为大尺度(寸)过程具有复杂的非线性特征,这为灾害治理带来挑战。
3.
4 centrifugal compressor of Chinese Aluminum Manufacturer Shanxi Branch, this paper provides the distinctions of the methods for diagnosing and Identifying the dynamic destabilization of the seal-gap and the oil-film vibration of the centrifugal compressor, and identifies that the two sides are connected with each other and promoted each other.
通过中国铝业山西分公司的4#离心压缩机故障判断、检修实例,说明了离心压缩机的密封间隙动力失稳与油膜振荡故障的诊断识别方法的区别,同时证明了两者又存在互相关联和促进的关系。
5) dynamic instability
动力失稳
1.
Difference solution to dynamic instability of straight bars under elastic compression wave;
弹性压应力波作用下直杆动力失稳的差分解
2.
Based on the generalized variational principle of ferromagnetic bodies and the technique of magnetic field perturbation,this paper present an analysis on dynamic response and dynamic instability of the ferromagnetic beam-plate with unmovable simple supports under the two type pulse magnetic fields.
基于广义变分原理得到磁力计算模型和磁场摄动技术,研究了不可移简支铁磁梁式板在矩形和锯齿形两类典型脉冲磁场作用下的磁弹性动力响应特征及动力失稳现象。
3.
In the test, both the local dynamic instability for shell members and the global dynamic instability of the structure were observed.
对两个钢扁网壳结构模型在地震荷载作用下的动力稳定性进行了振动台试验研究，观察了模型的局部动力失稳和整体动力失稳现象，通过对试验测量数据结果的处理，给出了模型中杆件的内力时程曲线和结点位移时程曲线，对这些时程曲线进行分析，总结了结构产生动力失稳时的特征和规律，同时也给出了部分理论分析的结果，并结合试验结果对理论研究中给出的动力失稳定义和判定准则以及其它结论分别进行了验证和说明。
6) monitoring and controlling of instability
失稳监测与控制
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