1) Foam Destabilization Mechanisms
泡沫失稳机理
2) Criteria for Foam Destabilization
泡沫失稳判据
3) instability mechanism
失稳机理
1.
Experimental study on sidewall instability mechanism of oil wells in the western Tuha Oilfield;
吐哈西部油田井壁失稳机理实验研究
2.
The effect of nonlinearity of pitch moment coefficient and module of rigidity of torsion on conditions of stability, instability points and instability mechanism is analyzed.
分析了升力矩系数和扭转刚度的非线性特性对于稳定条件、失稳点以及失稳机理的影响。
3.
Since the loads on the coal pillar and roof system were non-uniformly distributed,the instability mechanism of the system under non-uniformly distributed loading was studied.
基于温克尔假设,把坚硬顶板视为弹性梁,把煤柱等效为连续均匀分布的支撑弹簧,从而形成煤柱-顶板相互作用系统的力学模型;基于尖点突变理论,对采空区煤柱-顶板系统失稳机理进行了探索,导出了该系统失稳的充要力学判据,并得出了顶板破坏的临界厚度;同时,分析了影响系统失稳的主要参数,并给出了若干工程建议;最后以甘肃省某煤矿为例,计算了该矿体的临界顶板厚度。
4) mechanism of instability
失稳机理
1.
Based on field test and theoretical analysis,the mechanism of instability of slurry-supported excavations was investigated from angles of soil arching effect,time-dependent effect,overall stability,.
同时,根据现场试验和理论研究成果,从土拱效应、时间效应、整体稳定性和局部稳定性等方面分析了泥浆护壁开挖的失稳机理。
5) stable foam
稳定泡沫
1.
The stable foam,a special drilling fluid,is suitable for underbalanced drilling in low-pressure thief zones and depleted payzones,and can reduce lost circulations and protect formations as well.
稳定泡沫是一种特殊的钻井流体,适用于低压易漏地层和枯竭储层的欠平衡钻井,具有减少漏失和保护储层的功能。
6) rational speculative bubbles
理性投机泡沫
1.
The tests rational speculative bubbles in USA/JPYexchange rate in 1990～1998 with variance bound test,and adopts two sets of variance equalities to exclude the joint hypothesis of bubbles,irrational expectations and model specification.
采用方差边界法检验了美元/日元汇率在1990年至1998年间的理性投机泡沫,并用两组不同的方差不等式排除了泡沫、非理性预期及模型设定的联合假设。
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