Numerical results showed that the proposed boundary could simulate the influence of far field and did not have the problem of low-frequency instability.
数值分析结果显示，该边界可较好地模拟远场介质的作用以及土体的辐射阻尼，具有良好的低频稳定性。
The low-frequency instability in variable speed constant frequency doubly fed induction generator(DFIG) widely used in wind power generation is investigated.
研究了广泛应用于风力发电的变速恒频双馈感应电机系统中的低频不稳定现象。
Low and intermediate frequency instability models are taken up first.
首先处理低频和中频不稳定性的模型。
Low or intermediate frequency combustion instability generally involves the interaction of several components of an engine system.
低频或中频燃烧不稳定性通常包含发动机系统中几个组件的相互作用。
Explosive mode coupling of low frequency interchange instability in partially ionized plasmas is studied.
本文研究部分电离等离子体中交换不稳定性的爆炸型模耦合。
The theoretical analyses predict that the drift wave is the most dangerois low frequency instability in the hot electron plasma.
理论上预示了在热电子等离子体中，等离子体漂移波是最重要的低频不稳定性。
A formula for analyzing the low frequency instability of the tube grain engine is derived through theoretical study.
通过研究导出一个分析管状装药发动机低频不稳定性的关系式。
It is shown that the flow instability with high frequency belongs to acoustic oscillation and the flow instability with low frequency is density wave instability.
高频脉动属于声波型脉动，低频脉动属于密度波型脉动。
The analysis results also indicate rub-impact faults induced by oil-film instability can produce some low-frequency components with small amplitude and oil whip can produce half frequency component;
油膜失稳引起的转定子碰摩故障，会产生一些低频成分，油膜振荡会产生半频成分；
The analysis results also indicate rub-impact faults induced by oil-film instability can produce some low-frequency components with small amplitude and oil whip can produce half frequency component;
油膜失稳引起的转定子碰摩故障，会产生一些低频成分，油膜振荡会产生半频成分；
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