查询词典 mistuned

According to mistuned blade design for the asymmetry stator, the wake force on rotor changed from single frequency and higher amplitude to multi-frequency and lower amplitude.

不对称静子叶片分布非谐设计下，转子所受到的激振力由静子叶片均布情况下的单频率高幅值激振力转变为多频率成分低幅值激振力。

The perturbation methods are the common analyzing method for studying thevibratory response of the mistuned bladed disk, but different perturbation methodshave their own relying conditions on the system parameters. In this dissertation, threekey perturbation methods are studied for their application conditions. Their relyingconditions on the system parameters are summarized.

本文对三种常用摄动法的构造特点及其适用性进行了研究，总结了它们在分析失谐叶盘系统振动响应时对于系统参数的适用条件；针对自适应摄动法在分析失谐叶盘系统振动响应时，对于基系统模态的选择难以控制的问题，提出了一种模态自动选择法。

Features of forced response of the mistuned bladed disk under different system parameters like coupling degree, mistuning strength, viscous damping and non-linear friction strength were investigated.

研究失谐叶盘系统在不同的耦合强度、失谐程度、粘性阻尼系数、干摩擦强度等系统参数影响下的受迫响应特性。

To reduce the dynamic stress of rotor blades under the wake of front stator vane,an asymmetry stator mistuned design was conducted.

不对称静子叶片分布非谐设计下，转子所受到的激振力由静子叶片均布情况下的单频率高幅值激振力转变为多频率成分低幅值激振力。

In the present study, the effect of centrifugal force was investigated by three dimensional finite element analyses; the vibration characters of random mistuned blade-disc were also being investigated by probability methods and the Young's modulus of material of all blades are regarded as random parameters.

结果表明，离心力对失调叶片轮盘系统局部化振动有减弱作用；所有叶片弹性模量在5%误差范围的随机失调系统，其固有频率与非失调相差很小，即失调叶片—轮盘系统可以按照循环对称结构进行模态分析。

Theeffects of mistuning on the forced response are also analyzed in the frequency veeringregion. The outcomes of this dissertation improve the fundamental theories of thevibration localization of the mistuned bladed disk.

研究表明：在频率转向区中，叶盘系统模态高度密集，从而更容易导致叶盘系统产生较强的模态振型和振动响应的局部化。

They can be a support for thedesigner to look insight of the vibration mechanism of the mistuned bladed disk, andto predict its forced response. Therefore, the researches of this dissertation canprovide fundamental theories for studying and designing the power systems of thenew high performance aero-engines.

本文的研究结论，不仅在很大程度上完善和发展了研究失谐叶盘系统振动局部化问题的基础理论，也为设计人员正确理解失谐叶盘系统的振动机理及准确预测其振动响应提供了有效的方法和手段：并为进一步研制高性能的叶盘动力系统打下了理论基础。

The frequency and amplitude of wake force were deduced theoretically, while the influence of stator sector distribution and stator vane quantity on the wake force of vane was also discussed. Transient analysis was conducted for the forcing response of rotor blades under the same stator sector distribution and different quantities of stator vane, so an optimum asymmetry stator mistuned design was developed.

对不对称静子叶片非谐情况下激振力频率幅值进行推导，讨论了静子扇区分布和静叶数目选取对尾流激振力的影响，并对相同扇区分布不同静叶数目情况下转子叶片的强迫响应进行瞬态分析，给出不对称静子非谐设计的最优方案。

The deterministic and statistic methods are employed respectively to study theforced response of the mistuned bladed disk under various system parameters withrespect to the deterministic and random mistuning. In the statistic analysis, wepropose a method that calculates and compares the statistics of the maximum andaverage vibratory responses.

在进行统计分析时，特别地提出了对失谐叶盘系统的最大振动响应和平均振动响应进行统计和比较的分析方法，利用该方法可对失谐叶盘系统振动能量的集中程度进行分析，从而更全面地认识失谐叶盘系统振动响应的局部化特性。

Because the error mainly comes from theresonant region, the error correction method can only be used in resonant region, andcan effectively improve the efficiency of the statistical analyzing solutions. Two types of the mistuned bladed disks, whose friction damping are blade dryfriction damping and blade-to-blade dry friction damping, are modeled respectively. Amulti-harmonic method which can employ the fast Fourier transformationtechnique is proposed to investigate the vibratory response of the bladed disks withthese two types of nonlinear friction damping. Formulations of the solution for thesetwo types of motion functions are deduced. The characteristics of the forced responseof the bladed disks with these two dry friction damping are analyzed and summarizedunder various system parameters. The vibratory response of the bladed disk with dryfriction scatter mistuning is investigated.

针对叶盘系统中两类主要的非线性干摩擦阻尼形式，分别建立了具有叶片干摩擦阻尼和叶间干摩擦阻尼的失谐叶盘系统的非线性力学模型；提出了一种可利用快速傅立叶变换技术的多谐波分析方法；分别推导了具有这两类干摩擦阻尼形式的叶盘系统运动方程的求解公式；在各种系统参数条件下，研究了干摩擦阻尼失谐叶盘系统的受迫振动响应特性；对具有干摩擦散乱失谐的叶盘系统振动响应进行了研究，分析总结了干摩擦散乱失谐对叶盘系统振动响应特性的特殊影响规律。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。