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A v a i l a b l eo n l i n ea tw w w s c i e n c e d i r e c t O O m 一一 S c i e n c e D i r e c t JC h i n aU n i vM i n m g T e e h n o l1 8 2 0 0 8 0 6 2 9 0 6 3 3 J O U R N A LO FC H I N AU N I V E R S I T YO F M I N I N G International Public Association Academy of Navigation and Motion Control ANMC American Institute of Aeronautics and Astronautics AIAA TECHNIQUE AND DEVICES FOR EXPERIMENTAL INVESTIGATION OF LINEAR ACCELEROMETER DYNAMIC CHARACTERISTICS In our paper we discuss the technique and devices for measuring dynamic characteristics of linear accelerometers which are applicable to utilization at the manufacturing plants where accelerometers are being produced 3 外文期刊 Berthelot JM Sefrani Y Damping analysis of unidirectional glass fiber composites with interleaved viscoelastic layers Experimental investigation and discussion The article investigates the damping of unidirectional glass fiber composites with a single or two interleaved viscoelastic layers The experimental damping characteristics are derived from flexural vibrations of cantilever beams as a function of the fiber orientation The experimental results are analyzed considering the modeling developed in a previous article Berthelot J M Damping Analysis of Orthotropic Composites with Interleaved Viscoelastic Layers Modelling Journal of Composite Materials in press The analysis considers the variations of Young s modulus and damping of viscoelastic layers with the frequency Finally the article presents the effects of Young s modulus and the damping of a viscoelastic layer interleaved in the middle plane of unidirectional laminate The results are also reported for the case of external viscoelastic layers 4 外文期刊 Ji BH Wang LT Yuan Q Meng QJ Liu DY Zhang GH Experimental investigation of the dynamic characteristics of the damped blade The test facility and measurement system for the investigation of the dynamic characteristics of a damped blade are described The test results are analyzed and some important conclusions are drawn It is found that dry friction between the dampers or between damper and blade is a very effective means of reducing the vibration of a blade The resonance frequency the response amplitude and the relative damping ratio can all be influenced by dry friction High harmonic waves on the response ofthe blade which are caused by dry friction are observed in the test However the wave response of the damped blade is still basically harmonic The normal force acting on the rub surfaces of the damped blade will influence the dynamic characteristics of the blade Since the damped blade system is non linear due to dry friction the external exciting force can also influence the dynamic characteristics of the blade C 1998 Academic Press Limited References 5 5 期刊论文 宋强 孙逢春 马金奎 滑动轴承油膜参数识别的新算法及试验研究 北京理工大学学报2002 22 6 提出一种滑动轴承油膜动力特性系数 油膜阻尼系数和油膜刚度系数 试验识别新算法 利用振动理论和最小二乘方法推导出识别算法的数学模型 并 进行了试验研究 试验结果表明 该方法可以有效地抑制无用信号 具有较高的识别精度 利用该算法不需要事先测量基础刚度和阻尼 同时还可以识别轴颈 的等效质量 6 会议论文 Zhu Changsheng Theoretical and experimental investigation into dynamic characteristics of a rotor supported on a disk type magnetorheological fluid damper 2007 The dynamic characteristics of an overhung flexible rotor supported on a disk type magnetorheological MR fluid damper based on shear mode were studied both experimentally and theoretically The effects of applied current rotor imbalance and MR fluid on the dynamic characteristics of the rotor damper system were examined The theoretical analysis was based on the Bingham fluid model The theoretical results are basically in agreement with experiments for the lower weight percentage MR fluids but there is a great difference for the higher weight percentage MR fluids For the higher weight percentage MR fluids a stiffening effect of the MR fluid was experimentally observed The rheological behaviors of a real MR fluid are quite complex and the Bingham model cannot completely describe the rheological behavior of the higher weight percentage MR fluids The stiffening effect of the MR fluid should be included in modeling the MR fluid based dampers 7 外文期刊 A Cinitha K Muthumani G M Samuel Knight Analytical and experimental investigation on dynamic characteristics of steel space frame model This paper presents the dynamic characteristics of a steel space frame model both analytically and experimentally Approximate analysis and finite element analyses were done to predict the fundamental period Rayleigh s and Dunker ley s methods were used to estimate the lower and upper bounds of periods Two shape functions of beam mass system was proposed by satisfying the differential equations of motion and by imposing the corresponding boundary and compatibility conditions associated with the masses Impact tests were conducted to find the dynamic characteristics experimentally Finite element analysis was carried out using a source code The numerical analysis closely predicted experimental behaviour Parametric studies have been carried out on modified numerical model to investigate the effect of aspect ratio of the building size of sections spacing of columns and bracings on the fundamental periods of the building Based on the experimental and analytical investigations the dynamic behaviour of moment resisting steel space frame is well established 8 期刊论文 郭良斌 包钢 Guo Liangbin Bao Gang 静压气体球轴承动态特性的实验研究 润滑与密封2006 5 建立了静压气体球轴承气膜位移 动态力频响函数的数学模型 计算结果表明 轴承气膜频响函数的幅相频率特性随轴承工作点和摄动频率的变化而变 化 表明气膜系统是一个强非线性系统 介绍了动特性实验装置的工作原理及系统固有模态对测试结果的影响 测试结果表明 在22 400 Hz的频段内 当气 膜高度不大于70 m时 采用作者提出的静压气体球轴承频响函数计算方法 可以准确地计算出气膜位移 动态力频响函数的幅频特性 实验装置尚不具备 相频特性的测试条件 有待于将来的进一步改进 9 外文会议 Farhang Daneshmand Amin Zare Yousef Bazargan Lari Babak Assadsangabi Taherh Liaghat American Society of Mechanical Engineers ASME NUMERICAL AND EXPERIMENTAL INVESTIGATION OF DYNAMIC CHARACTERISTICS OF THE BOTTOM OUTLET OF VANIAR DAM Dynamic characteristics of the service gate of Vaniar Dam are studied in this paper Feature of pressure fluctuations induced by turbulence on the skin plate at different local openings is investigated which is the basic dynamic load acting on the gate The Fast Fourier Transform FFT algorithm is used to convert a digital signal in the time domain into a set of points in the frequency domain Finite Element Method FEM is also used to analyze the free vibration characteristics of the gate at different openings The paper presents a numerical procedure based on the finite element discretization that treats vibration analysis of the service gate The natural frequencies obtained by FEM are compared with the frequencies of pressure fluctuations measured in the hydraulic model test of the outlet to investigate the avoidance of resonance phenomena at the gates The mode shapes of the gate are also presented 10 外文会议 Farhang Daneshmand Amin Zare Yousef Bazargan Lari Babak Assadsangabi Taherh Liaghat NUMERICAL AND EXPERIMENTAL INVESTIGATION OF DYNAMIC CHARACTERISTICS OF THE BOTTOM OUTLET OF VANIAR DAM Dynamic characteristics of the service gate of Vaniar Dam are studied in this paper Feature of pressure fluctuations induced by turbulence on