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Journal Article 6

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MEMS(microelectronic mechanical system) 1

classical 1

compressor 1

different 1

error 1

feedback force generator 1

full developed 1

heat transfer 1

low-speed 1

material-field series-expansion 1

modification method 1

negative electrostatic spring constant 1

nodal line 1

pressure cell 1

reflection wave 1

signal enhancement 1

silicon micromechanical z-axis gyroscope 1

software for superposition signal 1

stress monitoring 1

structural dynamics design 1

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Theoretical study of vibrating effect on heat transfer in laminar flow

Baoxing LI, Maocheng TIAN, Xueli LENG, Zheng ZHANG, Bo JIANG

Frontiers in Energy 2010, Volume 4, Issue 4, Pages 542-545 doi: 10.1007/s11708-010-0026-9

Abstract: Green’s function method was adopted to study the problem of vibrating effect on heat transfer in laminarflow with constant flux and the influence of Prandtl number and the vibrating frequency on the heatleads to a different distribution of the unsteady velocity and temperature; with a lower frequency, the vibrating

Keywords： vibrating full developed heat transfer

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A method of analysis for modal aero-damping of vibrating blade in incompressible flow

Jun XING, Lin LI,

Frontiers in Energy 2009, Volume 3, Issue 4, Pages 465-471 doi: 10.1007/s11708-009-0037-6

Abstract: By establishing a research model for aero-damping in a uniform incoming flow, the three-dimension analytical algorithm of the modal aero-damping based on the equivalent viscous damping principle was established. The algorithm, which is suited for low-speed flow, to compute aero-damping is based on classical lift line theory in aerodynamics, according to the analytical solution of unsteady aerodynamic force. According to the analytical equations, the modal aero-damping ratio for different nature frequencies of blades in various fluid field conditions can be solved, and the factors to affect the aero-damping can be determined.The first bend and the first torsion’s modal aero-damping ratios of a compressor blade are calculated by using the above algorithms. The results show that the aero-damping cannot be neglected comparing with the structure damping. It reflects the coupling degree between the flow field and the structure field, so the aero-damping is significant to compute the stress and life of blade.

Keywords： compressor different three-dimension analytical classical low-speed

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Achieving desired nodal lines in freely vibrating structures via material-field series-expansion topology

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0758-y

Abstract: Accurately controlling the nodal lines of vibrating structures with topology optimization is a highly

Keywords： nodal line topology optimization structural dynamics design material-field series-expansion

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A Realization to Enhance the Signal Noise Ratio With Superposition on the Same Phase Signal

Han Xiuting,Wang Jiechun,Jiao Zhenqaing,Gao Fei,Song Yubo

Strategic Study of CAE 2005, Volume 7, Issue 10, Pages 64-68

Abstract: p>This paper talks about method to enhance vibration signals gotten by hitting iron pipe to cause a vibrating

Keywords： vibrating wave reflection wave signal enhancement software for superposition signal

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Application of Vibrating Wire Pressure Cell for Stress Monitoring on Rigid Interface

Chen Zhijian,You Qingzhong,Lin Min,Li Xiaoyan

Strategic Study of CAE 2002, Volume 4, Issue 12, Pages 80-85

Abstract:

In this paper, the structure and testing principle of vibrating wire pressure cell are presented firstlyJiangyin Yangtze Bridge, the feasibility and difficulty to monitor stress of rigid interface using vibrating

Keywords： pressure cell structure testing principle error stress monitoring modification method

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Negative Electrostatic Spring Effect Analysis and Experimental Validation of Silicon Micromechanical Vibrating

Xia Dunzhu,Zhou Bailing,Wang Shourong

Strategic Study of CAE 2007, Volume 9, Issue 8, Pages 66-68

Abstract:

The error principle caused by structural process imperfection of silicon micromechanical z-axis gyroscope in open mode is introduced firstly. A new closed-loop control detection strategy is presented, which would has advantage of minimizing the initial capacitance difference and restraining the cross-talk coupling errors. The negative electrostatic spring effect of feedback force generator is analyzed in focus, and its linear mathematics module is calculated out. By computing the relation between the resonant frequency and feedback force added on the sense mode of MEMS z-axis gyroscope, the inner relation between the ne gative electrostatic spring coefficient in sense axis and the voltage on the feedback force generator is deduced indirectly. The theory has been testified by experiment, which will lay foundation for the next design of closed-loop scheme.

Keywords： silicon micromechanical z-axis gyroscope negative electrostatic spring constant feedback force generator MEMS(microelectronic mechanical system)