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B. VIDHYA,K. N. SRINIVAS
《能源前沿(英文)》 2016年 第10卷 第4期 页码 424-440 doi: 10.1007/s11708-016-0423-9
关键词: flux reversal generator air velocity computation fluid dynamics thermal analysis vibration analysis finite element analysis
Conformal analysis of fundamental frequency of vibration of elastic clamped plates
QI Hongyuan, ZHU Hengjun
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 429-432 doi: 10.1007/s11465-007-0073-z
Guilian YI, Yunkang SUI, Jiazheng DU
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 229-234 doi: 10.1007/s11465-011-0128-z
To reduce vibration and noise, a damping layer and constraint layer are usually pasted on the inner surface of a gearbox thin shell, and their thicknesses are the main parameters in the vibration and noise reduction design. The normal acceleration of the point on the gearbox surface is the main index that can reflect the vibration and noise of that point, and the normal accelerations of different points can reflect the degree of the vibration and noise of the whole structure. The K-S function is adopted to process many points’ normal accelerations as the comprehensive index of the vibration characteristics of the whole structure, and the vibration acceleration level is adopted to measure the degree of the vibration and noise. Secondary development of the Abaqus preprocess and postprocess on the basis of the Python scripting programming automatically modifies the model parameters, submits the job, and restarts the analysis totally, which avoids the tedious work of returning to the Abaqus/CAE for modifying and resubmitting and improves the speed of the preprocess and postprocess and the computational efficiency.
关键词: Abaqus secondary development Python language vibration and noise reduction K-S function vibration acceleration level
Pengfei LI; Jinquan ZHANG; Shengqi MEI; Zhenhua DONG; Yan MAO
《结构与土木工程前沿(英文)》 2022年 第16卷 第2期 页码 239-249 doi: 10.1007/s11709-021-0804-y
关键词: vehicle-bridge vibration system dynamic analysis stress-dependent damping energy dissipation
Vibration analysis of medium and small span bridges subjected to mixed marshalling freight trains
LI Qi, WU Dingjun, HUANG Xiaobin
《结构与土木工程前沿(英文)》 2008年 第2卷 第2期 页码 133-138 doi: 10.1007/s11709-008-0019-5
关键词: train-bridge vibration vibration characteristic associated computer train-bridge phenomenon
Vibration analysis of blade-disc coupled structure of compressor
WANG Chunjie, SONG Shunguang, ZONG Xiao
《能源前沿(英文)》 2008年 第2卷 第3期 页码 302-305 doi: 10.1007/s11708-008-0064-8
关键词: blade-disc coupling assembly experiment vibration blade-disc structure
Free vibration analysis of cracked thin plates by quasi-convex coupled isogeometric-meshfree method
Hanjie ZHANG,Junzhao WU,Dongdong WANG
《结构与土木工程前沿(英文)》 2015年 第9卷 第4期 页码 405-419 doi: 10.1007/s11709-015-0310-1
关键词: meshfree method isogeometric analysis quasi-convex isogeometric-meshfree method free vibration cracked thin plate
Nazim Abdul NARIMAN
《结构与土木工程前沿(英文)》 2017年 第11卷 第4期 页码 480-501 doi: 10.1007/s11709-017-0435-5
关键词: vortex induced vibration reynolds number kinetic energy vorticity latin hypercube sampling
Free vibration analysis of laminated FG-CNT reinforced composite beams using finite element method
T. VO-DUY, V. HO-HUU, T. NGUYEN-THOI
《结构与土木工程前沿(英文)》 2019年 第13卷 第2期 页码 324-336 doi: 10.1007/s11709-018-0466-6
关键词: free vibration analysis laminated FG-CNTRC beam finite element method first-order shear deformation theory composite material
An investigation into the vibration of harmonic drive systems
M. Masoumi, H. Alimohammadi
《机械工程前沿(英文)》 2013年 第8卷 第4期 页码 409-419 doi: 10.1007/s11465-013-0275-5
Harmonic drive systems are precise and specific transmission gear systems which are beneficial in terms of the high transmission ratio and almost zero backlash. These inherent and spectacular properties result in using this mechanism in robotic and space sciences where the precision and lightwieght play an important role. This paper presents a vibration analysis of harmonic drive systems using the shell theory. Equations of vibration for the flexspline and the circular spline of the system are derived and used to find the natural frequencies for both parts and, moreover, vibration response of the system under the operating condition is calculated. Also, obtained vibration equations are utilized to study the effects of different involved parameters such as the geometry of the flexspline and its gear tooth, eccentricity, and unbalancing on the vibrational behavior of the system.
关键词: harmonic drive system strain wave gearing mechanism vibration analysis natural frequencies
null
《机械工程前沿(英文)》 2014年 第9卷 第2期 页码 191-202 doi: 10.1007/s11465-014-0293-y
In present study, free vibration of cracked beams resting on two-parameter elastic foundation with elastically restrained ends is considered. Euler-Bernoulli beam hypothesis has been applied and translational and rotational elastic springs in each end considered as support. The crack is modeled as a mass-less rotational spring which divides beam into two segments. After governing the equations of motion, the differential transform method (DTM) has been served to determine dimensionless frequencies and normalized mode shapes. DTM is a semi-analytical approach based on Taylor expansion series that converts differential equations to recursive algebraic equations. The DTM results for the natural frequencies in special cases are in very good agreement with results reported by well-known references. Also, the DTM procedure yields rapid convergence beside high accuracy without any frequency missing. Comprehensive studies to analyze the effects of crack location, crack severity, parameters of elastic foundation and boundary conditions on dimensionless frequencies as well as effects of elastic boundary conditions on cracked beams mode shapes are carried out and some problems handled for first time in this paper. Since this paper deals with general problem, the derived formulation has capability for analyzing free vibration of cracked beam with every boundary condition.
关键词: free vibration cracked beam elastic foundation restrained ends differential transform method
Modeling and analysis of steady-state vibration induced by backlash in servo rotary table
Xiao YANG,Dun LU,Sanli LIU,Jun ZHANG,Wanhua ZHAO
《机械工程前沿(英文)》 2015年 第10卷 第1期 页码 43-47 doi: 10.1007/s11465-015-0327-0
Backlash cannot be always avoided in mechanical systems because of wear or looseness. Steady-state vibration may be induced by backlash in closed loop feed drive systems. This paper presents a mathematical model of a servo rotary table, considering the effect of backlash. The accuracy of this model is verified by an experiment. The influences of the parameters, such as position controller gain, velocity controller gain, load and the magnitude of backlash, on steady-state vibration are discussed. The steady-state vibration amplitude increases with the position controller gain, load and the magnitude of backlash. The steady-state vibration frequency increases with the position controller gain and the velocity controller gain, while an increase in load leads to a decrease in the frequency.
Dynamic analysis of a rig shafting vibration based on finite element
Van Thanh NGO, Danmei XIE, Yangheng XIONG, Hengliang ZHANG, Yi YANG
《机械工程前沿(英文)》 2013年 第8卷 第3期 页码 244-251 doi: 10.1007/s11465-013-0264-8
In recently, finite elements method (FEM) has been used most popular for analysis of stress, vibration, heat flow and many other phenomena. Taking a rig shafting as an example, this paper studies the lateral vibration of the rig shafting with multi-degree-of-freedom by using FEM. The FEM model is created and the eigenvalues and eigenvectors are calculated and analyzed to find natural frequencies, critical speeds, mode shapes and unbalance responses. Then critical and mode shapes are determined. Finally, responses of unbalance force are analyzed in case of undamped and damped system, and peaks of response are compared.
关键词: Finite element method (FEM) lateral vibration rig shafting rotor-bearing system dynamic characteristics
Detection of solder bump defects on a flip chip using vibration analysis
Junchao LIU, Tielin SHI, Qi XIA, Guanglan LIAO
《机械工程前沿(英文)》 2012年 第7卷 第1期 页码 29-37 doi: 10.1007/s11465-012-0314-7
Flip chips are widely used in microelectronics packaging owing to the high demand of integration in IC fabrication. Solder bump defects on flip chips are difficult to detect, because the solder bumps are obscured by the chip and substrate. In this paper a nondestructive detection method combining ultrasonic excitation with vibration analysis is presented for detecting missing solder bumps, which is a typical defect in flip chip packaging. The flip chip analytical model is revised by considering the influence of spring mass on mechanical energy of the system. This revised model is then applied to estimate the flip chip resonance frequencies. We use an integrated signal generator and power amplifier together with an air-coupled ultrasonic transducer to excite the flip chips. The vibrations are measured by a laser scanning vibrometer to detect the resonance frequencies. A sensitivity coefficient is proposed to select the sensitive resonance frequency order for defect detection. Finite element simulation is also implemented for further investigation. The results of analytical computation, experiment, and simulation prove the efficacy of the revised flip chip analytical model and verify the effectiveness of this detection method. Therefore, it may provide a guide for the improvement and innovation of the flip chip on-line inspection systems.
关键词: flip chip defect detection ultrasonic excitation vibration analysis
Zhuchao YE, Huaihai CHEN,
《机械工程前沿(英文)》 2009年 第4卷 第4期 页码 397-400 doi: 10.1007/s11465-009-0044-7
关键词: simply supported beam moving mass (MM) transverse vibration moving finite element (MFE)
标题 作者 时间 类型 操作
Flow, thermal, and vibration analysis using three dimensional finite element analysis for a flux reversal
B. VIDHYA,K. N. SRINIVAS
期刊论文
Conformal analysis of fundamental frequency of vibration of elastic clamped plates
QI Hongyuan, ZHU Hengjun
期刊论文
Application of python-based Abaqus preprocess and postprocess technique in analysis of gearbox vibration
Guilian YI, Yunkang SUI, Jiazheng DU
期刊论文
Numerical analysis of vehicle-bridge coupling vibration concerning nonlinear stress-dependent damping
Pengfei LI; Jinquan ZHANG; Shengqi MEI; Zhenhua DONG; Yan MAO
期刊论文
Vibration analysis of medium and small span bridges subjected to mixed marshalling freight trains
LI Qi, WU Dingjun, HUANG Xiaobin
期刊论文
Vibration analysis of blade-disc coupled structure of compressor
WANG Chunjie, SONG Shunguang, ZONG Xiao
期刊论文
Free vibration analysis of cracked thin plates by quasi-convex coupled isogeometric-meshfree method
Hanjie ZHANG,Junzhao WU,Dongdong WANG
期刊论文
Kinetic energy based model assessment and sensitivity analysis of vortex induced vibration of segmental
Nazim Abdul NARIMAN
期刊论文
Free vibration analysis of laminated FG-CNT reinforced composite beams using finite element method
T. VO-DUY, V. HO-HUU, T. NGUYEN-THOI
期刊论文
Semi-analytical approach for free vibration analysis of cracked beams resting on two-parameter elastic
null
期刊论文
Modeling and analysis of steady-state vibration induced by backlash in servo rotary table
Xiao YANG,Dun LU,Sanli LIU,Jun ZHANG,Wanhua ZHAO
期刊论文
Dynamic analysis of a rig shafting vibration based on finite element
Van Thanh NGO, Danmei XIE, Yangheng XIONG, Hengliang ZHANG, Yi YANG
期刊论文
Detection of solder bump defects on a flip chip using vibration analysis
Junchao LIU, Tielin SHI, Qi XIA, Guanglan LIAO
期刊论文