Free Vibration Analysis of Composite Structures Using Semi-Analytical Finite Strip Method

Rostamijavanani, Abdolvahhab; Ebrahimi, Mojtaba; Jahedi, Sina

doi:10.1007/s11668-021-01136-4

Cited by 9 publications

(3 citation statements)

References 23 publications

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“…Because the structure of the upper case is simple, it is easy to adjust the parameters during simulation. According to the results, the frequency and mode shape of the upper case on the chassis can be matched well, indicating that the simulation parameter settings are consistent with the real situation [46,47]. It can be seen from the results that the vibrating position corre- sponding to the low-order natural frequency is the edge of the upper case, while the violent vibrating position corresponding to the high-order natural frequency is the middle part of the upper case.…”

Section: The Upper Casesupporting

confidence: 64%

Vibration signal diagnosis and conditional health monitoring of motor used in biomedical applications using Internet of Things environment

Wang

Dai

Zhang

et al. 2022

The Journal of Engineering

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Vibration, especially basic vibration, may cause loose contacts, open circuits, or other contact problems, which account for a large proportion of system failure causes. Due to the complexity of the chassis structure used in the biomedical motors, the vibration analysis of a single component cannot solve the vibration problems encountered in the work of the system. Therefore, it is necessary to use system simulation and experiments to monitor and enhance the health of the structure. Finite element method is used to carry out the dynamic analysis from the component to the system, and calculate the natural frequency, modal shape and harmonic response. Then, the effectiveness and accuracy of the analysis results are verified by experiments through simulation and experiments. The results show that the measures taken have effectively reduced the vibration of the chassis equipment and improved its safety for better health safety of patients. There is just a 2% variation between the natural frequencies acquired from the experiment and the simulation computation. In terms of natural frequency, the first 6‐order natural frequencies all have errors of less than 10%, and the natural frequency error is comparable to that of fireproof board.

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Section: The Upper Casesupporting

confidence: 64%

Vibration signal diagnosis and conditional health monitoring of motor used in biomedical applications using Internet of Things environment

Wang

Dai

Zhang

et al. 2022

The Journal of Engineering

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“…Besides, the fiber distribution inhomogeneity effects on all values of frequencies. Moreover, Rostamijavanani et al [452] investigated the FV and buckling behaviors of various LC structures such as curved panels, flat plates , and cylindrical shells by implementing a semi-analytical approach to FS method. Besides, the third-order Hermitian shape function and the first-order Lagrange were utilized to estimate the longitudinal and transverse directions.…”

Section: Mixed Solution Without Considering the Sdementioning

confidence: 99%

Computational Linear and Nonlinear Free Vibration Analyses of Micro/Nanoscale Composite Plate-Type Structures With/Without Considering Size Dependency Effect: A Comprehensive Review

Al Mahmoud,

Safaei,

Sahmani

et al. 2024

Arch Computat Methods Eng

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Recently, the mechanical performance of various mechanical, electrical, and civil structures, including static and dynamic analysis, has been widely studied. Due to the neuroma's advanced technology in various engineering fields and applications, developing small-size structures has become highly demanded for several structural geometries. One of the most important is the nano/micro-plate structure. However, the essential nature of highly lightweight material with extraordinary mechanical, electrical, physical, and material characterizations makes researchers more interested in developing composite/laminated-composite-plate structures. To comprehend the dynamical behavior, precisely the linear/nonlinear-free vibrational responses, and to represent the enhancement of several parameters such as nonlocal, geometry, boundary condition parameters, etc., on the free vibrational performance at nano/micro scale size, it is revealed that to employ all various parameters into various mathematical equations and to solve the defined governing equations by analytical, numerical, high order, and mixed solutions. Thus, the presented literature review is considered the first work focused on investigating the linear/nonlinear free vibrational behavior of plates on a small scale and the impact of various parameters on both dimensional/dimensionless natural/fundamental frequency and Eigen-value. The literature is classified based on solution type and with/without considering the size dependency effect. As a key finding, most research in the literature implemented analytical or numerical solutions. The drawback of classical plate theory can be overcome by utilizing and developing the elasticity theories. The nonlocality, weight fraction of porosity, or the reinforcements, and its distribution type of elastic foundation significantly influence the frequencies.

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“…The next step in producing geometry is to meshing it [20], [21], [23]. The mesh generated for the calculations was performed by the Turbo Grid module of the Ansys software [24], [25] (Figure 3).…”

Section: Meshingmentioning

confidence: 99%

Design and Simulation of Radial Flow Turbine Impeller and Investigation Thermodynamic Properties of Flow in LE and TE

Aminjan¹,

Heidari²,

Rahmanivahid³

et al. 2021

TEM Journal

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Centrifugal (radial flow) turbines are widely used in various industries, including power generation industries, so the study on them is of particular importance. The aim of this study was to investigate the thermodynamic properties of fluid flow in Trailing Edge (TE) and (LE) Leading Edge. For this purpose, first, the rotor (impeller) of the radial flow turbine was designed based on some design data such as flow rate, number of blades, rotational speed, diameter and length of the impeller, and then the designed rotor was simulated in 3D. The simulation done in the pressure based method and the turbulence model is SST and the rotational speed was 140,000(RPM). The results showed that the pressure, temperature and enthalpy in TE are less than LE and the areas close to the hub have the highest pressure. Another phenomenon observed is that in the section LE we see the separation of the flow from the blade surface, which then approaches the blade surface again and follows a relatively regular path,so the entropy in TE is greater than LE. At the end, the results of numerical solution were compared with valid data and the error rate and its reasons were discussed.

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Free Vibration Analysis of Composite Structures Using Semi-Analytical Finite Strip Method

Cited by 9 publications

References 23 publications

Vibration signal diagnosis and conditional health monitoring of motor used in biomedical applications using Internet of Things environment

Vibration signal diagnosis and conditional health monitoring of motor used in biomedical applications using Internet of Things environment

Computational Linear and Nonlinear Free Vibration Analyses of Micro/Nanoscale Composite Plate-Type Structures With/Without Considering Size Dependency Effect: A Comprehensive Review

Design and Simulation of Radial Flow Turbine Impeller and Investigation Thermodynamic Properties of Flow in LE and TE

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