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39 articles for “natural frequency”
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Calculate the natural frequencies with Cracked for Hybrid Unidirectional Composite Plate
Abstract: A mathematical model was built by using ANSYS (2D, 3D) models and MATLAB to represent composite materials. The natural frequencies were calculated for type of composite plates with of boundary conditions clamped from each edge (CCCC). In the vibration analysis, the finite element and MATLAB results showed there was an increase in the first, second and third natural frequencies by increasing the volumetric fraction of the fiber.In the cracked plate, …
Published in International Journal of Composite Materials and Matrices · Vol. 6, Issue 1, 2020 · pp. 5–16 Read article
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Free Vibration Analysis of a Centre-Cracked Plate at Various Orientations through Finite Element Method
Abstract: The free vibration analysis of square centre-cracked plate at various orientations is investigated using the finite element method. In this research, the effect of cracked orientation, variation in cracked length, and variation in thickness of the plate are investigated. Consideration for a variety of edge condition is given through a combination of simply supported, free boundary and clamped boundary condition and determined the mode shapes and natural frequency of a …
Published in International Journal of Composite and Constituent Materials · Vol. 4, Issue 1, 2018 · pp. 5–18 Read article
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Prediction of Circular Frequency of Precast Concrete Piles with Distributed Mass by Resonance Moment–Displacement Approach
Abstract: This paper presents the results of circular natural frequency of single piles from critical buckling load by resonance moment-displacement approach. The support end conditions considered are pinned-pinned, fixed-fixed, and fixed-pinned respectively. It was assumed that resonance moment occurs when the bending moment diagram is made equal to zero at the supports while the resonance displacement is the sum total deflections resulting from the system reduction to an equivalent pinned-pinned system. …
Published in International Journal of Structural Engineering and Analysis · Vol. 6, Issue 2, 2020 · pp. 55–61 Read article
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Vibration Analysis of Sandwich Beams Using 3-Noded Beam Element
Abstract: One-dimensional 3-noded finite element model is developed in this paper for the vibrational analysis of composite sandwich beam for various boundary conditions, using the efficient layer wise zigzag theory. To come across the convergence necessities for the weak integral formulation, fifth power Hermite interpolation is utilized for the transverse displacement and quadratic interpolation is utilized for the axial displacement and shear rotation. Element every node has four degrees of freedom. …
Published in International Journal of Structural Mechanics and Finite Elements · Vol. 2, Issue 2, 2016 · pp. 10–18 Read article
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Application of Three-dimensional Differential Transform Method to Dynamic Vibration Analysis of Rectangular Plate Resting on Elastic Foundation
Abstract: Research on vibration analysis of non-homogenous and varying thickness plate has gained a tremendous increment in recent year due to its vast application in many fields of engineering. This study investigate the dynamic behavior of rectangular plate with varying thickness resting on two-parameter foundation under simply supported free edge condition. The governing differential equation is analyzed using three-dimensional differential transform method. The accuracies of the established solutions are verified by …
Published in International Journal of Structural Mechanics and Finite Elements · Vol. 5, Issue 2, 2019 · pp. 20–35 Read article
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Dynamic Response of Bridges and its Effect on Soil Medium
Abstract: The analysis of dynamic behaviour of bridge structures that are subjected to moving loads has been one of the research benefits in recent years. Specifically in railway bridges, resonance ensues when the load frequency is equal to a multiple of natural frequency of the structure. Resonance vibrations have been practical in railway bridges, especially subjected to high-speed lines. They are caused primarily because of two reasons: one is the repeated …
Published in International Journal of Structural Engineering and Analysis · Vol. 5, Issue 1, 2019 · pp. 28–34 Read article
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Dynamic Analysis of Simply Supported Bridge under Vehicle Loads
Abstract: The analysis of dynamic behavior of bridge structures that are subjected to moving loads has been one of the enquiry interests in recent years. Specifically in railway bridges, reverberation ensues when the load frequency is equal to a multiple of natural frequency of the structure. Resonance vibrations have been practical in railway bridges especially subjected to high-speed lines. They are caused primarily because of two reasons: one is the repeated …
Published in International Journal of Structural Engineering and Analysis · Vol. 5, Issue 1, 2019 · pp. 18–23 Read article
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BASE ISOLATION: EARTHQUAKE RESISTANT CONSTRUCTION TECHNIQUE
Abstract: One of the most effective way of protecting structures against the severe earthquake is the base isolation system. In last few decades base isolation system have gain larger attention as a means in controlling structure failure against seismic hazards. In the base isolation system superstructure is separated from substructure due to which natural frequency of structure gets away from the dominant frequency range of seismic excitation. The effectiveness of an …
Published in International Journal of Structural Engineering and Analysis · Vol. 4, Issue 2, 2018 · pp. 32–37 Read article
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Performance Evaluation and Structural Integrity Assessment of Critical Components in a Glass Vacuum Lifter Using Static-Structural and Modal Analysis
Abstract: Glass handling operations in construction, manufacturing, and industrial sectors require reliable lifting systems to ensure safe transportation while minimizing the risk of damage and improving operator safety. Vacuum lifters have emerged as an effective solution for handling large and fragile glass panels by generating secure holding forces through suction pads. The structural integrity and dynamic performance of critical components, particularly the suction pad and lifter arm, play a vital role …
Published in International Journal of Mechanics and Design · Vol. 12, Issue 2, 2026 · pp. 1–17 Read article
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Effect of Soil-Structure Interaction Effects and Mitigation Strategies for RC Structures - A Review
Abstract: Abstract – Soil-structure interaction (SSI) significantly influences the seismic performance of structures, necessitating advanced modeling and mitigation strategies to address dynamic responses across various structural configurations and soil types. This review synthesizes recent research on SSI effects in reinforced concrete (RC) frames, tall buildings, and subway stations, employing nonlinear finite element modeling, shaking table tests, and probabilistic fragility analyses. Studies highlight that SSI alters natural frequencies, damping, and seismic demands, …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 11, Issue 2, 2025 · pp. 36–42 Read article
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Dynamics Behaviour of Clamped-Clamped Non-Uniform Elastic Beam on Two Parameters Foundation Under Concentrated Moving Load
Abstract: This paper presents a computational study on the dynamic response of a clamped–clamped non-uniform elastic beam supported by a two-parameter foundation and subjected to a concentrated moving load. The analysis incorporates the inertial contribution of the moving load. Unlike uniform models, both the mass per unit length and the moment of inertia of the beam are assumed to vary along the span LLL. The governing equations are solved using the …
Published in International Journal of Mechanics and Design · Vol. 11, Issue 2, 2025 · pp. 1–18 Read article
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Under Water Blasting for Rock Dredging & Protection of Structures: A Case Study
Abstract: Rock dredging in ports involves under water blasting for the pretreatment of hard sea bed. A rock dredging project covering an area of about 257,058m2 involving 400,000 cu.m of hard Khondalite rock mass was taken up in a port in the east coast of Southern India, for deepening of Turning Circle and Inner Harbour Channel. Pre-blast survey was carried out to assess type and condition of various structures standing on …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 2, Issue 1, 2016 · pp. 31–38 Read article
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Study of vibration and dynamic analysis of machine foundation in ansys for deferent geometry
Abstract: The analysis of Machine Foundation involves not only static loads but also the dynamic loads which arecaused due to the working of the machine. Therefore, the machine foundation should survive these loads. Therefore,it becomes vital to reduce the natural frequency of soil beneath the foundation. The object of the project is to preparean explanatory handbook type documentation based on Indian Standards for the analysis and design of frame typemachine foundation …
Published in International Journal of Structural Engineering and Analysis · Vol. 7, Issue 1, 2021 · pp. 24–30 Read article
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An Efficient and Simple Higher Order of Shear Deformation Theory for Static and Free Vibration of Laminated Composite Plates
Abstract: In the present study, the static and free vibration of laminated composite plates is examined by using a refined shear deformation theory and developed for a bending analysis of orthotropic laminated composite plates. These models take into account the parabolic distribution of transverse shear stresses and satisfy the condition of zero shear stresses on the top and bottom surfaces of the plates. The most interesting feature of this theory is …
Published in International Journal of Composite Materials and Matrices · Vol. 2, Issue 1, 2016 · pp. 23–42 Read article
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Free Vibration Analysis of Laminated Composite Plate with Various Boundary Condition Using FEM
Abstract: The vibration analysis of laminated composite plates is analyzed using finite element method. A suitable finite element model is proposed and developed based on first order shear deformation theory using ANSYS parametric design language (APDL) code. The model has been developed using an appropriate eight node isoparametric element (SHELL281) from the ANSYS element library. In this paper Numerical results have been computed for the effect of material properties, thickness ratio …
Published in International Journal of Composite Materials and Matrices · Vol. 2, Issue 1, 2016 · pp. 1–7 Read article
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Dynamic Behavior of Hybrid Unidirectional Without Cracked Composite Plate
Abstract: The composite material is one of the most common materials used in engineering applications due to the wide range of properties, high strength, cheap, easy to manufacture and lightweight. Therefore, many studies and researches have been conducted and are currently being conducted to obtain the appropriate mathematical models that describe the behavior of these materials when exposed to different types of mechanical loads. A mathematical model was built by using …
Published in International Journal of Composite Materials and Matrices · Vol. 6, Issue 1, 2020 · pp. 36–47 Read article
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Particle Swarm Optimization to enhance Low Resolution Images
Abstract: In digital image processing enhancement of low resolution images is always a priority field. Construction of high resolution image from low resolution images by using discrete wavelet transform (DWT) to decompose the input low resolution image into several sub band images. The resolution of surveillance video frames can be improved by interpolation between pixels to generate a moderate enhancement. A hybrid novel method is used to enhance low resolution images …
Published in International Journal of Digital Communication and Analog Signals · Vol. 2, Issue 2, 2016 · pp. 17–21 Read article
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Experimental Test Results on the Effect of Ultrasonic Waves on Defects in Car Bearings: The Effect of Defect Size
Abstract: To check for defects in car bearings, they are identified and measured by sound waves that are affected by the defect. Based on sound, it is called ultrasound technology because it uses high frequencies. High frequencies are the basis of ultrasound. Two features are useful for low-speed cars, which by definition usually have poor signal tolerance. High frequencies are sensitive to the effects of sound waves. In addition, the ultrasound …
Published in International Journal of Structural Mechanics and Finite Elements · Vol. 7, Issue 1, 2021 · pp. 14–21 Read article
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Analysis and Minimization of Limit Cycles in Fuzzy Control Systems
Abstract: ABSTRACTLimit cycles are an important and critical phenomenon commonly found in a class of non-linear control systems. Limit cycles can be observed in different areas of engineering and natural systems. These are frequently found in an aircraft wing fluttering, where the interaction of aerodynamic forces and structural vibrations are present. The design of a control system using fuzzy logic controllers (FLC) are non-linear in nature. The presence of limit cycles …
Published in International Journal of Embedded Systems and Emerging Technologies · Vol. 6, Issue 1, 2020 · pp. 1–10 Read article
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Risk Assessment of Flood for Various Spatial and Temporal Mining Scales Using Flood Vulnerability Index [FVI] – A Case Study of Madhubani Kosi River Flood Affected District in North Bihar, India
Abstract: Several countries experience fatalities, injuries, property damage, economic and social disruption resulting from natural disasters. The natural hazards kill thousands of people and destroy billions of dollars’ worth habitat and property each year. The rapid growth of the world’s population has escalated both the frequency and severity of the natural disasters. Flood disaster has a special place in natural hazards. Floods are the costliest types of natural hazards in the …
Published in International Journal of Digital Communication and Analog Signals · Vol. 1, Issue 2, 2015 · pp. 20–29 Read article