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10 articles for “external damping”
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Influence of Internal and External Dampings on Shaft Whirl Speeds
Abstract: A mathematical model is developed for the estimation of rotor forward and backward whirl speeds by considering the stationary and rotational dampings. Stationary damping includes external viscous damping in the bearings and rotational damping includes internal viscous and hysteretic damping in the shaft material. The rotors in gas turbines and steam turbines commonly used in military and commercial rotating machines operate at high speeds. These rotors are provided with a …
Published in Trends in Machine design · Vol. 3, Issue 3, 2016 · pp. 1–11 Read article
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Study on Influence of Different Forms of Damping and Operating Temperature on Whirling Speeds of Rotors
Abstract: Accurate prediction of rotor whirl speeds is fundamentally important in the design of rotating machinery. There has been an impressive progress in the study of rotor dynamics in the last decade. The use of finite elements for the simulation of rotor system makes it possible to handle complex problems. Rotating shaft tends to bow out at certain speeds and whirl in a complicated manner. This phenomenon results from various causes …
Published in Trends in Machine design · Vol. 4, Issue 2, 2017 · pp. 41–55 Read article
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Evaluation of dampness effect on some buildings in Ahmadu Bello University, Zaria, Nigeria
Abstract: Dampness is one of the sources of defect in building. Apart from triggering deterioration of the material and textures, it can also affect in harm to the furnishings and content there by allowing the development of fungi. There are many causes of dampness in building some of which include rain penetration which occurs ingress above the ground at the various points in the external envelope of the construction. i.e through …
Published in Journal of Structural Engineering and Management · Vol. 12, Issue 3, 2025 Read article
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Integrative Machine Learning Approaches for Predicting the Rheological Behaviour of Soft Magnetorheological Elastomers
Abstract: Magnetorheological Elastomers (MREs) are advanced composite materials known for their ability to alter mechanical properties under external magnetic fields, making them highly valuable in adaptive damping systems, vibration control, and smart devices. The accurate prediction of rheological behavior in soft MREs remains a significant challenge due to the complex interplay between material composition and magnetic fields. To address this challenge, this study employs a multi-pronged approach that integrates traditional material …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 1083–1096 Read article
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A Review on Magnetorheological Fluids and its Stabilization Techniques
Abstract: AbstractMagnetorheological fluids are fluids which can alter its physical and rheological properties in response to an external magnetic field. They find many applications in shock absorbers, semi-active dampers, clutches, brakes, haptic actuators and devices. The rheological properties of these fluids can be altered using additives in the fluid composition and hence, the limitations due to settling tendency can be reduced to an extent. Hence, a detailed study on stabilization of …
Published in Recent Trends in Fluid Mechanics · Vol. 5, Issue 2, 2018 · pp. 13–22 Read article
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Dynamic Analysis of Reinforced Tall Structural Systems Connected in Series
Abstract: In recent years, there has been a notable surge in the development of multi-tower connected structures. This architectural phenomenon encompasses the creation of interconnected high-rise buildings that feature shared elements like podiums, sky bridges, or other forms of physical connection. These structures are designed to create a cohesive and functional complex that offers a range of amenities and promotes a sense of community. Dynamic analysis of horizontally connected reinforced concrete …
Published in Journal of Polymer & Composites · Vol. 12, Issue 2, 2024 · pp. 224–234 Read article
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Effectiveness of Semi-Active Variable Stiffness Tuned Mass Damper for Seismic Load Using LQR Control
Abstract: In this study, effectiveness of semi-active variable stiffness tuned mass damper in reducing seismic response of 10-story frame structure is evaluated. The variable stiffness device, comprising four spring, having rhombus configuration, adapted from literature is attached to the tuned mass damper. A control algorithm using state space form of governing equation of motion is developed. LQR controller is employed to obtain control force based on displacement and velocity response feedback. …
Published in Recent Trends in Civil Engineering & Technology · Vol. 10, Issue 1, 2020 · pp. 11–11 Read article
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Design and Analysis of Double Wishbone Suspension for Formula Student Car
Abstract: By getting to know the fundamental ideas of suspension systems and mechanical procedure, this project aims to present an insight in to designing the car suspension and its mathematical model with the chassis and make foundation in vector theory was established and applied to the new method so as to work out the positions of all exterior elements relative to the chassis. Again when the geometry and layout of the …
Published in Trends in Machine design · Vol. 8, Issue 2, 2021 · pp. 30–40 Read article
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Performance Characteristics of Magnetorheological Elastomer Vibration Isolator
Abstract: Smart materials have ability to alter significantly its properties under external stimuli, such as stress, temperature, moisture, electric or magnetic fields. In today’s engineering era, various smart materials are being used to have controlled behavior in various applications such as automotive brakes, clutches, etc. Magneto Rheological Elastomer (MRE) is one of them, uprising with very huge potential. In this present work, preparation of MRE has been presented. Various MRE mold, …
Published in Journal of Automobile Engineering and Applications · Vol. 1, Issue 2, 2014 · pp. 1–4 Read article
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Modelling of The Viscoelastic Composite Curved Panel for The Time Domain Analysis Using TTBDF, β1 / β2−Bathe and Newmark Method
Abstract: Viscoelastic materials are extensively used in structures, especially thin-walled structures, for damping. The accurate modelling of the time domain dynamics of the viscoelastic material is essential for appropriately capturing the damping of the viscoelastic material. Various implicit and explicit time integration schemes are available to evaluate time domain response. However, the rightness of the implementation of the time integration scheme to the viscoelastic material model is very essential. In this …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 204–222 Read article