vibration severity Articles

  • Hart`s E&P: Smart drillpipe technologies for the driller’s toolbox

    Advances in technology boost successful development of new LWD and drilling technology offshore the Norwegian Continental Shelf. Wired drillpipe (WDP) technology was implemented on a multiple-well project located offshore the Norwegian Continental Shelf. The operator’s main objective was to drill each well as cost-effectively as possible while making sure that the wellbore placement ...


    By Baker Hughes

  • Adoption hurdles and challenges with small wind turbines

    Adoption Hurdles and Challenges with Small Wind Turbines Wind energy is very promising. It can be harvested without any costs, and like solar panels, wind turbines are environmentally-friendly. However, such machines are not living up to their potential. Some users have reported low efficiency rates, unpredictable performance and costly adoption barriers. ...


    By Larson Electronics LLC

  • Oil Sampling Best Practices (Part 2)

    Understanding Dynamic Particle Equilibrium in Closed Loop Systems Dynamic Equilibrium Condition (DEC) is defined as a steady state condition where the normal wear rate in a machine results in no net gain or loss of particles. ...


    By Spectro Scientific

  • Opening the envelope on bearing vibration

    A sophisticated signal processing technique can help to pinpoint bearing failure at an early stage. Chris Hansford, Managing Director at Hansford Sensors, explains. Experienced operators can often tell if a machine is not working properly, on the basis that is does not ‘sound right’. The same principle can be applied – using modern electronics – to identify the exact cause ...


    By Hansford Sensors

  • Vibrating feeders for stockpiling and reclaim

    The expanding applications of vibratory feeders for controlling the flow of bulk materials, and their adaptation for processing requirements, have developed considerable interest in stockpiling and reclaim systems. The general design of these units consists of a material transporting trough, or platform, driven by a vibratory force system. The flexibility and variety of designs is limited only by ...


    By General Kinematics

  • Ensuring satellite reliability with vibration testing

    They offer space test and ground-based facilities where they design and build instruments, and analyse and process data. They also operate ground-station facilities, and lead conceptual studies for future missions. Working with space and ground-based groups around the world, they are now the largest space science department in Europe, and have been involved in over 150 missions in recent years, ...

  • A Device for the Measurement of Sub-Surface Ground Vibrations

    A reliable measurement of free-field stress waves from transient loading has several important applications, for example, in the design of effective wave barriers to protect sensitive equipment and in the design of underground protective structures against explosive loading, to name a few. The characteristics of a stress wave are highly dependent on the energy source and the soil medium through ...


    By ASTM International

  • Rectangular Vibrating Screen Separators: Uses and Applications

    Vibratory screeners come in a wide range of sizes and configurations to support a diverse set of applications. Choosing the right machine for your purposes can be a daunting task — particularly if you’re upgrading older equipment that has been used for years. Technology has changed considerably, and there’s a good chance what was best for ...


    By VibraScreener Inc.

  • Bearing fault severity estimation using time–based descriptors for rotating electric machines

    This paper evaluates the bearing fault severity in rotating electric machines based on the time–based descriptors derived from machine vibration signal. Time–based descriptors are independent of bearing dimensions and machine dynamics. To establish the relationship between the time–based descriptor and bearing fault severity, a wide range of defective bearings are examined on an experimental ...


    By Inderscience Publishers

  • Random vibration Monte Carlo simulation using multiple harmonic function schemes

    The reliability study of structures under random vibration involves the performance of Monte Carlo simulation in time domain. One important part of such analyses is the generation of load time histories that must accurately represent the characteristics of the stochastic loads. There are several methods to generate time histories from a power spectral density (PSD) function. One common approach ...


    By Inderscience Publishers

  • Vibration-based approach to lifetime prediction of electric motors for reuse

    This paper is concerned with lifetime prediction of components in washing machines. Vibration signals were measured on electric motors during an accelerated lifetime test ranging from 26.7 to 38.5 simulated years. Loose bearings have initiated air-gap eccentricity and rotor-to-stator rubbing, which resulted in a motor breakdown. Significant frequency bands were identified using a spectral ...


    By Inderscience Publishers

  • What Are the Benefits of Using a Mechanical Vibrating Separator for Bulk Solids?

    Mechanical vibrating separators are one of three main types of industrial screening machines, along with rectangular and circular screeners. While mechanical separators are generally considered to be at the lower end of the technological spectrum, they offer several advantages over other types of machines in certain bulk solid screening applications. Advantage #1: Cost With their ...


    By VibraScreener Inc.

  • Performance of damage detection algorithms for health monitoring of joints in steel frame structures using vibration–based techniques

    Steel frame structures are widely used for industrial buildings, bridges, off–shore structures, etc., due to their high reliability and less construction time. In these types of structures, beams and columns are often connected by welding or fasteners forming rigid joints. In this study, viability of several damage detection algorithms for health monitoring of joints in planar frame structures ...


    By Inderscience Publishers

  • Analysis of quarry-blast-induced ground vibrations to mitigate their adverse effects on nearby structures

    The Peak Particle Velocities (PPVs) were measured at several station points in the vicinity of a limestone quarry in Turkey, and a Scaled Distance (SD) value for each individual blast was calculated. A linear regression analysis was performed and results were plotted. An attenuation equation unique for the limestone quarry was statistically derived from the plotted graph, with an acceptable ...


    By Inderscience Publishers

  • Evaluation of various through the thickness and curvature approximations in free vibration analysis of cylindrical composites shells

    This paper presents a comparison of various, significant shell theories to evaluate the free vibration response of multi-layered, orthotropic cylindrical shells. Carrera unified formulation for the modelling of composite spherical shell structures is adopted. Via this approach, higher order, zig-zag, layer-wise and mixed theories can be easily formulated. As a particular case, the equations ...


    By Inderscience Publishers

  • Evaluation of various theories of the thickness and curvature approximations for free vibrational analysis of cylindrical and spherical shells

    Cylindrical and spherical shells are largely used in several engineering fields, especially in aerospace vehicles as structural elements and in automotive vehicles as shafts or exhaust and induction systems. Due to their particular relations with vibrations of automotive structures, this work compares various significant shell theories to evaluate the free vibration response. Thin shell theories ...


    By Inderscience Publishers

  • Vibration – What is It? How does it Affect My Operation? What can I Do About It?

    ABSTRACTThis paper describes how pump vibration can create problems in conveyance systems. Potential sources of vibration are reviewed as well as factors that affect pump vibration. Examples are presented that demonstrate pump vibration problems: (1) when a wet well level was lowered to obtain system storage capacity, (2) in a new installation, and (3) when one pump in an installation functioned ...

  • VSEP treats well and surface water to provide ultra clean drinking water

    New Logic Research manufactures a proprietary vibrating membrane filtration system that is uniquely suited for treatment of commercial and domestic drinking water. The use of a vibrating membrane mechanism to avoid membrane fouling is new and is just the kind of improvement needed to make the use of membrane filtration an effective and economical treatment solution for drinking water. New Logic ...


    By New Logic Research, Inc.

  • Minimum and Maximum Densities of Granular Materials

    Laboratory tests were conducted to determine minimum and maximum densities of arroyo sand, concrete sand, Ottawa sand, and glass beads. Minimum densities were determined by six different methods using two different molds. Maximum density tests were performed using an electromagnetic vibrator producing vertical simple harmonic motion. The vibration parameters investigated were frequency, ...


    By ASTM International

  • Numerical prediction of damping in structures with frictional joints

    In many vehicle and space structures, friction in bolted joints is the primary source of energy dissipation during vibrations. Several simplified finite element models have proven their capacity to describe the energy dissipation owing to micro-slip in joints. However, these simplified models require extensive physical testing in order to extract model parameters. This paper proposes a ...


    By Inderscience Publishers

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