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Type of motion in mechanical engineering
In mechanical engineering, random vibration is vibration motion which does not repeat exactly after a certain period of time. It is non-deterministic
Random_vibration
Mechanical oscillations about an equilibrium point
pendulum), or random if the oscillations can only be analysed statistically (e.g. the movement of a tire on a gravel road). Vibration can be desirable:
Vibration
Mechanical device to generate vibrations
machines are capable of producing three different types of vibration profile sine sweep, random vibration, and synthesized shock. In all three of these applications
Vibrator_(mechanical)
Georgian Professor in the Ocean and Mechanical Engineering
in the areas of random vibrations, structural reliability, solid mechanics of composite materials, semi-inverse problems of vibrations and stability, functionally
Isaac_Elishakoff
Vibration fatigue is a mechanical engineering term describing material fatigue, caused by forced vibration of random nature. An excited structure responds
Vibration_fatigue
Stress testing methodology for enhancing product reliability
applying pseudo-random vibration with a suitable profile in relation to frequency. The HALT chamber should be capable of applying random vibration energy from
Highly_accelerated_life_test
Military standard
leakage; acceleration; shock and transport shock; gunfire vibration; and random vibration. The standard describes environmental management and engineering
MIL-STD-810
Formal testing of packaging
weighing 150 lb (68 kg) or Less (Random Vibration) Procedure 1H: Packaged-Products weighing Over 150 lb (68 kg) (Random Vibration) Procedure 2A: Packaged-Products
Package_testing
Structural engineering
(1986). Modeling general hysteresis behaviour and random vibration applications. Journal of Vibration, Acoustics, Stress, and Reliability in Design. 108
Bouc–Wen_model_of_hysteresis
Cooling technique in atomic physics
computing architectures. Laser cooling reduces the random thermal motion of particles or the random vibrations of mechanical systems. For atoms and molecules
Laser_cooling
Indian engineer
loads was the first doctoral thesis in the country in the area of random vibrations.[citation needed] He joined IISc as a faculty member in 1969 and became
Rangachar_Narayana_Iyengar
Dependence of the state of a system on its history
liberté". Acustica (in French). 24: 16–25. Wen, Y. K. (1976). "Method for random vibration of hysteretic systems". Journal of Engineering Mechanics. 102 (2):
Hysteresis
Study and modification of the noise and vibration characteristics of vehicles
Noise, vibration, and harshness (NVH), also known as noise and vibration (N&V), is the study and modification of the noise and vibration characteristics
Noise, vibration, and harshness
Noise,_vibration,_and_harshness
British singer-songwriter (born 1963)
Cauldron of Random Notes. On 17 June 2025, she mentioned that the first single, "Vibration of Life" would be released on 20 June 2025. "Vibration of Life"
Tasmin_Archer
Process forming a path from many random steps
the vibrational density of states, diffusion reactions processes and spread of populations in ecology. The information rate of a Gaussian random walk
Random_walk
United States defense standard
for glass-frit-sealed packages 2025.4 Adhesion of lead finish 2026 Random vibration 2027.2 Substrate attach strength 2028.4 Pin grid package destructive
MIL-STD-883
Metal housing which protects a temperature sensor immersed in a fluid
Synchronized Vibration of a Circular Cylinder in Cross Flow", JSME Series B, 44(4), pp. 729–737 Rice, S. O. (1944), "Mathematical Analysis of Random Noise"
Thermowell
Nonconstructive method for mathematical proofs
Probabilistic Methods in the Theory of Structures: Random Strength of Materials, Random Vibration, and Buckling, World Scientific, Singapore, ISBN 978-981-3149-84-7
Probabilistic_method
Material made from a combination of two or more unlike substances
Jacob; Cederbaum, Gabriel; Elishakoff, Isaac; Librescu, Liviu (1992). Random Vibration and Reliability of Composite Structures. CRC Press. ISBN 978-0-87762-865-1
Composite_material
Quasiparticle of mechanical vibrations
some liquids. In the context of optically trapped objects, the quantized vibration mode can be defined as phonons as long as the modal wavelength of the
Phonon
prolific author of texts in solid mechanics, numerical methods, and random vibration. His mentor at MIT was J. P. Den Hartog. He was awarded the American
Stephen_H._Crandall
Random temperature-influenced deviations of particles from their average state
degrees of freedom of a system: There can be random vibrations (phonons), random rotations (rotons), random electronic excitations, and so forth. Thermodynamic
Thermal_fluctuations
Romanian-Israeli-American scientist, Holocaust survivor
OCLC 62363828. Cederbaum, G.; Elishakoff, I; Aboudi, J.; Librescu, L. (1992). Random Vibrations and Reliability of Composite Structures. Lancaster-Basel: Technomic
Liviu_Librescu
Covariance and correlation
ISBN 978-0-521-86470-1. Newland, D. E. (1993). An introduction to random vibrations, spectral and wavelet analysis (3rd ed.). Wiley. ISBN 978-0-582-21584-9
Cross-correlation
Proportionality constant in some physical laws
number of vacancy defects (i.e. empty sites on the lattice) due to the random vibrations of atoms on the lattice, an atom neighbouring a vacancy can spontaneously
Mass_diffusivity
Four stage, solid fuel launch vehicle
holder in the frangible rail slumping due to launch acceleration and random vibration, or a failure of the frangible rail system due to it operating outside
Minotaur-C
Degradation of solder due to deformation under cyclic loading
depend on the input excitation for both harmonic and random vibration. Steinberg developed a vibration model to predict time to failure based on the calculated
Solder_fatigue
Discipline within engineering design
Probabilistic Methods in the Theory of Structures: Random Strength of Materials, Random Vibration, and Buckling, World Scientific, Singapore, ISBN 978-981-3149-84-7
Probabilistic_design
Railcar – Rail gauge – Railroad car – Railroad switch – Rail tracks – Random vibration – Reaction kinetics – Rear wheel drive – Refrigeration – Reliability
Glossary of mechanical engineering
Glossary_of_mechanical_engineering
Relative importance of certain frequencies in a composite signal
(in seconds) will have PSD with the unit m2/Hz. In the analysis of random vibrations, the unit g02⋅Hz−1 may be used for the PSD of acceleration, where
Spectral_density
American mathematician
His PhD dissertation, supervised by Marc Kac, was titled On the Random Vibrations of Harmonically Bound Particles in a Viscous Medium. Schaum's Outline
Murray_R._Spiegel
Measurement instrument
are available. Vibration data is often most useful in power spectral density format which can be used in to control random vibration testing in a laboratory
Shock and vibration data logger
Shock_and_vibration_data_logger
Mechanical vibration
The balancing of rotating bodies is the process of minimizing vibration. Heavy industrial machines such as gas turbines and electric generators can cause
Balancing_of_rotating_masses
Selection of data points in statistics
determine if a production lot of material meets the governing specifications. Random sampling by using lots is an old idea, mentioned several times in the Bible
Sampling_(statistics)
Type of mechanotherapy
Whole body vibration (WBV) is a generic term used when vibrations (mechanical oscillations) of any frequency are transferred to the human body. Humans
Whole-body_vibration
Particle detector on the International Space Station
assembly by May 2025, CERN teams started metrology, vibroacoustic and random-vibration tests, in collaboration with INFN laboratories in Italy, to validate
Alpha_Magnetic_Spectrometer
Generic name for a relatively persistent vibration of the ground
disciplines, seismic noise is a generic name for a relatively persistent vibration of the ground, due to a multitude of causes, that is often a non-interpretable
Seismic_noise
Device designed to reduce vibrations in structures
by harmonic vibration. They use a comparatively lightweight component to reduce the vibration of a system so that its worst-case vibrations are less intense
Tuned_mass_damper
ISBN 978-2-7298-2805-9. Tustin, Wayne; Mercado, Robert (1 August 1984). Random vibration in perspective. Tustin Institute of Technology. ISBN 978-0-918247-00-1
Diffuse field acoustic testing
Diffuse_field_acoustic_testing
(1973). "First-excursion probability in non-stationary random vibration". Journal of Sound and Vibration. 27 (2): 165–182. doi:10.1016/0022-460X(73)90059-X
Excursion_probability
Interactions among inertial, elastic, and aerodynamic forces
It is caused by a sudden impulse of load increasing. It is a random forced vibration. Generally it affects the tail unit of the aircraft structure due
Aeroelasticity
Random motion of particles suspended in a fluid
Brownian motion is the random motion of particles suspended in a medium (a liquid or a gas). The traditional mathematical formulation of Brownian motion
Brownian_motion
Berthing mechanism used to connect ISS modules
qualified by component-level tests that included ambient functional, random vibration, thermal vacuum, and, for the bolt, thermal cycle. Load tests at the
Common_Berthing_Mechanism
Type of hardware test
(shock, vibration, temperature, altitude, humidity, etc.) that simulate those encountered over the operational life of the component. Random vibration and
Environmental stress screening
Environmental_stress_screening
2024 American satellite
exposure to the low Earth orbit environment. After completion of a random vibration and sine sweep test, Big Red Sat-1 was integrated into the Nanoracks
Big_Red_Sat-1
Tribological systems for spacecraft applications
launch and in orbit. In particular, critical tribosystem inputs are: random vibrations and acoustic noise during launch, leading to high transient loads
Space_tribology
Alternate scientific theory of scent perception
The vibration theory of smell proposes that a molecule's smell character is due to its vibrational frequency in the infrared range. This controversial
Vibration_theory_of_olfaction
Audible vibration that travels via pressure waves in matter
kind of propagating mechanical disturbance—i.e., a wave—rather than as a vibration. Such sources typically describe sound as a perturbation in mechanical
Sound
Device to deploy CubeSats into orbit from the International Space Station
development tests for: the door release, the CSD/CubeSat Deployment test, random vibration test, and temperature cycling. CubeSat integration begins with unpacking
Nanoracks_CubeSat_Deployer
Icelandic-Canadian astronaut (1945–2022)
University, teaching graduate courses on structural dynamics and random vibrations. Tryggvason had about 4,000 hours of flight experience, held an Airline
Bjarni_Tryggvason
Types of noise
by high-velocity jets and turbulent eddies Noise and vibration on maritime vessels Noise, vibration, and harshness, quality criteria for vehicles Traffic
Noise_(spectral_phenomenon)
American rock band
an official member. Released in 1966, the Pet Sounds album and "Good Vibrations" single became widely regarded as among the greatest and most influential
The_Beach_Boys
Pseudoscientific attempts to locate underground objects
oil, claimed radiations (radiesthesia), gravesites, or malign "earth vibrations". It is also known as divining (especially in water divining), doodlebugging
Dowsing
(SAMCEF Repdyn), Buckling stability (SAMCEF Stabi) and response to random vibrations (SAMCEF Spectral) SAMCEF Mecano - Non Linear static and dynamic analysis
SAMCEF
Iranian engineer and university administrator
interests are in the areas of structural reliability, risk analysis, random vibrations and earthquake engineering. He has pioneered methods for the safety
Armen_Der_Kiureghian
Probability theory
statistics, an inverse distribution is the distribution of the reciprocal of a random variable. Inverse distributions arise in particular in the Bayesian context
Inverse_distribution
Soldering defect
and joint fracture Random Vibration: Induces fatigue cracking; orientation-sensitive Combined Environment: Thermal shock + vibration accelerates failure
Insufficient_solder
Measure of temperature relative to absolute zero
sample; the only remaining particle motion being that comprising random vibrations due to zero-point energy. Temperature scales are numerical. The numerical
Thermodynamic_temperature
Pseudoscientific alternative medicine
than any unified terminology, leading to terms such as energy healing, vibrational medicine, and similar terms being used synonymously. Practitioners may
Energy_medicine
Ring or edge strip inserted into a hole through thin material
transmission of vibration. They were widely used for mounting shock-sensitive computer disk drives, particularly in equipment subject to vibration or jarring
Grommet
Packing method for objects
in vibrational packing.Granular Matter, 21(2), 26 Blumenfeld, Raphael (2021-09-09). "Disorder Criterion and Explicit Solution for the Disc Random Packing
Random_close_pack
Failed suspension bridge in Washington, US
by self-induced vibrations in the structure Eddy formations that might be periodic Random effects of turbulence, that is the random fluctuations in velocity
Tacoma_Narrows_Bridge_(1940)
ambient vibration test the subject structure can be under a variety of excitation sources which are not measured but are assumed to be 'broadband random'. The
Operational_modal_analysis
1993 studio album by Stereolab
Savers", from their 1967 album Kaleidoscopic Vibrations: Electronic Pop Music from Way Out. Transient Random-Noise Bursts was released on 10 August 1993
Transient Random-Noise Bursts with Announcements
Transient_Random-Noise_Bursts_with_Announcements
Vibration analysis of rotating machinery
Condition-based maintenance of rotating machinery by vibration analysis is an industrial and research field focused on maintaining complex rotating equipment
Condition-based maintenance of rotating machinery by vibration analysis
Condition-based_maintenance_of_rotating_machinery_by_vibration_analysis
Modulation technique for mitigating EMI of power converters
significant magnitude, which leads to mechanical vibration, noise, and EMI. However, by applying randomness to the conventional PWM scheme, the harmonic power
Random_pulse-width_modulation
Unwanted sound
there is no distinction between noise and desired sound, as both are vibrations through a medium, such as air or water. The difference arises when the
Noise
signals are available for modal testing, but the sine sweep and random frequency vibration profiles are the most common. Small objects or structures are
Modal_testing
Device that converts energy from one form to another
signal) Tactile transducers – convert electrical signal into vibration (electrical signal → vibration) Thermophones – convert electrical signals into temperature
Transducer
Varying physical quantity that conveys information
signals can be generated using a gyroscope. Sound. Since a sound is a vibration of a medium (such as air), a sound signal associates a pressure value
Signal
micrometre or so). ESPI can be used for stress and strain measurement, vibration mode analysis and nondestructive testing. ESPI is similar to holographic
Electronic speckle pattern interferometry
Electronic_speckle_pattern_interferometry
Italian nuclear engineer and theoretical physicist
Bijker, R; Frank, A. (2002). "Regular spectra in the vibron model with random vibrations". Phys. Rev. C. 65 (4) 044316. arXiv:nucl-th/0201080. Bibcode:2002PhRvC
Francesco_Iachello
Noise that reduces quantization error
Dither or dithering is an intentionally applied form of noise used to randomize quantization error, preventing large-scale patterns such as color banding
Dither
Computer hardware technology that uses quantum mechanics
other sources also exist. Examples include the quantum gates, the lattice vibrations, and the background thermonuclear spin of the physical system that implements
Quantum_computing
Concept in optics
the plane containing the vibrations and the direction of propagation. That plane, which became known as the plane of vibration, is perpendicular to Fresnel's
Plane_of_polarization
Brand of wand vibrator
requires 120 volts. It does not take batteries. The massager provides two vibration rates—nominally 5,000 and 6,000 rpm, equivalent to 83 Hz and 100 Hz—that
Hitachi_Magic_Wand
Theory of the mechanism of hearing
fire in time with the vibrations, the neurons would not fire on every vibration. The number of skipped vibrations was seemingly random. The gaps in the resulting
Temporal_theory_(hearing)
Standard for testing electrotechnical products
Z/ABDM:Climatic sequence IEC 60068-2-64 - Test Fh: Vibration, broadband random and guidance IEC 60068-2-65 - Test Fg: Vibration - Acoustically induced method IEC 60068-2-66
IEC_60068
How well a vehicle copes with uneven surfaces
Giulio (2018). "On the vibration analysis of off-road vehicles: Influence of terrain deformation and irregularity". Journal of Vibration and Control. 24 (22):
Ride_quality
Video game cartridge
keep track of time even when the device was off or a Rumble Pak to add vibration feedback to enhance gameplay. Game Paks for the Game Boy Advance, which
Game_Boy_Game_Pak
Method for reducing unwanted sound
employing active vibration control. This approach is appropriate when the vibration of a structure produces unwanted noise by coupling the vibration into the
Active_noise_control
Season of television series
knock him into the roof with everybody in the Skull Dome noticing the vibrations, astounding Big Mom and the Worst Generation. Luffy attempts to land one
One_Piece_season_20
Movement in granular material
convection is a phenomenon where granular material subjected to shaking or vibration will exhibit circulation patterns similar to types of fluid convection
Granular_convection
Spectroscopic technique
V. Raman) is a spectroscopic technique typically used to determine vibrational modes of molecules, although rotational and other low-frequency modes
Raman_spectroscopy
(1938). "On Vibration Properties of Electron Gas". J. Exp. Theor. Phys. (in Russian). 8 (3): 291. A. A. Vlasov (1968). "The Vibrational Properties of
Timeline_of_thermodynamics
mode shapes, etc.) of a constructed structure using only its (output) vibration response (e.g., velocity, acceleration) measured under operating conditions
Bayesian operational modal analysis
Bayesian_operational_modal_analysis
analysis (SEA) is a method for predicting the transmission of sound and vibration through complex structural acoustic systems. The method is particularly
Statistical_energy_analysis
"Transitioning Away from Stochastic Process Models" (Journal of Sound and Vibration, Vol. 565). In 2025, he published "A Radically Different Method of Moments"
William_A._Gardner
triaxial mode, it can simulate a variety of vibration environments including earthquakes and random vibrations, as well as log-sweep and resonant searches
Triaxial Earthquake and Shock Simulator
Triaxial_Earthquake_and_Shock_Simulator
Chemical compound
pressure gauges to damp vibration. External vibrations, from compressors, engines, pumps, etc., produce harmonic vibrations within Bourdon gauges that
Glycerol
American writer, clubwoman (1847–1929)
Lessons in Number Vibration (1911); The day of wisdom according to number vibration (1917); and The Balliett Philosophy of Number Vibration in Questions and
Mrs._L._Dow_Balliett
Number of occurrences or cycles per unit time
specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio signals (sound), radio waves, and light. The interval of time between
Frequency
Medical condition in which spasm of arteries causes episodes of reduced blood flow
disorder such as scleroderma or lupus, injuries to the hands, prolonged vibration, smoking, thyroid problems, and certain medications, such as birth control
Raynaud_syndrome
Animatronic chimpanzee robot
eyes, touch sensors on the chin, top and rear of the head and sound and vibration sensors in the ear. There is also an Alive Elvis manufactured. In attempting
WowWee_Alive_Chimpanzee
Electronic testing device
available. A vibration spectrum analyzer allows to analyze vibration amplitudes at various component frequencies, In this way, vibration occurring at
Spectrum_analyzer
Inelastic scattering of photons by matter
and a change in the light's direction. Typically this effect involves vibrational energy being gained by a molecule as incident photons from a visible
Raman_scattering
1969 studio album by Don Cherry
Cherry. "Brilliant Action" – 8:50 "Omejelo" – 7:25 "Total Vibration (Part 1)" – 3:00 "Total Vibration (Part 2)" – 6:00 "Sun of the East" – 7:30 "Terrestrial
Mu_(album)
Electric charge generated in certain solids due to mechanical stress
reduce vibrations in materials by attaching piezo elements to the material. When the material is bent by a vibration in one direction, the vibration-reduction
Piezoelectricity
Effect of variables' uncertainties on the uncertainty of a function based on them
theory of rank-one stochastic dynamic systems". Journal of Sound and Vibration. 332 (11): 2750–2776. Bibcode:2013JSV...332.2750L. doi:10.1016/j.jsv.2012
Propagation_of_uncertainty
Jamaican reggae musician (1945–1981)
was followed by his breakthrough album in the United States, Rastaman Vibration (1976), which reached the Top 50 of the Billboard Soul Charts. A few months
Bob_Marley
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