# vibration (blogs) — RSS Amplifier Recent posts from the 7 feeds in the RSS Amplifier directory that cover vibration. Page: Feed: --- ## [Aircraft Landing Gear Dynamic Analysis](https://blog.vibrationdata.com/2026/08/21/aircraft-landing-gear-dynamic-analysis/) _2026-08-21 · Tom Irvine · Vibrationdata Engineering Blog_ A landing gear is the only structure on the airplane that is designed to be hit. Everything else is sized to carry loads that arrive smoothly. The gear is sized to absorb a defined amount of kinetic energy in a fraction of a second, several times a day, for tens of thousands of cycles, while ... Read more ## [NASTRAN FRF & Modal Transient Analysis](https://blog.vibrationdata.com/2026/08/21/nastran-frf-modal-transient-analysis/) _2026-08-21 · Tom Irvine · Vibrationdata Engineering Blog_ SOL 111 or SOL 112? Why a Synthesized Time History Earns Its Keep A base input power spectral density arrives on a specification sheet, and the reflex is automatic. Build the model, run SOL 111, read the RMS stress, apply a three-sigma factor, and compare against allowable. The whole exercise takes an afternoon on a ... Read more ## [Flows From Above](https://fuckyeahfluiddynamics.tumblr.com/post/825573344509345792) _2026-08-21 · FYFD_ Our planet is constantly carved by the flow of wind, water, and ice. These images, all shortlisted by the International Aerial Photographer of the Year competition, highlight those forces . (Image credit: Various Artists/IAPOTY , see images for details; via Colossal ) ## [Flows From Above](https://fyfluiddynamics.com/2026/08/flows-from-above/) _2026-08-21 · Nicole Sharp · FYFD_ Our planet is constantly carved by the flow of wind, water, and ice. These images, all shortlisted by the International Aerial Photographer of the Year competition, highlight those forces. From meandering rivers and spreading deltas to cracked valleys and windswept dunes, flow is all around us. (Image credit: Various Artists/IAPOTY, see images for details; via \[…\] ## [Representing Rain's Microphysics](https://fuckyeahfluiddynamics.tumblr.com/post/825482753538670592) _2026-08-20 · FYFD_ Realistically modeling rainfall remains an extremely difficult problem. To be practical, results have to be on the scale of kilometers; no one is looking to find out whether rain will fall from one specific cloud over their head. But making that prediction depends on physics that happens at the microscale, where droplets tens of microns in size are condensing, colliding, and eventually growing… ## [How Strings Vibrate](https://fuckyeahfluiddynamics.tumblr.com/post/825482745397608448) _2026-08-20 · FYFD_ Many of us have a mental image of strings vibrating like a swinging jump rope, but that's not quite what you actually see. Instead, plucked strings often look strangely triangular, as Henry explains in this Minute Physics video . (Video and image credit: Minute Physics) ## [Representing Rain’s Microphysics](https://fyfluiddynamics.com/2026/08/representing-rains-microphysics/) _2026-08-20 · Nicole Sharp · FYFD_ Realistically modeling rainfall remains an extremely difficult problem. To be practical, results have to be on the scale of kilometers; no one is looking to find out whether rain will fall from one specific cloud over their head. But making that prediction depends on physics that happens at the microscale, where droplets tens of microns \[…\] ## [How Strings Vibrate](https://fyfluiddynamics.com/2026/08/how-strings-vibrate/) _2026-08-19 · Nicole Sharp · FYFD_ Many of us have a mental image of strings vibrating like a swinging jump rope, but that’s not quite what you actually see. Instead, plucked strings often look strangely triangular, as Henry explains in this Minute Physics video. This more complicated shape comes from the way the string’s tension responds to the applied force of \[…\] ## [Stripping Mars' Atmosphere](https://fuckyeahfluiddynamics.tumblr.com/post/825301557655568384) _2026-08-18 · FYFD_ Unlike Earth, Mars lacks a strong global magnetic field, which allows the solar wind to strip its atmosphere, but the exact mechanisms of that process have been unclear. But a new study has caught the process in action . (Image credit: Mars - NASA, illustration - C. Zhang et al. ; research credit: C. Zhang et al. ; via Gizmodo ) ## [Stripping Mars’ Atmosphere](https://fyfluiddynamics.com/2026/08/stripping-mars-atmosphere/) _2026-08-18 · Nicole Sharp · FYFD_ Mars was once a warmer, wetter place, swathed in a thick and protective atmosphere. Unlike Earth, Mars lacks a strong global magnetic field, which allows the solar wind to strip its atmosphere, but the exact mechanisms of that process have been unclear. But a new study has caught the process in action. By combining simultaneous \[…\] ## [Meet Claude, an AI assistant (Sponsored)](https://crawlproof.com/a/sBSJ0uX84dmD) _2026-08-18 · **Sponsored**_ Chat with Claude at claude.ai — a conversational AI assistant. ## [Spring Surge](https://blog.vibrationdata.com/2026/08/18/spring-surge/) _2026-08-18 · Tom Irvine · Vibrationdata Engineering Blog_ Every introductory vibration course begins by drawing a mass on a spring and declaring that the spring has stiffness but no mass. That assumption is the reason the single-degree-of-freedom system has exactly one natural frequency instead of infinitely many. It is an excellent assumption almost all of the time. It fails in a specific and ... Read more ## [An Iceberg Flips](https://fuckyeahfluiddynamics.tumblr.com/post/825210953352298496) _2026-08-17 · FYFD_ Footage of a massive iceberg flipping in Greenland has gone viral. Icebergs shift like this because they melt unevenly, with submerged areas melting faster. (Video and image credit: AfarTV; via Colossal ) ## [An Iceberg Flips](https://fyfluiddynamics.com/2026/08/an-iceberg-flips/) _2026-08-17 · Nicole Sharp · FYFD_ Footage of a massive iceberg flipping in Greenland has gone viral. The feat took place off the coast of Ilulissat and was caught on a nearby livestream camera. Icebergs shift like this because they melt unevenly, with submerged areas melting faster. As the underwater shape of the iceberg changes, the buoyant forces shift relative to \[…\] ## [The Round House on Highway 101](https://blog.vibrationdata.com/2026/08/14/the-round-house-on-highway-101/) _2026-08-14 · Tom Irvine · Vibrationdata Engineering Blog_ The Wall Street Journal ran a piece this week on a circular house in Novato, California, listed for sale for the first time since it was built. Sam Harkleroad put it up in 1963: 1,560 square feet of floor area, roughly 50 feet in diameter, cantilevered off a single cylindrical core, and designed to rotate ... Read more ## [Flex Pen and Ink](https://fuckyeahfluiddynamics.tumblr.com/post/824939154199740416) _2026-08-14 · FYFD_ It’s no secret that I’m a fan of fountain pens. They’re just one way I like to have little celebrations of fluid physics in my everyday life . (Video and image credit: Flexperiments) ## [Flex Pen and Ink](https://fyfluiddynamics.com/2026/08/flex-pen-and-ink/) _2026-08-14 · Nicole Sharp · FYFD_ It s no secret that I m a fan of fountain pens. They re just one way I like to have little celebrations of fluid physics in my everyday life. That said, I don t typically use anything with a monster flex nib like what you see here. This is extra. But it s also an incredibly cool glimpse of \[ \] ## [Post 31: Site Update: Fences, Footings, and That Dewatering Reality Check](https://www.constructor.net.au/post-31-site-update-fences-footings-and-that-dewatering-reality-check/) _2026-08-13 · Anthony Painter · Constructor_ This update covers the boundary fence, why we had to redesign the footing, and the reason we can't pull the dewatering system out as early as we hoped (even though it hasn't yet been installed). ## [Capillary Slinkies](https://fuckyeahfluiddynamics.tumblr.com/post/824848588628721664) _2026-08-13 · FYFD_ Nature is full of helical fibers, including in plants and bird feathers. In this study, researchers explore how these soft springs react to droplets . (Image and research credit: B. Bhatt and A. Carlson ) ## [Capillary Slinkies](https://fyfluiddynamics.com/2026/08/capillary-slinkies/) _2026-08-13 · Nicole Sharp · FYFD_ Nature is full of helical fibers, including in plants and bird feathers. In this study, researchers explore how these soft springs react to droplets. When the pitch of the spring (roughly speaking, the spacing between coils) is small, droplets can flow down in a plug (not shown). But as the pitch increases, droplets can take \[ \] ## [Post 30: Sheet Piling Done Right: Lessons on Vibration, Pre-Drilling, and Neighbours](https://www.constructor.net.au/post-30-sheet-piling-done-right-lessons-on-vibration-pre-drilling-and-neighbours/) _2026-08-13 · Anthony Painter · Constructor_ Sheet piling can be noisy and disruptive, but it doesn't have to be a pain for you or your neighbours. In this post we break down how we managed vibration, saved money, and kept the peace, all while dealing with a high water table building site. ## [Marketplace for AI-Powered Professionals (Sponsored)](https://crawlproof.com/a/AhaSj2HxrLDr) _2026-08-13 · **Sponsored**_ Find professionals who use ChatGPT, Copilot, and Claude to deliver work faster. ## [Levitating By Squeeze Film](https://fuckyeahfluiddynamics.tumblr.com/post/824757984006635520) _2026-08-12 · FYFD_ We’ve seen a few different kinds of levitation here over the years, including via acoustic waves, aerodynamics, and Leidenfrost effect. Here, Steve Mould describes something a bit different: a levitation squeeze film driven by ultrasonic transducers . (Video and image credit: S. Mould) ## [Levitating By Squeeze Film](https://fyfluiddynamics.com/2026/08/levitating-by-squeeze-film/) _2026-08-12 · Nicole Sharp · FYFD_ We ve seen a few different kinds of levitation here over the years, including via acoustic waves, aerodynamics, and Leidenfrost effect. Here, Steve Mould describes something a bit different: a levitation squeeze film driven by ultrasonic transducers. Like a vibrating droplet, the thing keeping surfaces apart here is a thin, lubricating layer of air. The vibration \[ \] ## [Dragonfly Dogfights](https://fuckyeahfluiddynamics.tumblr.com/post/824667366193496064) _2026-08-11 · FYFD_ Like fighter pilots of old, male dragonflies engage in aerial combat where each tries to outmaneuver the other to keep a sight on their rival’s tail. A recent study observed this combat in the field and uncovered some surprising similarities to dogfighting . (Image and research credit: S. Fabian et al. ; via Ars Technica ) ## [Dragonfly Dogfights](https://fyfluiddynamics.com/2026/08/dragonfly-dogfights/) _2026-08-11 · Nicole Sharp · FYFD_ Like fighter pilots of old, male dragonflies engage in aerial combat where each tries to outmaneuver the other to keep a sight on their rival s tail. A recent study observed this combat in the field and uncovered some surprising similarities to dogfighting. Like pilots, dragonflies used spiraling turns and other high-g moves to gain an \[ \] ## [Blowing Droplets Apart](https://fuckyeahfluiddynamics.tumblr.com/post/824576769416970240) _2026-08-10 · FYFD_ In raindrops, ink-jet printing, and spray painting, droplets get broken apart y the air flowing around them. Here, researchers investigate how a jet of fluid can push a droplet from its perch, or–with enough momentum–shatter the droplet . (Video and image credit: S. Jain et al. ) ## [Blowing Droplets Apart](https://fyfluiddynamics.com/2026/08/blowing-droplets-apart/) _2026-08-10 · Nicole Sharp · FYFD_ In raindrops, ink-jet printing, and spray painting, droplets get broken apart by the air flowing around them. Here, researchers investigate how a jet of fluid can push a droplet from its perch, or with enough momentum shatter the droplet. There are some lovely flow visualizations here; it s especially cool to see the starting vortex ring of the \[ \] ## [The Barrett Vibroacoustics Scaling Method](https://blog.vibrationdata.com/2026/08/07/the-barrett-vibroacoustics-scaling-method/) _2026-08-07 · Tom Irvine · Vibrationdata Engineering Blog_ The Barrett scaling law is one of the oldest tools in the launch vehicle random vibration toolbox, and it is still one of the most used. It answers a question that comes up on every new program before a single accelerometer has been mounted: I have flight data from a previous vehicle, and I have ... Read more ## [Salt and Dunes](https://fuckyeahfluiddynamics.tumblr.com/post/824304950434758656) _2026-08-07 · FYFD_ Photographer Barbara Brown captured these striking aerial views in Namibia. Coastal dunes and saltworks feature in the photos from Walvis Bay, where wind, waves, evaporation, and humankind have shaped the landscape. (Image credit: B. Brown/ IAPOTY ; via Colossal ) ## [Salt and Dunes](https://fyfluiddynamics.com/2026/08/salt-and-dunes/) _2026-08-07 · Nicole Sharp · FYFD_ Photographer Barbara Brown captured these striking aerial views in Namibia. Coastal dunes and saltworks feature in the photos from Walvis Bay, where wind, waves, evaporation, and humankind have shaped the landscape. The colorful and dendritic dune images come from Sossusvlei, where the ephemeral Tsauchab River ends in the Namib Desert. Recent flooding left its mark \[ \] ## [How Corals Stir](https://fuckyeahfluiddynamics.tumblr.com/post/824214395135705089) _2026-08-06 · FYFD_ Reef-building coral polyps constantly stir the water around them with dense carpets of microscopic hair-like cilia. The beating of the cilia helps polyps feed while also pushing away sediment and debris . (Image and research credit: S. Selvan et al. ; via APS ) ## [Snapshot Showdown on Google Play (Sponsored)](https://crawlproof.com/a/MQelM1mCHeIp) _2026-08-06 · **Sponsored**_ Available on Google Play for Android devices. ## [How Corals Stir](https://fyfluiddynamics.com/2026/08/how-corals-stir/) _2026-08-06 · Nicole Sharp · FYFD_ Reef-building coral polyps constantly stir the water around them with dense carpets of microscopic hair-like cilia. The beating of the cilia helps polyps feed while also pushing away sediment and debris. Their stirring increases nutrient and gas exchange with seawater, too. A new study combines experimental measurements with a simple mathematical model to recreate the \[ \] ## [The Subtleties of Pipe Flow](https://fuckyeahfluiddynamics.tumblr.com/post/824123796297547776) _2026-08-05 · FYFD_ If you put a thumb over your hose’s outlet, you get a faster jet, but how does that affect the flow rate? That’s the question Grady starts from in this Practical Engineering video exploring pipe flow physics . (Video and image credit: Practical Engineering) ## [The Subtleties of Pipe Flow](https://fyfluiddynamics.com/2026/08/the-subtleties-of-pipe-flow/) _2026-08-05 · Nicole Sharp · FYFD_ If you put a thumb over your hose s outlet, you get a faster jet, but how does that affect the flow rate? That s the question Grady starts from in this Practical Engineering video exploring pipe flow physics. From continuity and control volumes to practical losses, he touches on both the theory and practice behind this \[ \] ## [Screening for Sleep Apnea](https://fuckyeahfluiddynamics.tumblr.com/post/824033185704902656) _2026-08-04 · FYFD_ Snoring and sleep apnea–a condition where aeroelastic flutter obstructs the airway and stops breathing during sleep–often go hand-in-hand . (Image credit: L. Cline ; research credit: H. Li et al. ; via Physics World ) ## [Rossiter Tones in Aircraft Cavities](https://blog.vibrationdata.com/2026/08/04/rossiter-tones-in-aircraft-cavities/) _2026-08-04 · Tom Irvine · Vibrationdata Engineering Blog_ Cut a rectangular hole in an aerodynamic surface and fly it at high subsonic or supersonic speed, and the hole will sing. Not quietly. Overall sound pressure levels inside a fighter weapon bay routinely exceed 160 dB, and the energy is not spread evenly across the spectrum. It is concentrated into a set of sharp ... Read more ## [Screening for Sleep Apnea](https://fyfluiddynamics.com/2026/08/screening-for-sleep-apnea/) _2026-08-04 · Nicole Sharp · FYFD_ Snoring and sleep apnea a condition where aeroelastic flutter obstructs the airway and stops breathing during sleep often go hand-in-hand. But diagnosing sleep apnea involves an expensive and time-consuming screening in which the patient has to sleep while monitored by various sensors. To make the process easier, researchers are developing a screening method based only on audio \[ \] ## [Microplastics in the Water Column](https://fuckyeahfluiddynamics.tumblr.com/post/823942581090123776) _2026-08-03 · FYFD_ Of the more than 9 billion metric tons of plastic that’s been produced, a mere 9% has been recycled. About 12% has been incinerated, and the remainder is just out there–in our homes, our landfills, and, unfortunately, in our oceans. (Image credit: iStock/dottedhippo ; via Eos ) ## [Microplastics in the Water Column](https://fyfluiddynamics.com/2026/08/microplastics-in-the-water-column/) _2026-08-03 · Nicole Sharp · FYFD_ Of the more than 9 billion metric tons of plastic that s been produced, a mere 9% has been recycled. About 12% has been incinerated, and the remainder is just out there in our homes, our landfills, and, unfortunately, in our oceans. Exactly where all the plastic is continues to be an active question of research. Plastic s \[ \] ## [Aircraft External Store Buffet Random Vibration Modeling](https://blog.vibrationdata.com/2026/08/03/aircraft-external-store-buffet-random-vibration-modeling/) _2026-08-03 · Tom Irvine · Vibrationdata Engineering Blog_ A large external store is to be carried under an aircraft wing on a pylon. The airframe manufacturer runs its buffet analysis and hands the store vendor an acceleration power spectral density at the pylon/wing interface. The vendor applies that PSD as base excitation to a finite element model of the pylon and store, usually ... Read more ## [Random Vibration Response Peak Distribution](https://blog.vibrationdata.com/2026/08/02/random-vibration-response-peak-distribution/) _2026-08-02 · Tom Irvine · Vibrationdata Engineering Blog_ Nearly every random vibration fatigue course teaches that the response of a single-degree-of-freedom system to broadband base excitation has Rayleigh-distributed peaks. The claim is repeated so often that it has hardened into doctrine. It is a good approximation for the largest peaks, which is why it has survived. But it is quantitatively wrong for the ... Read more ## [Quadratic Failure Metrics in Random Vibration](https://blog.vibrationdata.com/2026/08/02/quadratic-failure-metrics-in-random-vibration/) _2026-08-02 · Tom Irvine · Vibrationdata Engineering Blog_ A random vibration analysis in a finite element code will happily report an RMS von Mises stress, or an RMS resultant shear force in a bolt, and the analyst will happily multiply it by three and compare it against an allowable. Both quantities are useful. Both are also quietly non-Gaussian, and their spectral content is ... Read more ## ["Supercell"](https://fuckyeahfluiddynamics.tumblr.com/post/823670807735697408) _2026-07-31 · FYFD_ A supercell thunderstorm in New Mexico appears almost otherworldly in this photo from Dennis Hualong Zhang . (Image credit: D. Zhang; via ILPOTY ) ## [Ice Giant or Magma Ocean World?](https://fuckyeahfluiddynamics.tumblr.com/post/823631650966650880) _2026-07-31 · FYFD_ Uranus and Neptune–known as our system’s ice giants–are our least explored planets. “Ice giant” is one structure that matches the limited measurements we have from these planets, but, as today’s preprint study points out, it’s not the only one . (Image credit: NASA ; research credit: E. Young et al. (preprint); via Gizmodo ) ## [Seismic Mass under Large Shaker](https://blog.vibrationdata.com/2026/07/31/seismic-mass-under-large-shaker/) _2026-07-31 · Tom Irvine · Vibrationdata Engineering Blog_ A question that comes up whenever a laboratory is planning its first large electrodynamic shaker installation: the specification and the quotations keep referring to a seismic mass, or a reaction mass, or an inertia block. Is that a real, physically heavy object that has to be purchased and installed? Or is it a tuned-mass arrangement ... Read more ## [Large Shaker Seismic Mass](https://blog.vibrationdata.com/2026/07/31/150879/) _2026-07-31 · Tom Irvine · Vibrationdata Engineering Blog_ A question that comes up whenever a laboratory is planning its first large electrodynamic shaker installation: the specification and the quotations keep referring to a seismic mass, or a reaction mass, or an inertia block. Is that a real, physically heavy object that has to be purchased and installed? Or is it a tuned-mass arrangement ... Read more ## [Random Vibration Above 2000 Hz: Deriving and Verifying an MPE for Engine-Proximate Components](https://blog.vibrationdata.com/2026/07/30/random-vibration-above-2000-hz-deriving-and-verifying-an-mpe-for-engine-proximate-components/) _2026-07-30 · Tom Irvine · Vibrationdata Engineering Blog_ The Problem Here is a problem that comes up more often than the standards would suggest. An engineer is deriving a random vibration maximum predicted environment (MPE) for launch vehicle components mounted very close to the engines. Accelerometer data from engine test stand and stack tests show significant broadband energy above 2000 Hz, with peaks ... Read more ## [Giant Water Balloon to the Face](https://fuckyeahfluiddynamics.tumblr.com/post/823489559802331136) _2026-07-29 · FYFD_ It’s the summertime, so Gav and Dan of the Slow Mo Guys are back to experimenting with giant water balloons. In this video, they send several careening down a slope into Dan’s face . (Video and image credit: The Slow Mo Guys) ## [Inside an Espresso Bed](https://fuckyeahfluiddynamics.tumblr.com/post/823399027555106816) _2026-07-28 · FYFD_ When pulling a shot of espresso, there are complicated physics at play. The ground coffee is tamped into a puck-like bed of grains, through which high-temperature, high-pressure water is forced . (Image credit: top - R. Wicks , experiment - J. Foster et al. ; research credit: J. Foster et al. ; via Physics World ) ## [‘Two Buckets, Two Loops’ Method](https://blog.yavilevich.com/2026/07/two-buckets-two-loops-method/) _2026-07-28 · Arik Yavilevich · Arik Yavilevich's blog_ This is a story of yet another DIY project. The result is a simple, inexpensive, open-source water-based bed cooling system that uses frozen ice packs instead of active refrigeration. This article explains how it works, why I designed it this way, and where the project stands today. Introduction A comfortable night s sleep is essential for ... Read more The post ‘Two Buckets, Two Loops’ Method… ## [Canyon Swirls](https://fuckyeahfluiddynamics.tumblr.com/post/823308371163824128) _2026-07-27 · FYFD_ For much of the year, Cañon Fiord in the Canadian Arctic lies under ice and snow, but in the summer melt season, colors peek out. Here sea ice and sediment swirl in the fjord in eddies that are kilometers wide . (Image credit: L. Dauphin; via NASA Earth Observatory )