11 results about "Vibration mitigation" patented technology

The invention relates to a self-adaptive tuning inerter damping device and method for suppressing vertical micro-vibration of a structure. The self-adaptive tuning inerter damping device comprises a bearing base, a tuning mass block, a vibration system connecting the bearing base and the tuning mass block, a pneumatic control system and an intelligent measurement and control system. The vibration system is formed by connecting an outer side air spring set and a central air spring in series with a hydraulic inerter unit, an adjustable damping branch and a fixed inerter branch which are connected in parallel are integrated in the hydraulic unit and are respectively provided with an electro-hydraulic proportional valve and a spiral pipe type hydraulic inerter, so that adjustable damping and mass amplification are realized. The pneumatic system adjusts the air pressure of each air spring through an independent air path and a proportional valve so as to change the rigidity. An intelligent system monitors vibration through a sensor, a central controller identifies excitation frequency and optimizes parameters based on a kinetic model, and rigidity and damping are synchronously adjusted. According to the invention, the problem that a mechanical inerter is insufficient in response to micro-vibration is solved, the defects that a traditional passive device is narrow in frequency band and easy to detune are overcome, and broadband, self-adaptive and high-performance suppression of vertical micro-vibration of a structure is realized.

Systems and methods for suppression of vortex induced vibration (VIV) in subsea conduits are disclosed, as may be used in oil and gas, carbon capture and storage, subsea mining or any other subsea operations where multiple conduits extend between a floating vessel and the sea floor and are subjected to VIV causing currents. VIV suppression elements may be wrapped around one or multiple conduits, and along their entire length or in regions where VIV effects are anticipated. The suppression members may also help to alleviate damage due to clashing of the conduits under the influence of the water currents.

A pickleball paddle with improved vibration mitigation is described. An example pickleball paddle comprises a handle comprising one or more first structural materials, a striking blade comprising one or more second structural materials, and a transition section continuous with and located between the striking blade and the handle to form the pickleball paddle. The transition section comprises a throat that is covered by a structural material that connects the handle to the striking blade and comprises vibration absorbing component. In another example pickleball paddle, the transition section, formed with one or more vibration dampening materials, indirectly connects the striking blade to the handle. A cross-section of at least a part of the transition section in the vertical direction is devoid of the handle and the striking blade.

A method for mitigating vibrations on a wind turbine generator (100). The method includes providing a drone (10) carrying an airflow disruption line (6) on a spool (14), securing a first portion (8) of the airflow disruption line (6) at a first attachment position on the wind turbine generator (100), deploying the airflow disruption line (6) around at least one part of the wind turbine generator (100) by flying the drone (10) around the at least one part from the first attachment position to a second attachment position on the wind turbine generator (100), and securing a second portion (9) of the airflow disruption line (6) to the second attachment position. The method enables efficient installation and removal of vibration mitigation devices on wind turbine generators (100) same with minimal manual intervention, reducing downtime and maintenance costs while effectively mitigating various types of vibrations in wind turbine structures.

The present disclosure relates to methods for installing and uninstalling devices for reducing vibrations in wind turbines and to such devices. More particularly, the present disclosure relates to methods for installing and uninstalling devices for reducing vortex induced vibrations and stall induced vibrations when the wind turbine is parked, especially during wind turbine installation and / or maintenance, and to such devices. A method for installing a vibration mitigating device for mitigating wind turbine vibrations on a wind turbine blade of a parked wind turbine is provided. The method comprises moving the vibration mitigating device at least partially around the wind turbine blade using one or more drones; and securing the vibration mitigating device to the wind turbine. In some examples, the vibration mitigating device may be carried to the wind turbine blade using the one or more drones.

Systems and methods for suppression of vortex induced vibration (VIV) in subsea conduits are disclosed, as may be used in oil and gas, carbon capture and storage, subsea mining or any other subsea operations where multiple conduits extend between a floating vessel and the sea floor and are subjected to VIV causing currents. VIV suppression elements may be wrapped around one or multiple conduits, and along their entire length or in regions where VIV effects are anticipated. The suppression members may also help to alleviate damage due to clashing of the conduits under the influence of the water currents.

An encoder-based galvanometer system is adapted for reducing vibrations within a galvanometer by placing structural elements and a vibration reducing damping material within an encoder. The disclosed systems and methods provide positioning error reduction and improved dynamic performance for encoder-based galvanometer systems.

A fan and low-pressure compressor assembly of a gas turbine engine includes a fan operably connected to a first shaft of the gas turbine engine, and a low-pressure compressor rotor operably connected to the first shaft, the low-pressure compressor rotor and the fan sharing a common central longitudinal axis. A fan load path of the fan is separate from a low-pressure compressor rotor load path of the low-pressure compressor rotor.

This disclosure relates to methods for installing and removing vibration mitigation devices on wind turbines and such devices. More specifically, it relates to methods for installing and removing devices to reduce vortex-induced vibrations and stall-induced vibrations when the wind turbine is stationary, particularly during wind turbine installation and / or maintenance. A method is provided for installing a vibration mitigation device to mitigate vibrations of a stationary wind turbine on a wind turbine blade. The method comprises moving the vibration mitigation device, at least partially, around the wind turbine blade using one or more drones; and attaching the vibration mitigation device to the wind turbine.In some examples, the vibration mitigation device can be transported to the wind turbine blade using one or more drones.

Disclosed is a novel methodology for vibration and noise control using modular rail particle damper in rail transit systems, which comprises steps: determining a target damper module corresponding to a vibration frequency content of a rail system, multiple target damper modules are adopted; connecting target damper module by adopting a connecting module so as to form a rail particle damper; and installing rail particle damper at rail web to conduct vibration and noise control on the rail system. Target damper modules are connected through connecting modules to form an integrated rail particle damper, a wide vibration mitigation frequency range is formed by adopting different target damper modules, and therefore rail particle damper is suitable for reducing broadband vibration and noise generated in rail systems under different operating environments.

This invention discloses a drilling rig vibration damping and buffering connector, including an upper connector, an intermediate housing, a floating output shaft, an axial vibration damping component, and a circumferential vibration damping component. The upper connector is fixedly connected to one end of the intermediate housing, and one end of the floating output shaft is slidably inserted into the interior of the intermediate housing. The axial vibration damping component is used to buffer and eliminate axial vibration; the circumferential vibration damping component is used to buffer and eliminate circumferential vibration. This invention achieves multi-dimensional, all-condition vibration damping and buffering effects. The axial component adopts a mating disc spring combination structure, which effectively buffers and eliminates axial vibration. The energy storage effect of the disc spring reduces the energy transmission loss of the drilling system. The circumferential component adopts a trapezoidal cross-section circumferential buffer pad, which simultaneously achieves radial vibration damping while buffering circumferential vibration.