50 results about "Vibration mitigation" patented technology

An apparatus includes a damper, a source of magnetic field coupled to the damper, a colloidal ferro-fluidic damping medium disposed in the damper, a sensor installed on the host structure to measure vibrations, and a vibration control circuit. The output of the sensor is fed back to the control circuit, which outputs a command signal to the source of the magnetic field applied to the damper to change the magnetic field in the damper as well as its damping curve so that the dynamic performance of the host structure installed with the damper is changed automatically to yield maximum vibration mitigation.

Some embodiments of the present invention provide a system that includes a drive carrier for a hard disk drive (HDD) and one or more vibration control clips affixed to the drive carrier. Within this system, a mode of vibration of the HDD is modulated by contact between each of the vibration control clips and a surface within the computer system.

A direct-contact liquid-cooled (DL) Rack Information Handling System (RIHS) includes liquid cooled (LC) nodes having a chassis received in a respective chassis-receiving bay of the rack and containing heat-generating functional components. The LC node configured with a system of conduits to receive direct contact of cooling liquid to regulate the ambient temperature of the node and provide cooling to the functional components inside the node by removing heat generated by the heat-generating functional components. The chassis has a leak containment barrier configured with a trough that underlays a portion of the system of conduits of the LC node and that forms a drain path to a drain port of the chassis. In one or more embodiments, the storage drive carrier has vibration absorbing material that mitigates vibrations of a storage drive placed in the storage drive carrier.

A passive isolator mount capable of dissipating shocks and vibrations as either heat or magnetic energy is presented. The passive isolator includes a pair of L-shaped or C-shaped brackets capable of withstanding repeated deflections and strains, energy dissipating layers disposed along each bracket, and a bond layer. The energy dissipating layers are composed of a rare earth element or alloy, a ferromagnetic shape alloy, a magnetic shape memory alloy, a magnetostrictive alloy, a magneto-mechanical alloy, a super-elastic alloy, or a combination thereof. The bond layer is disposed between and adheres one energy dissipating layer along a first bracket to an energy dissipating layer along a second bracket so that the resultant passive isolator is C-shaped. Energy dissipating and bond layers completely bisect the passive isolator either widthwise through the thickness of the L-shaped brackets or lengthwise through the thickness of the C-shaped brackets.

Systems and methods for mitigating vibration in downhole strings are described. The methods include obtaining first and second load measurements of first and second loads during a drilling operation and creating first and second load measurement data, with first and second load sensors separated by a sensor distance. First and / or second representative values of the first and second loads are determined form the first and second load measurement data and the sensor distance. The determined representative value(s) are compared against respective load limit(s) and a vibration mitigation operation is performed in response to the determined representative value(s) equaling or exceeding the respective load limit.

A vibration mitigation apparatus and method of reducing vibration in a reactor component are described, which may reduce the amplitude of vibration in the reactor component. The apparatus may be provided on the reactor component to reduce the amplitude of vibration of the component as the component and apparatus are subjected to a harmonic excitation that generally may occur during reactor operations.

A method of designing / making an acoustic side branch resonator structured to be coupled to a standpipe of, for example, a nuclear power plant, wherein the acoustic side branch resonator includes a plurality of wire mesh elements for damping purposes. The method includes determining a resonant frequency of the standpipe, determining an active length of the acoustic side branch resonator using the resonant frequency, and determining a particular number of the wire mesh elements to be used in the acoustic side branch resonator and a pitch of each of the wire mesh elements using momentum and continuity equations of a compressible fluid.

A nuclear reactor pressure vessel assembly includes a part in a reactor housing structure. The part includes a body a vibration absorber. The body includes an internal surface. The internal surface of the body defines at least one cavity that is not exposed to an environment external to the body. The vibration absorber includes at least one of a harmonic oscillator connected to the internal surface of the body or an external surface of the body, a shear multiplier in the at least one cavity, a hybrid mass-viscoelastic structure in the at least one cavity and not secured to the internal surface of the body, and a distributed damping structure incorporated into the body.

A drilling rig apparatus is disclosed for mitigating stick-slip using a saver sub that is compatible with different top drives. The saver sub includes a smart material adjustable whenever a stand is added to the drill string to have different spring characteristics to generally match the impedance of the top drive to the impedance of the drill string. The saver sub also includes a magneto rheological fluid that is adjusted whenever a stand is added to the drill string to compensate for the changed characteristics of the drill string. The damping constant implemented by the MR fluid enables the saver sub to absorb stick-slip vibrations at the top drive. Each time that a stand is connected to the drill string, the spring and damping constants may be updated to accommodate the changing characteristics of the drill string.

The invention relates to the field of civil engineering, in particular to a support capable of achieving vibration mitigation and isolation of a building, in particular to a support capable of achieving horizontal vibration mitigation and isolation and vertical vibration mitigation and isolation at the same time, and particularly relates to a simple and compact type three-dimensional friction pendulum vibration isolation support. The simple and compact type three-dimensional friction pendulum vibration isolation support comprising two sets of support plates and spherical crown lining plates which are connected through friction sliding pairs, wherein vertical vibration isolation units are arranged between the two spherical crown lining plates, and horizontal and vertical vibration mitigation and isolation are realized at the same time.

The invention provides a display screen support device. The device comprises a sensing component used for sensing display screen vibration and a vibration mitigation component arranged on the non-display side of a display screen, and the form is adjusted to mitigate vibration of the display screen according to the sensing result of the sensing component. By arranging the sensing component and vibration mitigation component on the display screen, by means of the sensing component, the display screen vibration state is sensed in real time, and the form of the vibration mitigation component is actively adjusted so as to mitigate vibration of the display screen. By means of an active adjustment mode, vibration of the display screen is relieved, damage caused by vibration to the display screenis effectively reduced, and the service life of the display screen is prolonged.

The invention discloses a full-fabricated concrete joint device with a replaceable vibration mitigation and isolation device. The full-fabricated concrete joint device comprises a first connecting piece and a second connecting piece, wherein the first connecting piece and the second connecting piece are connected through a vibration reducing device, a containing groove is formed in the upper end of the first connecting piece, an annular piston is installed in the containing groove, a box body is installed on the inner side face of the annular piston, a partition plate is arranged on the box body, a thread through hole is formed in the inner wall of the containing groove, a bolt is arranged in the thread through hole, a rectangular groove is formed in the inner end face of the bolt, an energy dissipation steel bar is arranged in the rectangular groove, the bottom face of the partition plate is connected to the inner bottom face of the box body through a first spring, the bottom face of the box body is connected to the bottom face of the containing groove through an elastic piece, and the containing groove is filled with hydraulic oil. According to the full-fabricated concrete joint device, vibration energy is consumed through multi-stage vibration reducing, vibration reducing is achieved through the elastic piece and the first spring when the amplitude is smaller, and when the amplitude is larger, a similar self-feedback function is formed at the moment, the function of continuously supporting a building is achieved, an energy dissipation steel bar can be conveniently replaced, and the device can be continuously used.

A low-vibration collar system for vibration mitigation in a device towed in water. The low-vibration collar system includes a clamp attached to a streamer towed underwater by a seismic vessel, the streamer comprising a plurality of sensors to record seismic data; a collar configured to be attached to the clamp; a connecting mechanism located on the collar and configured to attach an ancillary device to the collar; and a vibration mitigation system configured to attenuate an amplitude of a vibration produced by the ancillary device. The vibration interferes with seismic data recorded by seismic sensors located on the streamer.

A stick-slip vibration mitigation system and a method of using the system are provided. The system includes a sensor, a processor, a non-transitory storage medium, and a controller. The system is operable to be used with a drill-string in a wellbore during a drilling process to mitigate stick-slip vibration of the drill-string.

Method and dynamic vibration absorber device for reducing a resonant frequency of a node to which the dynamic vibration absorber device is attached to. The dynamic vibration absorber device includes a housing configured to be attached to the node; an absorber mass located inside the housing; and first and second diaphragms attached to the housing and configured to suspend the absorber mass inside the housing. The dynamic vibration absorber device changes a resonant frequency of the node to two smaller vibration peaks.

The invention discloses a magneto-rheological pipeline vibration mitigation system and a vibration mitigation method. The magneto-rheological pipeline vibration mitigation system comprises vibration sensors, a vibration mitigation mechanism and a controller, wherein the vibration sensors are arranged at the front end of a position, needing vibration mitigation, of the pipeline and are uniformly and fixedly arranged along the circumferential direction of the pipeline, the vibration mitigation mechanism comprises a shaft sleeve which is fixedly arranged on the outer periphery of a position, needing vibration mitigation, of the pipeline in a sleeve mode and magneto-rheological dampers which are fixedly connected between the shaft sleeve and the pipeline in a distributed manner along the circumferential direction of the pipeline, and the controller is connected with the vibration sensors and the magneto-rheological dampers, and is used for receiving the vibration quantity detected by eachvibration sensor in real time, adjusting a control current of the magneto-rheological damper at the corresponding position according to the vibration quantity, and then adjusting damping force of magneto-rheological fluid in the magneto-rheological dampers. According to the vibration mitigation system and vibration mitigation method, the vibration quantity to be transmitted can be obtained, an anti-vibration response can be made in advance, and finally the effects of mitigating vibration according to needs and mitigating vibration according to the quantity are achieved.

Method and apparatus for mitigating vibrations in a device towed in water. The apparatus includes one or more tuned elastic sections having a complex spring rate and adapted to attenuate vibrations in a specified frequency range; and a head end coupler adapted to couple the apparatus for vibration mitigation to a component of an electro-mechanical cable or a tow assembly. One of the one or more tuned elastic sections is coupled to the head end coupler with a high impedance material interface.

The present application generally relates noise and vibration mitigation in a vehicle. More specifically, the application teaches a system and method for applying a noise and vibration constraint to avehicle subsystem, measuring a sound level within the vehicle cabin, determining the sound level exceeds a threshold level making the noise constraint redundant and removing the noise constraint in response to the sound level exceeding the threshold level.

A fabric treating machine according a present invention comprises a first vibration mitigation part which is disposed between a stator and a bearing unit. Therefore, it can reduce the transfer of the vibration from the driving unit to the bearing unit, and the vibration of an inner tub and an outer tub can be reduced, and a noise can be reduced. Thus, a reliability of product can be improved. Also, a fabric treating machine according a present invention comprises a vibration mitigation part which is disposed between an upper bearing unit and a lower bearing unit. Therefore, it can reduce the vibration transfer from the lower bearing unit to the upper bearing unit, and the vibration of an inner tub and an outer tub can be reduced, and a noise can be reduced.

Methods and apparatus are provided for mitigating vibration in a vehicle. The apparatus can include a first sensor that generates a first signal that indicates a first phase angle of a first wheel of the vehicle and a second sensor that generates a second signal that indicates a second phase angle of a second wheel of the vehicle. The apparatus can further include a control module that based on the first signal and the second signal outputs a third signal to adjust at least one of the first phase angle and the second phase angle when the vehicle is experiencing a vibration.

The invention discloses a single lever type consolidation instrument and belongs to the technical field of mine geotechnical engineering. The single lever type consolidation instrument provided by theinvention comprises a digital display dial gauge, a consolidation device, a lever, a lifting platform and the lever type consolidation instrument. In the single lever type consolidation instrument provided by the invention, a lifting platform is installed on the base of the equipment to effectively reduce the impact force brought by manual weight application and the disturbance to the sample, thestopwatch is turned on to observe the change of the soil sample immediately after the load is applied to enable reduction of errors when applying the weight, a positioning groove is used at the position of the hook to enable the weight disk support rod to be firmly fixed in the positioning groove such that the double vibration mitigation can greatly reduce the errors when the weight is increased,a laser pen placement hole is arranged in the support frame and a laser pen can be placed in the laser pen placement hole such that a parallel laser beam is emitted after the laser lamp is turned onand can be used as a tool for auxiliary standard calibration, and the laser pen itself is low in cost, standard and efficient, and can be used as needed to reduce errors in adjusting the balance of the lever.

The invention provides a vibration attenuation device with a warning function and for a transplanter, and a vibration attenuation method thereof. An upper connection arm mechanism and a lower connection arm mechanism in the vibration attenuation device are capable of hindering the up-down movement of a main shaft through the return force of a return spring in a process of moving up and down alongwith the main shaft, and then hindering the vibration of a base, so that the purpose of attenuating vibration is achieved; and meanwhile, a pressure sensing device is arranged at the bottom of a cylinder body, and a current in a warning circuit connected with the pressure sensing device is changed through the gas pressure generated due to compression or expansion of a gas in the cylinder body, sothat a warning device is capable of emitting lights with different colors, and then capable of reminding working personnel to adjust and repair the related components of the machine in time. The vibration attenuation device is capable of furthest attenuating the vibration stressed by the transplanter, and capable of reminding the working personnel to adjust and repair the related components of themachine in time, so that longer-time harm to the bodies of the working personnel and longer-time damage to the transplanter are avoided, the working efficiency is increased, and the service life of the transplanter is prolonged.