5 results about "Tuned liquid damper" patented technology

This invention discloses a semi-active vibration suppression device and its control method for hybrid-tower wind turbines, belonging to the field of wind turbine vibration control technology. The device includes a main frame, pulley system, water tank, spring, magnetorheological damper, and intelligent controller. The pulley system enables bidirectional sliding between the frames, allowing the water tank to move freely in the horizontal plane. The water tank contains antifreeze and vibration-damping fluid, forming a tuned liquid damper. The spring and magnetorheological damper are connected parallel to each other to the frame. The control method employs a strategy combining an offline sample database and online PID fine-tuning: offline, a genetic algorithm is used to optimize PID parameters under different operating conditions to build a database; online, the current operating condition is identified to match initial parameters, and a fine-tuning genetic algorithm is used to optimize the PID parameters in real time, adjusting the damping force of the magnetorheological damper. This invention integrates the semi-active adjustment capability of the magnetorheological damper with the passive vibration absorption advantage of the tuned liquid damper, achieving multi-frequency vibration suppression. It features a compact structure, fast response, and strong adaptability, effectively extending the unit's lifespan and reducing operation and maintenance costs.

This invention discloses a rotatable, actively tuned liquid damper, comprising a damper housing with a first open side and a second closed side arranged opposite each other along its height. The damper housing is filled with a tuning liquid. A base is mounted on the closed side of the damper housing. A liquid level sensor is fixed to the inner wall of the damper housing. A main structure connecting plate is used for connection to the main structure. A servo motor is mounted on the main structure connecting plate, and the output shaft of the servo motor is connected to the base to drive the damper housing to rotate with the base. A cover is mounted on the open side of the damper housing for opening / closing the damper housing. This invention can adjust the liquid level of the tuned liquid damper to avoid frequency jumps to a certain extent, thereby achieving a good vibration reduction effect.

The present application belongs to the field of structural wind-induced vibration control, and relates to a design method of a novel tuned liquid damper with inertial container, comprising the following steps: S1, determining the installation floor of the TLD device and the inertial container device according to the design of the main structure; S2, designing the effective mass, the sloshing frequency and the damping ratio of the TLD according to the dynamic characteristic parameters of the controlled structure; S3, designing the geometric size and the water storage height of the TLD in combination with the structure plane shape and the space limitation of the floor where the TLD is located; S4, designing the inertance coefficient β of the inertial container device in combination with the mass of the main structure; S5, calculating the stiffness K of the linear spring element connected to the TLD and the damping coefficient C of the damping element; S6, establishing the motion equation of the main structure-TLDI system, and calculating the vibration response and the damping rate of the main structure; S7, judging whether the novel tuned liquid damper (TLDI) with inertial container can make the controlled structure achieve the ideal control effect. Compared with the same type of TLCDI and TMDI devices, the novel tuned liquid damper (TLDI) with inertial container has superiority in economy and space utilization.

The invention discloses an aquaculture net cage based on a wind power plant, which belongs to the technical field of fusion of marine renewable energy sources and marine ranching and comprises a wind generating set, a floating platform and an aquaculture net cage unit. The interior of the floating type platform is divided into at least two independent cabins through partition plates, water in a specific proportion is injected into the cabins to form a multi-order tuning liquid damper, and multi-order vibration of the platform in the marine environment is effectively restrained. The aquaculture net cage unit is connected to the lower portion of the floating type platform, a net of the aquaculture net cage unit is of a spiral surrounding curved surface structure and is supported by a framework with the adjustable lead angle, and axial vortex is formed under the effect of natural water flow to achieve self-cleaning. The system is further provided with an intelligent bait casting unit, and bait casting strategies can be dynamically adjusted according to real-time ocean current data. By means of the integrated design, efficient fusion of offshore wind power and deep sea breeding is achieved, and the device has the advantages of being stable in structure, self-cleaning, high in bait utilization rate, self-sufficient in energy and the like.

The application relates to an adjustable composite tuning liquid damper for structural vertical vibration control, comprising a base fixedly connected to a main structure; a slide rail vertically arranged on the base; a support frame slidably connected with the slide rail and capable of sliding up and down along the slide rail; a liquid vibration unit arranged in the support frame and fixedly connected with the support frame; and a vibration control unit located between the support frame and the base, with two ends of the vibration control unit being connected with the bottom of the support frame and the upper surface of the base respectively, wherein the vibration control unit comprises a spring element and a damper element arranged in parallel. Compared with the prior art, the application considers both low-frequency tuning capability and effective damping mass, realizes adjustable parameters, and enables effective mass to fully participate, so as to meet the engineering requirements of large-scale structural vertical tuning vibration control.