CN-122013906-A - Variable-frequency hydraulic type inertia Rong Zhenzhen double-control system

CN122013906ACN 122013906 ACN122013906 ACN 122013906ACN-122013906-A

Abstract

The invention relates to a variable-frequency hydraulic type inertia Rong Zhenzhen double-control system which comprises a variable-stiffness unit, a displacement triggering unit, a linkage unit and an inertia damping unit, wherein the variable-stiffness unit comprises a spring group comprising a long spring and a short spring, the displacement triggering unit comprises a displacement boundary module and a triggering plate, a triggering gap is preset between the displacement boundary module and the triggering plate, the inertia damping unit comprises a hydraulic cylinder filled with viscous damping liquid and a spiral pipe, a piston is arranged in the hydraulic cylinder in a sliding mode and is provided with a damping hole, when relative displacement is smaller than the triggering gap, only the long spring provides elastic restoring force, the viscous damping liquid flows through the damping hole and the spiral pipe to generate damping force and inertia force, and when the relative displacement exceeds the triggering gap, the triggering plate drives the short spring to participate in working so as to provide increased elastic restoring force. The invention can automatically switch rigidity according to displacement amplitude, and realize wind vibration and earthquake double control.

Inventors

GUO XUEYUAN
LI XIANGMIN
LENG YUBING
XU QINGFENG
ZHANG FUWEN
WANG PENGCHENG

Assignees

上海市建筑科学研究院有限公司
上海建科咨询集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (10)

1. The variable-frequency hydraulic type inertial Rong Zhenzhen double-control system comprises a first connecting piece (1) and a second connecting piece (9) which are used for connecting a building structure, and is characterized by further comprising a variable stiffness unit, a displacement triggering unit (4), a linkage unit (5) and an inertial damping unit which are arranged in series; the stiffness-changing unit comprises an end plate (2) and a group of spring groups (3), wherein the spring groups (3) comprise a long spring and at least one short spring, one ends of all the springs are jointly fixed on the end plate (2), and the free end length of the long spring is longer than that of the short spring; The displacement triggering unit (4) comprises a displacement boundary module (41) fixedly connected to the free end of the short spring, and a triggering plate (42) fixedly connected with the free end of the long spring and accommodated in the displacement boundary module (41), wherein a triggering gap is preset between the triggering plate (42) and the inner wall of the displacement boundary module (41); The linkage unit (5) comprises a piston rod (51) and a piston (52) fixed at one end of the piston rod, and the other end of the piston rod (51) is fixedly connected with the trigger plate (42); The inertial damping unit comprises a sealed hydraulic cylinder (7) filled with viscous damping liquid (72) and a spiral pipe (6) with two ends communicated with the inside of the hydraulic cylinder (7) and wound outside the hydraulic cylinder, the piston (52) is arranged in the hydraulic cylinder (7) in a sealing and sliding manner and divides the inner cavity of the hydraulic cylinder into two working chambers, and a damping hole communicated with the two working chambers is formed in the piston (52); the first connecting piece (1) is connected with the end plate (2), and the second connecting piece (9) is connected with the hydraulic cylinder (7); When the relative displacement between the first connecting piece (1) and the second connecting piece (9) is smaller than the trigger gap, only the long spring provides elastic restoring force, meanwhile, the linkage unit (5) drives the piston (52) to move, viscous damping liquid (72) flows through the damping hole to generate damping force and partially flows into the spiral tube (6) to generate inertia force, and when the relative displacement reaches and exceeds the trigger gap, the trigger plate (42) contacts with the displacement boundary module (41) and drives the short spring to participate in working so as to provide increased elastic restoring force.
2. Variable frequency hydraulic inertial Rong Zhenzhen double control system according to claim 1, characterized in that the spring stack (3) comprises one anti-wind spring (32) as the long spring and two anti-seismic springs (31, 33) as the short springs, both anti-seismic springs (31, 33) being of the same length and symmetrically arranged about the centre of the end plate (2).
3. The variable frequency hydraulic type inertia Rong Zhenzhen double control system according to claim 2, wherein the stiffness of the wind-resistant spring (32) is determined based on the stiffness required by the main control frequency of the system under wind-resistant working conditions, and the sum of the stiffness of the two anti-seismic springs (31, 33) is determined based on the difference between the stiffness required by the main control frequency of the system under anti-seismic working conditions and the stiffness of the wind-resistant spring (32).
4. The variable frequency hydraulic inertial Rong Zhenzhen dual control system according to claim 1, wherein the displacement boundary module (41) is a cylindrical structure with openings at the top and bottom, the trigger plate (42) is a circular plate with a diameter smaller than the inner diameter of the displacement boundary module (41) to form the annular trigger gap, and the trigger plate (42) is located at the central position of the displacement boundary module (41) along the axial direction when the system is in the balance position.
5. The variable frequency hydraulic inertial Rong Zhenzhen dual control system of claim 4, wherein when the relative displacement reaches and exceeds the trigger gap, the trigger plate (42) contacts an end inner wall of the displacement boundary module (41), driving the displacement boundary module (41) to compress or stretch the short spring, so that the short spring and the long spring together provide elastic restoring force.
6. The variable frequency hydraulic type inertia Rong Zhenzhen double control system according to claim 1, wherein a plurality of through holes (53) serving as the damping holes are uniformly formed in the piston (52) along the circumferential direction of the piston.
7. The variable frequency hydraulic inertial Rong Zhenzhen dual control system according to claim 6, characterized in that the ratio of the diameter of the spiral pipe (6) to the diameter of the through hole (53) is determined based on the ratio of the inertial force required by the system to the viscous damping force.
8. The variable frequency hydraulic type inertia Rong Zhenzhen double control system according to claim 1, wherein the inertia damping unit further comprises a regulating valve (8) arranged between the spiral pipe (6) and the hydraulic cylinder (7), the tail end of the spiral pipe (6) is communicated with the inside of the hydraulic cylinder (7) through the regulating valve (8), and the regulating valve (8) is a bidirectional valve capable of controlling the flow of viscous damping liquid (72) flowing through the spiral pipe (6) through regulating the opening degree.
9. The variable frequency hydraulic type inertia Rong Zhenzhen double control system according to claim 1, wherein the hydraulic cylinder (7) comprises an outer cylinder (71), viscous damping fluid (72) filled in the outer cylinder (71) and a sealing ring (73) for sealing the piston rod (51), and interfaces respectively communicated with the beginning end and the tail end of the spiral tube (6) are arranged on the side wall of the outer cylinder (71).
10. The variable frequency hydraulic inertial Rong Zhenzhen dual control system according to any one of claims 1 to 9, characterized in that the first connector (1) is a first ear ring fixedly connected to the end plate (2), the second connector (9) is a second ear ring fixedly connected to the hydraulic cylinder (7), and the center of the end plate (2), the center of the long spring, the center of the displacement border module (41), the center of the trigger plate (42), the center of the piston rod (51), the center of the piston (52), the center of the hydraulic cylinder (7) and the center of the connection surface of the second connector (9) and the hydraulic cylinder (7) are on the same straight line.

Description

Variable-frequency hydraulic type inertia Rong Zhenzhen double-control system Technical Field The invention relates to the technical field of vibration control and energy consumption and shock absorption of civil engineering structures, in particular to a variable-frequency hydraulic type inertia Rong Zhenzhen double-control system. Background With the increasing popularity of high-rise and super-high-rise buildings and large-span space structures, the threat of wind-induced vibration and earthquake actions faced by the structures is more and more prominent. In order to ensure structural safety and use comfort, various passive vibration control devices are widely studied and applied. Such devices do not require an external source of energy, and dissipate or transfer the energy of the structure vibrations through additional damping, stiffness or mass elements, thereby mitigating the dynamic response of the body structure. In passive control techniques, inertial components are of interest because they are capable of providing apparent inertial forces that are much greater than their physical mass. As one of the realization forms, hydraulic inertial energy is used, and the linear motion of a structure is converted into the rotary motion of fluid through the motion of the fluid in a closed loop, so that a remarkable inertial effect is generated, and the hydraulic inertial energy has viscous damping characteristics. Such devices can exhibit good energy dissipation efficiency under a single type of dynamic load. But building structures may experience different disaster loads of disparate characteristics throughout their life cycle. The wind vibration action generally causes high-frequency and small-amplitude reciprocating motion of the structure, and at the moment, the control device needs to provide enough initial rigidity to limit the displacement of the structure, so that the normal use function is ensured. The earthquake action typically induces low-frequency and large-amplitude vibration of the structure, and the control device is required to have sufficient deformability and energy consumption capacity at the moment so as to absorb huge earthquake input energy and prevent the damage of the main structure. In the prior art, performance parameters such as rigidity, damping and the like of the passive control device are usually fixed during design and manufacturing. It is difficult for a single performance parameter device to simultaneously optimize the two conditions of adapting wind vibration and earthquake, which are almost opposite in frequency and displacement amplitude. If two independent control systems aiming at wind vibration and earthquake are respectively installed, the cost and the design complexity are obviously improved, and if a compromise design is adopted, the optimal control effect is difficult to obtain under any working condition. Disclosure of Invention Based on the above, it is necessary to provide a variable-frequency hydraulic inertial Rong Zhenzhen dual-control system capable of adaptively adjusting the dynamic characteristics according to the amplitude or frequency characteristics of external excitation so as to effectively cope with two disasters of wind vibration and earthquake. The invention provides a variable-frequency hydraulic type inertia Rong Zhenzhen double-control system, which comprises a first connecting piece and a second connecting piece which are used for connecting a building structure, and further comprises a variable stiffness unit, a displacement triggering unit, a linkage unit and an inertia damping unit which are arranged in series; the variable stiffness unit comprises an end plate and a group of spring groups, wherein the spring groups comprise a long spring and at least one short spring, one end of each spring is jointly fixed on the end plate, the free end length of each long spring is larger than that of each short spring, the displacement triggering unit comprises a displacement boundary module fixedly connected with the free end of each short spring, and a triggering plate fixedly connected with the free end of each long spring and accommodated in the displacement boundary module, a triggering gap is reserved between the triggering plate and the inner wall of each displacement boundary module, the linkage unit comprises a piston rod and a piston fixed at one end of the piston rod, the other end of the piston rod is fixedly connected with the triggering plate, the inertia-containing damping unit comprises a sealing liquid cylinder filled with viscous damping liquid, and a spiral pipe with two ends communicated with the inside of the liquid cylinder and wound on the outside of the same, the piston is hermetically and slidably arranged in the liquid cylinder and divides the inner cavity of the piston into two working chambers, a damping hole communicated with the two working chambers is formed in the piston, a first connecting piece is connected with the end