Inerter unit and spring unit parallel connection ternary vibration reducing device and design and assembling method
A technology of spring unit and vibration damping device, which is applied in the direction of spring/shock absorber, spring, magnetic spring, etc., to achieve the effect of simple structure, improved eddy current damping coefficient, and easy disassembly and assembly
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Embodiment 1
[0051] Such as Figure 1 to Figure 6 As shown, a ternary damping device of a parallel inertial mass and spring unit in this embodiment includes a spring unit, a damping unit and an inertial mass unit, and the inertial mass unit and the spring unit are connected in parallel with the damping unit in series; the The damping unit includes a first ball screw system, multiple conductor plates 5, two E-shaped iron cores 4 and multiple sets of first energized coils 21. In this embodiment, the number of conductor plates 5 is three, and they are arranged parallel to each other. , the shape is a circular plate, the first energized coil 21 adopts four groups, the first ball screw system includes the first ball screw 23 and the first ball nut 2 sleeved on the first ball screw 23, the said The first ball screw 23 passes through the first ball nut 2 and the conductor plate 5 sequentially from top to bottom; the inertia unit includes a second ball screw system and a flywheel 19, and the secon...
Embodiment 2
[0077] Embodiment 2. This embodiment provides a calculation example of the design method of a ternary vibration damping device with parallel inertia and spring units, specifically:
[0078] Yueyang Dongting Lake Bridge is located at the interface between Dongting Lake and the Yangtze River. It is a super-large highway bridge connecting Yueyang and Huarong, with a total length of 5747.82m. A total of 222 cables are arranged on the whole bridge. After testing, the A11 cable force downstream of the Yueyang side tower is 3095N, the first-order modal frequency is 1.11Hz, the cable length is 114.72m, and the unit mass is 51.8kg / m.
[0079] Taking the A11 cable as the damping object, the optimal design of the ternary damping device with parallel inertial mass and spring elements is carried out for the first-order mode: based on the finite difference method, a refined analysis model for the coupling system of the stay cable and the ternary damper is established , using the Runge-Kutta...
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