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A platform for research: civil engineering, architecture and urbanism
Quasi-zero stiffness vibration isolation method for floating slab ballast bed of urban rail transit tunnel
According to the quasi-zero stiffness vibration isolation method and system device for the floating slab track bed of the urban rail transit tunnel, a quasi-zero stiffness vibration isolation device is arranged in a concrete floating slab on the floating slab track bed of the urban rail transit, and the quasi-zero stiffness vibration isolation device comprises a positive stiffness assembly, a negative stiffness combined part and a height adjusting base plate; enabling the concrete floating slab to be in a floating state on the floating slab track bed through the quasi-zero stiffness vibration isolation device; the negative stiffness combined part is annularly arranged on the positive stiffness assembly through a plurality of rotatable flat springs and floats along with a bearing platform at the upper end of the positive stiffness assembly, negative stiffness is formed through the rotatable flat springs in the floating process, and quasi-zero stiffness vibration isolation of the concrete floating slab is achieved. Negative stiffness is formed through stiffness changes of the rotatable flat springs in the vibration process, and the dynamic stiffness of the vibration isolation system is low or approaches zero, so that good low-frequency vibration isolation performance is obtained, and the vibration isolation efficiency of the system is improved; the device has the characteristics of simple structure, high reliability and long service life.
城市轨道交通隧道浮置板道床的准零刚度隔振方法及系统装置，在城市轨道交通的浮置板道床上的混凝土浮置板中设置准零刚度隔振装置，准零刚度隔振装置包括正刚度组件、负刚度组合部件和调高垫板，通过准零刚度隔振装置使混凝土浮置板在浮置板道床上处于浮置状态；所述负刚度组合部件由多块可转动片弹簧环状布置在正刚度组件上面，并随正刚度组件上端承载平台浮动，在浮动过程中通过可转动片弹簧形成负刚度，实现混凝土浮置板准零刚度的隔振。本发明通过多块可转动片弹簧在振动过程中的刚度变化形成负刚度，并使得隔振系统的动态刚度低或趋近于零，从而获得了很好的低频隔振性能，提高了系统隔振效率；具有结构简单，可靠性高，使用寿命长的特点。
Quasi-zero stiffness vibration isolation method for floating slab ballast bed of urban rail transit tunnel
According to the quasi-zero stiffness vibration isolation method and system device for the floating slab track bed of the urban rail transit tunnel, a quasi-zero stiffness vibration isolation device is arranged in a concrete floating slab on the floating slab track bed of the urban rail transit, and the quasi-zero stiffness vibration isolation device comprises a positive stiffness assembly, a negative stiffness combined part and a height adjusting base plate; enabling the concrete floating slab to be in a floating state on the floating slab track bed through the quasi-zero stiffness vibration isolation device; the negative stiffness combined part is annularly arranged on the positive stiffness assembly through a plurality of rotatable flat springs and floats along with a bearing platform at the upper end of the positive stiffness assembly, negative stiffness is formed through the rotatable flat springs in the floating process, and quasi-zero stiffness vibration isolation of the concrete floating slab is achieved. Negative stiffness is formed through stiffness changes of the rotatable flat springs in the vibration process, and the dynamic stiffness of the vibration isolation system is low or approaches zero, so that good low-frequency vibration isolation performance is obtained, and the vibration isolation efficiency of the system is improved; the device has the characteristics of simple structure, high reliability and long service life.
城市轨道交通隧道浮置板道床的准零刚度隔振方法及系统装置，在城市轨道交通的浮置板道床上的混凝土浮置板中设置准零刚度隔振装置，准零刚度隔振装置包括正刚度组件、负刚度组合部件和调高垫板，通过准零刚度隔振装置使混凝土浮置板在浮置板道床上处于浮置状态；所述负刚度组合部件由多块可转动片弹簧环状布置在正刚度组件上面，并随正刚度组件上端承载平台浮动，在浮动过程中通过可转动片弹簧形成负刚度，实现混凝土浮置板准零刚度的隔振。本发明通过多块可转动片弹簧在振动过程中的刚度变化形成负刚度，并使得隔振系统的动态刚度低或趋近于零，从而获得了很好的低频隔振性能，提高了系统隔振效率；具有结构简单，可靠性高，使用寿命长的特点。
Quasi-zero stiffness vibration isolation method for floating slab ballast bed of urban rail transit tunnel
一种城市轨道交通隧道浮置板道床的准零刚度隔振方法
LI JINWEI (author) / XIA JUNYONG (author) / GUAN FENG (author) / QIU SHANG (author) / BAI JIANJUN (author) / NING XIANGLIANG (author)
2023-12-08
Patent
Electronic Resource
Chinese
IPC:
E01B
PERMANENT WAY
,
Gleisoberbau
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