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(1 廣州大學(xué)土木工程學(xué)院, 廣州 510006; 2 廣東省建筑設(shè)計研究院有限公司, 廣州 510010)
摘要: 設(shè)計制作了一種由圓柱螺旋彈簧與筒式黏滯阻尼器組合而成的彈簧-阻尼減振支座用于豎向減振,對其進行了頻率相關(guān)性、位移幅值相關(guān)性以及反復(fù)加載相關(guān)性試驗,測得了不同工況下的阻尼耗能、等效剛度、等效黏滯系數(shù)和損耗因子,研究了軸承力學(xué)性能對位移幅值和加載頻率的影響. 采用 Kelvin 模型對彈簧-阻尼減振支座的遲滯回線進行了計算和擬合,將擬合結(jié)果和試驗結(jié)果進行對比分析. 研究表明:彈簧-阻尼減振支座遲滯回線飽滿、力學(xué)性能穩(wěn)定,具有較強的耗能性能;加載頻率對支座等效剛度與等效黏滯系數(shù)的影響顯著,位移幅值對支座阻尼耗能和損耗因子的影響較大,加載圈數(shù)的增加對支座力學(xué)性能影響較小. Kelvin 模型可以有效模擬彈簧-阻尼減振支座的性能.
關(guān)鍵詞: 彈簧-阻尼減振支座; 筒式黏滯阻尼器; 圓柱螺旋彈簧; 頻率相關(guān)性; 位移幅值相關(guān)性; 反復(fù)加載相關(guān)性
中圖分類號:TU317. 1,TB535. 1 文獻標(biāo)志碼:A 文章編號:1002-848X(2022)05-0048-07
DOI:10. 19701 / j. jzjg. ZJ210012
Experimental study on properties of spring-damping anti-vibration bearings
REN Hongxia1, OU Tong2, WANG Dayang1, TAN Jian2
(1 School of Civil Engineering, Guangzhou University, Guangzhou 510006, China;2 GuangDong Architectural Design & Research Institute Co., Ltd., Guangzhou 510010, China)
Abstract: Spring-damping anti-vibration bearings which combine cylindrical helical springs with cylinder-type viscousdamper were designed and fabricated for vertical vibration, and the frequency dependence, displacement amplitudedependence and cyclic loading dependence tests were carried out. The damping dissipation energy, equivalent stiffness,equivalent viscosity coefficient and loss factor were measured under different loading schemes to study the regularity of thespring-damping anti-vibration bearings. The influence of the mechanical properties of the bearings on displacementamplitudes and loading frequency were studied. The hysteretic curves of the spring-damping anti-vibration bearing werecalculated and fitted with Kelvin model. The fitting results were compared with the experimental results. The results showthat spring-damping anti-vibration bearings exhibit full hysteresis loops and stable mechanical properties, the energydissipation capacity is good. The influence of loading frequency on equivalent stiffness and equivalent viscosity coefficient isobvious. The displacement amplitude has a significant influence on damping energy dissipation and loss factor of thebearing, the excitation frequency has a slight impact on these mechanical properties. The properties of the spring-dampinganti-vibration bearings can be simulated effectively by Kelvin model.
Keywords:spring-damping anti-vibration bearing; cylinder-type viscous damper; cylindrical helical spring; frequencydependence; displacement amplitude dependence;cyclic loading dependence
∗國家自然科學(xué)基金(51878191) ,廣州大學(xué)全日制研究生基礎(chǔ)創(chuàng)新項目資助(2020GDJC-M41) .
第一作者:任紅霞,碩士研究生,主要從事結(jié)構(gòu)減隔振(震)設(shè)計研究,Email:951180453@ qq. com.
[引用本文] 任紅霞,區(qū)彤,汪大洋,等. 彈簧-阻尼減振支座性能試驗研究[ J] . 建筑結(jié)構(gòu),2022,52( 5) :48-54.REN Hongxia,OU Tong,WANG Dayang,et al. Experimental study on properties of spring-damping anti-vibration bearings[ J] . Building Structure,2022,52(5) :48-54.
