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（1 南京工大建設(shè)工程技術(shù)有限公司， 南京 210000； 2 南京工業(yè)大學(xué)土木工程學(xué)院， 南京 211816）
［摘要］設(shè)計(jì)并加工了3個(gè)結(jié)構(gòu)參數(shù)相同、但采用三種不同黏滯液的間隙式黏滯阻尼器，并對該3個(gè)黏滯阻尼器進(jìn)行不同加載頻率下的低周往復(fù)試驗(yàn)和抗疲勞性能試驗(yàn)。根據(jù)試驗(yàn)結(jié)果，分析了黏滯阻尼器的滯回性能，得到了相應(yīng)的等效耗能系數(shù)、阻尼系數(shù)及阻尼指數(shù)。研究結(jié)果表明，間隙式黏滯阻尼器滯回曲線飽滿，在小位移階段便可有效耗能；阻尼系數(shù)隨著黏滯液運(yùn)動黏度增加而增大，阻尼指數(shù)隨黏度增加而減小。該3個(gè)黏滯阻尼器歷經(jīng)30次往復(fù)循環(huán)加載，阻尼力均未出現(xiàn)衰減，具有較好的抗疲勞性能；Maxwell模型與該黏滯阻尼器的試驗(yàn)結(jié)果吻合良好。
［關(guān)鍵詞］間隙式黏滯阻尼器； 黏度； 滯回曲線； 阻尼指數(shù)； Maxwell模型
中圖分類號：TU352-1文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)21-0093-06
Experimental study on mechanical performance of clearance viscous dampers with different damping fluids
Miao Miao1, Xu Weizhi2, Wang Shuguang2, Du Dongsheng2
(1 Nanjing Gongda Construction Technology Co., Ltd., Nanjing 210000, China; 2 College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China)
Abstract:Three clearance viscous dampers were designed and manufactured with same structural parameters and different damping fluids. The low-cycle reciprocating test and fatigue resistance test of these three types of viscous dampers under different loading frequencies were carried out. The hysteresis characteristics were analyzed and the equivalent energy dissipation coefficients, the damping coefficient and the damping exponent were derived and fitted according to the experiment results. The results show that the clearance viscous dampers get full hysteresis curves and can effectively dissipate energy at small displacement stage. With the increase of kinematic viscosity of the viscous fluid, the damping coefficient increases and the damping exponent decreases. The damping force doesn′t attenuate after 30 reciprocating cycles of loading, indicating that these three dampers get good fatigue resistance capacity. The experimental results are in good agreement with Maxwell model.
Keywords:clearance viscous damper; viscosity; hysteresis curve; damping exponent; Maxwell model
*國家自然科學(xué)基金（51678301，51678302，51808291）。
作者簡介：苗苗，學(xué)士，助理工程師，Email:miaomiaojoe@sina.com。
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