囊式分子弹簧隔振器力学性能分析  

Analysis of Mechanical Properties of Bag-Type Molecular Spring Vibration Isolator

作　　者：金阳 陈卫东[1] 陈前[1] 滕汉东[1] JIN Yang;CHEN Weidong;CHEN Qian;TENG Handong(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics Nanjing,210016,China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016

出　　处：《振动．测试与诊断》2023年第2期240-245,406,共7页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(11472127)。

摘　　要：结合囊体变形分析和水分子侵入疏水微孔的过程,建立了囊式分子弹簧隔振器的力学模型,推导了隔振器受力过程的力-位移关系,采用准静态试验验证了力学模型,并通过仿真和试验分析了隔振器性能的影响因素。结果表明:理论与试验结果一致性较好;囊式分子弹簧隔振器表现出高-低-高的分段刚度特性,且阶段Ⅱ刚度较阶段Ⅰ有极大降低;微观层面的孔径、接触角、孔容积以及宏观层面的材料用量和氯化钠溶液浓度等参数均会对隔振器阶段Ⅱ产生影响,调整这些参数可以灵活调节隔振器性能,适应不同的工程需求。Combined with the deformation analysis of the capsule and the process of water molecules invading the hydrophobic microholes,the mechanical model of the molecular spring isolator is established,and the force displacement relationship of the isolator is deduced.The mechanical model is verified by quasi-static test,the influence factors of the performance of the isolator are analyzed by simulation and experiment.The results show that the theoretical and experimental results are in good agreement.The molecular spring isolator exhibits high,low and high segmental stiffness,and the stiffness of the stageⅡis greatly reduced compared with that of the stageⅠ.The parameters such as pore diameter,contact angle and pore volume at the micro level,material consumption and sodium chloride solution concentration at the macro level have an impact on the stage II of the vibration isolator.Adjusting these parameters can flexibly adjust the performance of the vibration isolator and adapt to different engineering needs.

关 键 词：囊式 分子弹簧 分段刚度 隔振 

分 类 号：TB535[理学—物理]