摘要
研究变刚度床垫中所使用的空气弹簧刚度特性及影响因素,空气弹簧是一种在使用过程中通过调整某些参数能够改变其刚度的弹簧结构。应用准静态力学试验研究了空气弹簧的气囊层数、形状、初始气压、材料编织层密度对其载荷-位移关系及刚度特性的影响。研究发现空气弹簧刚度曲线按照位移占弹簧总高度的比例可分为线弹性阶段与超弹性阶段2个具有不同刚度变化特征的阶段;空气弹簧的层数与刚度为负相关关系;空气弹簧的初始气压在线弹性阶段与刚度为正相关关系,但在超弹性阶段二者为负相关关系;空气弹簧的材料编织层密度与刚度为正相关关系。通过调整空气弹簧的初始高度、有效接触面积、气压与材料可以控制空气弹簧的刚度曲线,为空气弹簧设计及其在变刚度床垫上的应用提供实验依据。
Air spring is a kind of spring structure that can change its stiffness by adjusting some parameters during use.The stiffness characteristics and influencing factors of air spring used in variable stiffness mattress were studied.The ef‐fects of the number of airbag layers,shape,initial air pressure and material braid density on the load-displacement rela‐tionship and stiffness characteristics of air spring were analyzed by quasi-static mechanical experiments.It was found that the stiffness curve of air spring can be divided into linear elastic stage and superelastic stage according to the ratio of displacement to the total height of the spring,which have different stiffness characteristics;There is a negative correla‐tion between the number of layers and the stiffness of the air spring;The initial air pressure of the air spring has a posi‐tive correlation with the stiffness at the linear elastic stage,but a negative correlation at the hyperelastic stage;The densi‐ty of the material braid of the air spring has a positive correlation with the stiffness.The stiffness curve of the air spring can be controlled by adjusting the initial height,effective contact area,air pressure and material of the air spring,which provides experimental basis for the design of the air spring and its application on the variable stiffness mattress..
作者
闫儒凡
申黎明
晁垚
YAN Rufan;SHEN Liming;CHAO Yao(College of Furnishings and Industrial Design,Nanjing Forestry University,Nanjing 210037,China)
出处
《家具》
2023年第6期61-64,74,共5页
Furniture
基金
国家重点研发计划(2016YFD0600704)
江苏省研究生科研创新计划(KYCX20_0859)。
关键词
变刚度床垫
空气弹簧
弹簧刚度
力学性能
variable stiffness mattress
air spring
spring stiffness
quasi-static mechanical properties
