橡胶沥青性能影响因素试验研究

基于室内试验研究,总结分析了胶粉目数、胶粉掺量、基质沥青种类以及橡胶沥青加工工艺等因素对橡胶沥青性能的影响。     

中水在日照港粉尘治理中的应用

为切实搞好环境保护工作,达到节能减排效果,日照港于2007年9月开始建设中水工程.介绍了日照港工业用水需求情况和中水回用的优势.具体介绍了日照港中水工程的建设情况和中水在粉尘治理中的应用.该工程取得了良好的经济效益和社会效益.     

粉煤灰和胶粉改性沥青的试验研究

利用粉煤灰和胶粉对基质沥青进行改性,以期得到粉煤灰和胶粉的合理用量。通过室内试验,根据不同工艺条件下生产的胶粉沥青的性能,确定胶粉沥青的生产工艺,包括剪切温度、剪切时间、生产工序;分析了不同胶粉粒径、用量和粉煤灰用量对改性沥青针入度、低温延度、软化点和弹性恢复的影响,从而确定了影响改性沥青性能的胶粉粒径、最佳胶粉用量和粉煤灰用量。     

基于流变性的沥青胶浆老化性能研究

为了研究老化对沥青胶浆流变性能的影响,采用了黏度试验及动态剪切试验,测试了不同老化状态(0 h,10 h,20 h,30 h)下沥青胶浆的流变性数据,同时选用不同的粉胶比(0,0.4,0.8,1.2,1.6,2.0)作为对比试验.通过对实验数据的分析,得出了不同老化状态和不同粉胶比对沥青胶浆老化性能的影响.     

提高橡胶悬置装配状态下刚度的稳定性

在对某型动力总成—橡胶悬置系统进行模态试验时,发现橡胶悬置的装配状态对刚体模态频率影响较大。针对该橡胶悬置结构进行了研究,找到了影响橡胶悬置装配后刚度特性的因素,并提出了改进方案。改进后的结构消除了装配状态对动力总成—悬置系统振动特性的影响,提高了悬置刚度的稳定性,对改善整车振动与噪声性能有一定的作用。     

Fluid-structure-material coupling analysis for a floating laminated structure consisting of high-stiffness panels and a soft core

This paper presents a fluid-structure-material coupling analysis for the interaction between water waves and a very large floating laminated structure (VLFLS), which is consisted of two enhanced ultrahigh-performance concrete (UHPC) panels and a middle lightweight foamed rubber core. The representative volume element (RVE) method is used to design the mechanical properties of enhanced UHPC and foamed rubber, and the parameterized formulas are presented to reveal the dependency between macroscale mechanical properties and mesoscale hierarchical characteristics. By idealizing the rubber core as a uniformly distributed spring layer, an eighth-order differential equation of motion of the laminated structure is derived. In the context of linear potential flow theory, a hydroelastic analytical model is developed for the floating laminated structure with finite length under wave action. In the process of solving velocity potentials, a complicated dispersion equation for the wave motion below the laminated structure is derived, and this equation contains two pairs of conjugate complex roots with positive real parts. The various hydrodynamic quantities, including reflection coefficient, transmission coefficient, deflection, shear force, and bending moment, are calculated. The hydroelastic model is confirmed by considering the convergence of calculation results and the energy conservation of wave propagation. The coupled effects of wave action, material characteristics, structural parameters, and edge conditions on the hydroelastic and mechanical response of the floating laminated structure are clarified to provide important information regarding the optimal design of such structures.