【摘要】 构建了一种膜式空气弹簧的有效面积预测模型，以便研究膜式空气弹簧的退化机理，预测在全生命周期内膜式空气弹簧的动态响应。引入了帘线和橡胶材料疲劳特性的演化机制，建立了空气弹簧有效面积随疲劳加载周期与受力形变的激励振幅的多物理耦合映射关系；在不同疲劳周期和形变的激励振幅下，进行了动态试验验证。结果表明：在不同退化阶段下，本模型的有效面积计算误差在1%以内；空气弹簧有效面积与疲劳加载次数、形变的激励振幅均呈正相关关系，而与帘线和橡胶材料的弹性模量呈负相关关系；在50℃时有效面积的增长趋势加快，呈现非线性特征。更多还原

【Abstract】 An effective area prediction model was built based on composite material theory and fatigue degradation mechanisms to predict the dynamic response behaviors of rolling-lobe air springs over their full lifecycle. The evolving fatigue characteristics of cords and rubber materials were introduced to establish a multiphysical coupling relationship, in which the effective area was modeled as a function of the fatigue cycles and the deformation excitation amplitude under force. Dynamic validation tests were carried out under different fatigue cycles and deformation excitation amplitudes. The results show that the model prediction error is within 1% at different degradation stages. The effective-area increases with both the fatigue cycles and the deformation excitation amplitude; but decreases with the elastic modulus of the cords and the rubber materials. The effective-area growth trend at 50 °C accelerates and exhibits nonlinear characteristics.更多还原