中文摘要：

为研究平衡悬架钢板弹簧离散梁单元模拟模型的精度，建立了3种典型重载车辆常用平衡悬架模型。同时采用平衡悬架刚度经典计算方法，计算3种悬架的刚度。对比分析离散梁单元法和经典方法垂向刚度计算结果，发现离散梁单元法模拟结果较理论计算结果大55％左右。分析误差产生原因，提出误差修正方法。修正之后的模型垂向刚度与理论刚度相比，偏差在5％以内。该修正方法为离散梁单元建模的推广应用，同时也为建立符合实际力学性能的钢板弹簧模型提供了条件。

英文摘要：

To study the precision of the discrete beam model of the balance suspension leaf spring, the models of three kinds of heavy vehicle balance suspension are set up.And the stiffness of the balance suspensions is also calculated in the classic method.Compared the calculation results of discrete beam models and classic method,it is found that the stiffness getting from discrete beam models is about 55% larger than the theoretical stiffness.After analyzing the cause of error,a correctional method is proposed.The difference between the stiffness getting from correctional discrete beam models and calculation result of classical method is less than 5%.The correction method is significant for promoting the wide use of the discrete beam method,and ensures to establish a reasonable model which conforms to the realistic mechanical properties of leaf spring.