当今,机械产品在高速化、高性能化、大型化、轻量化方面的要求越来越高,同时,对安全性的要求也与日俱增。因此,疲劳强度问题成为影响机械产品使用可靠性和使用寿命的一个关键问题。由混凝土泵车工作状态所决定,其构件的损坏多为疲劳破坏所致。但是,我国混凝土泵车各构件的设计仍处在静强度设计阶段。这样设计出的产品有些部分裕度太大,而有些部分却又经常发生疲劳破坏。影响该产品结构疲劳设计推行的主要原因是:缺乏足够的疲劳试验数据及疲劳设计经验。从I H I公司提供的设计 Today, mechanical products have become increasingly demanding in terms of speed, performance, size, and weight. At the same time, the requirements for safety have also increased. Therefore, the fatigue strength problem has become a key issue that affects the reliability and service life of mechanical products. Due to the working condition of the concrete pump truck, the damage of its components is mostly caused by fatigue damage. However, the design of each component of the concrete pump truck in China is still in the stage of static strength design. Some parts of products designed in this way are too marginal, and some parts are often fatigued. The main factors affecting the structural fatigue design of the product are: lack of adequate fatigue test data and fatigue design experience. Design from I H I company