Damage Decoupling Analysis of Pump Truck Structure on Multi-Load

Abstract

Selecting a typical four-boom pump truck, the characteristics of the boom structure system and load were analyzed. The calculation model of boom structural damage was established and the calculation process was carried out based on MATLAB. In actual conditions, the strain-time signal of the four-boom structure was tested and the impact of multi-load on the boom structural damage was analyzed by decoupling method. Studies show that the strain-time history of a pump truck is a random process. It is mainly composed of two parts. One part is the overall and slow wave caused by boom posture changing. Another part is the rapid fluctuation caused by intermittent pumping. The damage caused by arm posture changing is dominant in the total damage, and the damage caused by intermittent pumping is secondary. The results reveal the composition of pump truck structure's damage. It can provide strong support for the rational formulating of fatigue test program, structure optimum design, methods selecting of structural health monitoring and safe use of pump truck.

A Large-Scale Multibody Manipulator Soft Sensor Model and Experiment Validation

“…The method is based on geometrical and dynamic knowledge by estimating the boom failure through a self-learning program. And the stress signals are got by pasting sensors onto the structure [1,2]. Cazzulani et al selected a 4-section boom mobile concrete pump truck and analyzed the load characteristics of them.…”