Static And Dynamic Analysis And Optimization Of Heavy Moveable Aerial Work Platform

Heavy moveable aerial work platform has many nodes, hinge points, working positions. It is subjected to complicated forces, shear stresses and is mostly operated in windy and sandy conditions. In this paper, the aerial work platform has features such as long arms, heavy loads and small deformation. It is designed strictly by real operating conditions and has high economic values.Based on the analysis of the whole structure and operating condition of the stretchable arm, this paper gets the force condition under different operating conditions by static stress calculation. Real body model is developed by finite element analysis software ANSYS12.0. It divides the arm into 87892 unites, performs finite element analysis and determined the dangerous cross section and stress concentration positions. It provides great references to structure optimization..In the trouble shooting process of a crane, a key factor is the stability failure. By considering the friction between the arms, this paper derives the stability equations for the stretchable arms, analyzes the trapezia cross section qualitatively and quantitatively, and considers the influence of friction of oil tank and the difference of critical force of the unstable arm.Modal analysis is performed, and based on the ANSYS platform, the structure model is extracted. The first fifteen modes are got, and the features of the modes and reasons for the optimization design.Based on the finite element analysis of the stretchable arm, under the premise of guaranteeing the strength of the arm, setting the area of the arm as a function, by the optimizing feature of ANSYS, optimization design is done to the main structural parameters of the arm. After the optimization, the area of the stretchable arm is significantly reduced, thus saved materials and reduced the cost.