Analysis Of The Stability And Main Influencing Factors On A45 Articulating Boom Lifting Vehicle

As an important construction equipment in the mechanical field,the articulating boom lifting vehicle has the characteristics of being flexible,suitable for narrow sites,high working efficiency and high safety,and has a wide application prospect.When the aerial working vehicle is in operation,it will encounter such situations as excessive load,foundation collapse,uneven road surface and excessive working slope,which may cause the work vehicle to tip over or partially destabilize,causing a safety accident.Therefore,it is especially important to analyze the stability of aerial working vehicles.In this paper,for the A45 articulating boom lifting vehicle,the whole machine anti-overturning stability and its main influencing factors were analyzed,the stability of the operation and its main influencing factors were analyzed,the collision stability analysis was analyzed and the speed solution interface was designed.At the same time,the modal and buckling analysis was carried out for the telescopic arm.The paper mainly carried out the following work:(1)In the forward tilting,backward tilting and lateral state,the moment equilibrium method was used to calculate the safety factor when the working platform of the articulating boom lifting vehicle is extended to the maximum working height as well as the farthest working radius.It shows that the safety factor is greater than 1,and the stability meets the standard.Based on the analysis of the influence of chassis wheelbase and wheelbase on stability,the relationship curve between wheelbase and wheelbase and platform load is obtained,and the minimum values that can be taken when stability requirements are calculated.(2)In order to analyze the impact of deployment method and operation sequence on stability,based on ADAMS software,it was simulated that the whole motion of the vehicle from the limit retracting state to the limit extension state,introduced the centroid trajectory solving program,and combined the MATLAB software to draw the centroid curve during the deployment of the working arm.The analysis shows that the vehicle has good stability during the unfolding operation,and the sequential expansion from bottom to up-first-unfolding to post-extension can further improve the stability during the unfolding process.(3)By calculating the kinetic energy and potential energy of the work vehicle when it hits the curbstone,it shows that the collision stability under the limit state meets the requirements,and the relationship curve between speed and centroid is obtained.Based on the establishment of the kinematics equations,a maximum speed solution interface that satisfies the collision stability was developed and designed based on MATLAB software.Entering the relevant parameters can get the maximum speed at which the work vehicle collides with the curbstone without instability,which is helpful to improve the engineering practice In collision stability.(4)Based on ANSYS software,the modal analysis of the telescopic boom structure of the working vehicle was carried out.The vibration mode and natural frequency of the first six modes were compared,which indicates that the telescopic arm does not resonate with the walking excitation of the engine and the staff.The buckling analysis of the telescopic boom structure under the two extreme conditions shows that the buckling safety factors are 28.504 and 12.119,respectively,both of which are greater than 1,which meet the requirements of buckling strength.The analysis provides theoretical guidance for avoiding resonance and buckling damage during operation.