Research And Application Of Key Technology Of Operating System For Emergency Rescue

With the rapid development of emergency rescue project equipment,the society has the demand for the engineering machinery with emergency rescue function.The excavation work device is the key component of the multi-function engineering machinery such as excavation,lifting and loading operations.The performance of the excavation work device determines the merits of the whole work performance of the emergency rescue vehicle.Therefore,the modern design method applied to the dynamic characteristics of the excavation work device is very necessary.In this paper,the excavation operation device of an emergency rescue vehicle is taken as the research object,and the dynamic characteristic simulation and the optimization of key components are carried out.The main research is as follows:(1)Denavit-Hartenberg homogeneous coordinate matrix transformation method and Kane-Huston method are used to establish the kinematic and dynamic mathematical model of the excavation work device,and the relevant kinematic parameters of the key points are obtained: displacement,velocity and acceleration,and so on,and multi-body system dynamics equation.(2)The UG and ADAMS software were used to establish the three-dimensional model and the virtual prototype model of the emergency rescue work vehicle excavation work device.Through the kinematics and dynamics simulation of the rigid body virtual prototyping model,the excavation envelope of the excavation work device,the main operation size parameters and the variation curve of the main hinge force of the excavating work device are obtained.(3)The ANSYS is used to analyze the constraint modes of the boom and arm of the excavation work device respectively,and the first six order natural frequency and its vibration pattern of the boom and the bucket are obtained.In ANSYS,the stiffness is small and the external load Easy to produce a large elastic deformation of the boom and arm flexible treatment,the introduction of ADAMS replacement rigid body to establish the excavation work device rigid-flexible coupling dynamics model,the dynamic stress-strain curves of the maximum stress nodes of the boom and arm are obtained by the dynamic simulation analysis,which provides the basis for the strength checking of the both.(4)Based on the simulation results of the boom and the rigid-flexible coupling dynamics,the static finite element analysis of the boom is carried out.The hyperworks topology optimization module is used to establish the objective function as the minimum flexibility of the boom and the constraint function is the optimized topological optimization Model,to achieve the goal of lightweight boom.