Design And Kinematic Characteristics Research Of Bionic Suspension System For High-Speed And Heavy-Duty Emergency Rescue Equipment

The global situation of natural disasters is complex,with extreme disasters occurring frequently,frequently and unexpectedly.The existing rescue equipment has a variety of types,single functions and is mostly transformed from traditional engineering machinery.Its carrying capacity,mobility and comfort deviate in landslide,earthquake and other disasters,as well as extreme working conditions such as swamp and beach,which makes it difficult to meet the requirements of fast transportation,thus delaying the rescue time.Because of the complex geographic and topographic conditions in the use of scenes,severe vibration will occur during the operation of emergency rescue equipment.Traditional vibration reduction schemes have some problems,such as poor working efficiency in extreme environment,high noise in the work process,and poor ride comfort,which will adversely affect the working efficiency,environmental adaptability,protection of precision instruments,health and mental status of drivers.Based on the characteristics of natural disaster accidents in China,this paper designs a high-speed and heavy-duty emergency rescue equipment and equipped with bionic suspension system to solve the problems caused by severe vibration of the above terrain emergency rescue equipment for multi-disaster and multi-working conditions.The main research work in this paper includes:(1)To meet the needs of emergency support work for multiple disasters and working conditions,a high-speed and heavy-duty emergency rescue equipment with a load of 30 tons and a land speed of 50 km/h is designed to give full play to its advantages of large load carrying capacity,strong operational mobility and no terrain restrictions,and efficiently serve disaster relief,medical rescue,material transportation and other work.(2)Starting from the principles of bionics and biomechanics,this paper explores the internal relationship between the biological cushioning characteristics of rhinoceros and kangaroos in nature and the application performance of the suspension system of high-speed and heavy-duty emergency rescue equipment,such as high speed,heavy load,and strong impact resistance.Combined with the mechanical principles,a set of bionic suspension system with compact structure and strong impact resistance is studied to provide an efficient,reliable,adaptable impact resistance strategy and body protection mechanism,Respond to the emergency support work needs of high-speed and heavy-duty emergency rescue equipment in complex terrain.(3)The kinematics mathematical model of the bionic suspension system is established by using the modified D-H parameter method combined with geometric principles,and a numerical example of the frame output position coordinates is given.Based on numerical examples and combined with Creo,a three-dimensional model is established,and its position is simulated and analyzed to verify the rationality of the numerical examples.Since the error of simulation results and theoretical calculation is within 1%,the kinematics analysis of the corresponding angular displacement,angular velocity and angular acceleration of each bionic component with time is carried out through Creo 3D model to study the stability of the suspension system in the movement process.(4)Optimize the angle,size,and other parameters of the bionic suspension system’s bionic components,analyze the smoothness of the motion trajectory under each corresponding parameter,and obtain the more suitable parameters of the bionic suspension system’s structural components after optimization,providing reliable data and theoretical support for the final processing,control,and actual vehicle testing work.The research results show that the high-speed and heavy-duty al-terrain emergency rescue equipment designed in this paper has the characteristics of large bearing capacity,strong operational mobility,and is not limited by terrain.The matching bionic suspension system has good running stability.The bionic suspension system described in this article can help improve the efficiency of research and design of vibration damping systems,reduce research costs,and provide useful reference for other vibration damping system research.