Explicit Nonlinear Dynamic Analysis And Energy Absorbing Structure Research Of The STS Crane Collision

Due to the strong wind action,Port rail crane collision with large kinetic energy causes derailing capsizing and catastrophic damage,which causes huge economic losses to the port.In this paper,it’s suitable for the practical engineering problems to use explicit nonlinear dynamic analysis capabilities of ABAQUS.We can according to different collision conditions perform crane simulation modeling and analyses.The crane which under the strong wind will glide along a track,then crash into other cranes or the end stop device at different speeds.This paper has analyzed the crashed trolley’s deformations,stress distribution and displacement,etc.This paper has confirmed the hazardous locations where the parts are connected by the trolley and frame.By rational designing energy-absorbing structure and optimizing trolley structure to reduce the damage to the hazardous locations caused by the collision.Thereby ensuring the derailment overthrow accident does not occur in the crane collision.This paper provides the theory and technical supporting to avoid collision of port crane and reduce the losses caused by the crane collision.The main research content are as follows:This paper introduces the principle of non-linear finite element method to analyze the advantages of ABAQUS explicit nonlinear dynamic analysis be used to simulate the impact of collision and explosions.Then it builds a mathematical model of the crane collision’s large deformation.A suitable mathematical model for crane collision problem combined with the basic equation described by the dynamic nonlinear theory with different impact conditions is developed.These ideas and simplified principles which are used for building a simplified model are introduced detail.Based on the simplified principle to set up the 3D model that is close to the actual crane.The component’s material properties are set based on the low-carbon steel tensile test data.This article meshes this finite element model referencing to the existing meshing principles used in literatures.It sets the contact properties according to the crane actual operation.Finally,it calculates and analyzes the stress of the model to determine the initial velocity field when collision occurs between models.All the settings,calculations and tests for modeling in this paper are selected to ensure that finite element analysis simulation scenarios as realistic as possible,to ensure the accuracy of the simulation of the entire collision.Using the software ABAQUS to solve the collision model,we can get the stress and displacement nephograms,and the stress and displacement curves of the measuring points under different working conditions.Comparing the influences of different collision speed to the result of the collision under the same working condition,It is found that the areas of trolley and frame are connected and the joints of secondary structure and superior structure of trolley are the dangerous sections in the collision.The yield failure and even rupture of those dangerous sections’ material are the important causes of crane collision damage.Finally,this paper introduced the significance and necessity to reduce port cran e collision by impact energy absorbing passive protection.Introduced the related conte nts in the field of car impact energy absorbing and compared STS to a special "car",re lates with car impact energy absorbing method and experience.Impact energy absorb ing structures are developed accordingto the related theory of design for STS buffe r energy absorbing structure,Comparison of the two collision simulation working c ondition of the same collision condition show the impact energy absorbing structure i n the process of STS have positive role.Finally,made a thorough inquiry the theor y of stress wave on the design of the buffer energy absorbing structure.