Papers by Keyword: ANSYS/LS-DNYA

Abstract: Underwater blasting as an important part of engineering explosion processes engineering characteristics which contains a wide applied range, high technical requirement and complicated measurement and etc. Based on a project item on underwater explosion conducted by port department in Guangzhou, This paper has studied and simulated underwater explosion on multiple models under different conditions. Further more, the relation among major variables is quantized and the influence caused by certain variables comprehensively is elaborated. The research results may offer the guidance for similar projects.

Abstract: Introducing the grinding mechanism of axial creep-feed grinding ceramics with a single diamond grain. Establishing the simulation model of a single grain grinding engineering ceramics by axial creep-feed grinding and analyzing the simulation results of the grinding force in the X,Y,Z axis. Finally, the impacts of the wheel speed, axial feed rate and workpiece speed upon grinding forces were discussed by simulating the single diamond abrasive grinding process under different grinding conditions.

Abstract: Based on research on the knitting processes, an impact mechanic model for knitting elements was established to investigate the variation of the impact force in vertical direction between the cam and the select jack. The variation of the displacement, velocity, acceleration of the select jack and the stability for the needles’ moving has been confirmed by the simulation of knitting process based on the software ANSYS/LS-DYNA. Furthermore, the variation of the select jack has been confirmed by experimental measurement during the knitting process. The data of the experiment results were in accordance with the ANSYS’ simulation which verified the correctness of the ANSYS’ analysis. It provided a theoretic basis for the design of computerized flat knitting machines.

Abstract: Using the finite element software ANSYS/LS-DYNA for the universal rolling machine to simulate,research unit of the universal rolling deformation etc, and the use of universal mill for heavy rail rolling to simulate of lead samples, study of both. By comparing experimental results, the results show rolling simulation of laboratory lead samples and finite element simulations of computer are basically the same, use the universal pass, the difference of pressure coefficient for the rail head and rail base and rail back that work on the workpiece at the universal pass is small, deformation of workpiece is uniformity, it ensure the dimensional accuracy of the finished rail on the rail section.

Abstract: Cutting part is a key part of machine for cutting mulberry branch. The cutting part structure could influence quality and efficiency of machine for cutting mulberry branch, directly. To obtain a suitable cutting part structure, research of cutting part of machine for cutting mulberry branch is implemented in this paper. Firstly, the stress situation of mulberry branch is analyzed through different cutter blade shape. A kind of cutter blade shape is got from the analysis result. Then this kind of cutter is used to build a cutting model. The cutting model is used to make dynamics simulation for the cutting process and analyze the cutting process through the ANSYS/LS-DYNA software. The curve figures got from the simulation result also provide certain reference for the design of cutting part.

Abstract: An accurate finite element contact analysis of helical gears was done directly under ANSYS, while the integrated elastic deformation of the meshed teeth was extracted directly from the finite element contact analysis results, and considered as the main basis of the amount of tooth profile modification. Linear, conic, cubic, and sine relief curve are compiled and established in MATLAB, on which gear models of two ways of modified gear are built. Under the same modified parameters, contact method is used on the proposed finite element models of gears by software LS-DYNA, and the effect of the two ways of gear relief on contact force on teeth face is analyzed. The results show that the effect of a pair of gears relief is better than one gear relief for linear and conic relief curve, and the effect of one gear relief is better than a pair of gears relief for cubic and sine relief curve. So dynamic simulation on modified involute gears has great significance for reducing contact force of teeth face of gears.

Abstract: In the process of drilling well, the kinematics of drill string is quite complicated. The drill string not only vibrates in longitudinal, transverse and torsional direction, but also random impacts and contacts well wall. Considering the random load of drill bit and rock, contact impact of drill string and well wall, a model is proposed to simulate the contact-impact of drill string and formation. The results show that: in the condition of this article the first principal stress of the drill string can reach to 130 MPa, for the random impacts, the strength of drill collar will reduced under cyclic loading; contact-impact is the principal source of drill premature failure. In this paper, an explicit integration and nonlinear finite element was adopted to simulate the collision between the drill string and formation, the process of the collision between the drill string and formation can be revealed compressively and delicately. Through an example, we can obtain the foundation for nonlinear dynamic theory of drill string system collision in the actual work condition, and has important theory significance and academic value.

Abstract: The numerical simulation that projectiles, which are different length-diameter ratio, different cone angle, penetratethe same steel target is executed with ANSYS/LS-DYNA. The environmental characteristics are summarized. It provides a reference for the instrument on projectiles.

Abstract: Using ANSYS / LS-DYNA to study the dynamic response of square steel tube beam filled with steel-reinforced high-strength concrete under impact loading at different speeds. The numerical simulation results show that: At different conditions of speed, the concrete failure modes are different. The combined action of Steel tube and steel flange makes the stress wave propagation extremely complex in the beam, when the speed increased to a certain value, it made damage to the internal steel flange and flange lateral concrete under impact load, while the concrete between the top of steel flange and steel tube was protected by the combined action.

Abstract: In return for the collision response of bridge girder with shearkey subjected to seismic loads, a simplified dynamic model has been built by using the finite element analysis program Ansys/Ls-dyna. Based on the analysis of calculation results, the motion feature of this model is unfolded. Also, the stress response and characteristic at the bottom of shearkeys are analyzed, which are the most important parameters reflecting the cracking of shearkeys. Furthermore, the deformation of rubber bearing is elaborated to illustrate the collision of bridge girder with shearkeys. Finally, other key properties about the bridge girder of this collision system are addressed.