Papers by Author: Yu Qing Zheng

Abstract: The rigid frame joint node is rigid node. And each rod can not only withstand the tension- compression load, but also can bear the bending. For the complicated rigid frame, to work out every rod internal stress by artificial calculation is difficult. In ABAQUS, the wire model can be built to simulate the real rigid frame. After setting the attributes, loads, grid, computing parameters in the wire model, the reaction force, internal stress and deformation can be output in graphic. Then according to the relevant codes, the simulation results can be used to check the strength of rigid frame. It is verified that for analyzing the rigid frame strength, the modeling was convenient and results were accurate in ABAQUS, which greatly improved the work efficiency.

Abstract: This paper describes the selection of calculation method of ABAQUS software in the bearing’s assembly process through the establishment of the engine body, the bearing cap, the bearing and other parts of the three-dimensional FEA model [1], using three different loading methods of main bearing over surplus and studying the application of the assembly process of marine diesel engine’s bearing calculation method.

Abstract: This article discussed the offshore platform deck crane fatigue performance with the finite element method. In Abaqus Fatigue Module, the fatigue strength analysis for the offshore platform deck crane was executed. Based on the fatigue simulation results and the material S-N curve, we made a reliable assessment of the offshore platform deck crane fatigue life. This fatigue analysis procedure can be easily used for optimizing the deck crane structure and reducing the maximum stress amplitude till to meet the engineering design specification.

Abstract: When the nuts are tightened on the big bore diesel engine through the hydraulic tensioner, the preloaded forces imposed on the studs are often less than the design values. In order to get the difference, finite element method was introduced and stress analysis was implemented in Abaqus. Meanwhile the finite element model was modified based on the real test result. Eventually reliable difference results were obtained and the modified model could be applied in the other research.

Abstract: This paper mainly introduced one kind of new E-shape Steel Damper structure performance. The finite element method was applied in the E-shape Steel Damper structure performance evaluation. The damper model was set up and stress analysis was executed to predict the stress distribution under the working load in Abaqus. Besides, the real test in lab was accomplished to determine the site where the destruction took place and the reason why it happened. The test result verified that the simulation was correct and reliable. Study on the E-shape Steel Damper performance based on above both methods revealed that excessive plastic deformation was the main factor to cause the damper destruction to occur.

Abstract: Based on the Pro / E 3D modeling technology and combined with the force decomposition and transmission principle, this paper used the connecting rod mechanism to achieve a creative guardrail structure design with the cushioning function. Aiming at the phenomenon that small cars burst from the side into the bottom of heavy vehicles on the highway and cause the small cars’ passengers deadly damage, according to GB11567.1-2001 official requirements, the author innovatively designed a new structure of side crash barrier for heavy vehicle. In summary, the design of collision avoidance principle and creative structure design were briefly introduced in this paper.

Abstract: Based on the UG, the parametric model of the precision press working mechanism was built and its kinematic simulation analysis was implemented in this paper. The research results can be applied for the precision press working mechanism design [1], which can shorten the product development cycle and reduces the test cost.

Abstract: This article took the PC main board as a research object and simulated how to optimize the position of the desktop main board pads. The static stress analysis was executed using ABAQ -US/Standard. The objective was to reduce the local deformation of computer main board occurs when the connector was inserted and extracted during the assembly process, preventing the chips and capacitances on the main board from becoming invalid. The simulation results showed that the FEA method with Abaqus can be used to predict the main board performance and structure optimization.

Abstract: This paper establishes a numerical procedure to predict the aluminum wheel performance during the impact test. The dynamic finite element solver, Ansys-Lsdyna970, is used. In order to save the computation time, the striker is assigned with an initial velocity, which is equal to the velocity reached during the free-fall period upon release. Mass scaling method is also utilized to further reduce computational time. Equivalent plastic strain is used as the damage indicator to judge pass or fail for the dynamic impact test. The true stress-strain curve is obtained from a uni-axial tensile test of A356-T6 samples machined from a prototype wheel. Simulation results show that plastic deformation tends to be localized around spoke-to-hub junction area. Studies on a recent prototype wheel revealed good correlation between experimental results and numerical prediction.

Abstract: The methodologies and application of hybrid multi-mode positive impulses input shaping of a 3-DOF flexible parallel manipulator in this paper. First, the structural system and the dynamic equations are expressed for a 3-DOF manipulator. Second, the hybrid multi-mode positive impulses input shaping is introduced to reduce the residual vibration of the multi-mode system or to decrease the time-delay of the system response at the same time. The theory of the hybrid multi-mode positive impulses input shapers are presented, and the hybrid two-mode positive impulses input shapers of a 3-DOF manipulator are established and compared with the classic multi-mode positive impulses input shapers. Finally, the numerical simulations are made, and the robust of the input shapers are presented and compared.