Static and Dynamic Performance Analysis and Improvement of Pillar in Vertical Drilling Machine

2011 ◽  
Vol 48-49 ◽  
pp. 1106-1111
Author(s):  
Wei Huang ◽  
Jun Qiu ◽  
Xiao Hui Zhu
Keyword(s):  
Finite Element ◽  
Natural Frequencies ◽  
Dynamic Performance ◽  
Structural Deformation ◽  
Model Parameters ◽  
Drilling Machine ◽  
Deformation Characteristics ◽  
Pillar Structure ◽  
Dynamic Performance Analysis ◽  
Element Theory

Based on finite element theory, pillar structure of the model parameters was established, and analyzed its static and dynamic performance. At the same time, the structural deformation of pillar load and deformation characteristics were analyzed. The choosing shape method was used to get the improvements in pillar. The Improved models were done modal analysis, and got their natural frequencies.

Finite Element Analysis and Optimization of Long-Span Gantry NC Machining Center Structure

2011 ◽  
Vol 346 ◽  
pp. 379-384
Author(s):  
Shu Bo Xu ◽  
Yang Xi ◽  
Cai Nian Jing ◽  
Ke Ke Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Method ◽  
Dynamic Performance ◽  
Plate Thickness ◽  
Element Model ◽  
Wall Structure ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Dynamic Performance Analysis

The use of finite element theory and modal analysis theory, the structure of the machine static and dynamic performance analysis and prediction using optimal design method for optimization, the new machine to improve job performance, improve processing accuracy, shorten the development cycle and enhance the competitiveness of products is very important. Selected for three-dimensional CAD modeling software-UG NX4.0 and finite element analysis software-ANSYS to set up the structure of the beam finite element model, and then post on the overall structure of the static and dynamic characteristic analysis, on the basis of optimized static and dynamic performance is more superior double wall structure of the beam. And by changing the wall thickness and the thickness of the inner wall, as well as the reinforcement plate thickness overall sensitivity analysis shows that changes in these three parameters on the dynamic characteristics of post impact. Application of topology optimization methods, determine the optimal structure of the beam ultimately.

Finite Element Analysis and Optimization of Structure for Large Blanking Machine Equipment during High-Speed Blanking

2011 ◽  
Vol 697-698 ◽  
pp. 176-181
Author(s):  
Shu Bo Xu ◽  
K.K. Sun ◽  
Cai Nian Jing ◽  
Guo Cheng Ren
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Design ◽  
High Speed ◽  
Dynamic Performance ◽  
Design Stage ◽  
Beam Structure ◽  
Element Analysis ◽  
Blanking Process ◽  
Dynamic Performance Analysis

This paper reviews the background and significance to investigate the high-speed speed blanking process modeling simulation and optimization of large blanking machine equipment for CNC uncoiling, leveling and shearing line. And a powerful tool has been providing to of heavy machinery optimal design specifications. The finite element model of beam structure has been established by using a three-dimensional modeling software UG NX4.0 CAD and finite element analysis software ANSYS. Then the static and dynamic characteristics results of the whole beam structure have been simulated. On the basis of analysis results, the optimal static and dynamic performance of square cross-section of the beam structure has been obtained. Drawings at the design stage of large blanking machine equipment for NC uncoiling, leveling and shearing line, the use of finite element theory and modal analysis theory, the structure of the blanking machine static and dynamic performance analysis and prediction using optimal design method for optimization, the new machine to improve job performance, improve processing accuracy, shorten the development cycle and enhance the competitiveness of products is very important.

Timber shear walls with large openings: experimental and numerical prediction of the structural behaviour

2002 ◽  
Vol 29 (5) ◽  
pp. 713-724 ◽  
Author(s):  
Nicolas Richard ◽  
Laurent Daudeville ◽  
Helmut Prion ◽  
Frank Lam
Keyword(s):  
Finite Element ◽  
Oriented Strand Board ◽  
Dynamic Performance ◽  
Shear Walls ◽  
Dissipated Energy ◽  
Model Parameters ◽  
Nonlinear Phenomena ◽  
Structural Behaviour ◽  
Cyclic Response ◽  
Wood Frame

A numerical model based on the finite element method is presented for prediction of the cyclic response of wood frame structures. The model predicts the cyclic response of shear walls. Nonlinear phenomena are assumed to be concentrated in the connections that are modelled through elements linking the structural elements including the posts, beams, and sheathing panels. Identification of model parameters relies on tests on individual connections. Connection tests on different nail lengths were conducted under monotonic and cyclic lateral loads. Based on the results from past studies that indicate the pull-through failure is an important failure mode in common nail connections with lumber and oriented strand board (OSB), washers were considered as a means to reinforce the connection. The influence of reinforced nailing on the static and dynamic performance of full-size wood frame shear walls with large openings, sheathed with OSB panels, was evaluated experimentally. Combinations of parameters were studied, such as the number of hold-downs, the panel shapes, the nail distribution, and the bracing systems. Comparisons of the dissipated energy per cycle revealed a higher capacity for walls using nails with washer reinforcement than without. Results from numerical simulations of the monotonic and cyclic tests performed on the walls are presented.Key words: timber shear wall, connections, finite element, dissipated energy.

Modal Analysis of Large Marine Crankshaft

2012 ◽  
Vol 271-272 ◽  
pp. 1022-1026 ◽  
Author(s):  
Yang Zhao ◽  
Shou Qi Cao
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Theoretical Basis ◽  
Working Condition ◽  
Natural Frequencies ◽  
Vibration Mode ◽  
Optimized Design ◽  
Ansys Software ◽  
D Model ◽  
Element Theory

Based on the modal analysis of finite element theory, in this paper, a 3-D model is built in CATIA. And simplify the details of the characteristics and constraints depengding on working condition. The Lanczons method of ANSYS software is used in the model analysis in order to obtain natural frequencies and vibration mode vectors of the former 15 orders. And the dangerous areas is located in the crankshaft. These provide a theoretical basis for the optimized design of the crankshadft.

The Finite Element and Experimental Modal Analysis on the Rack of Batching Mixer System

2014 ◽  
Vol 490-491 ◽  
pp. 538-541
Author(s):  
Li Zhang ◽  
Zhen Zhen Zhang ◽  
Guang Yuan Nie
Keyword(s):  
Finite Element ◽  
Systems Analysis ◽  
Dynamic Performance ◽  
Modal Parameter ◽  
Element Analysis ◽  
Before And After ◽  
Left And Right ◽  
Dynamic Performance Analysis ◽  
Two Sides ◽  
Combining Methods

In this paper, by combining methods of LMS Test.Lab test systems analysis and Ansys finite element analysis on the rack of batching mixer system for dynamic performance analysis, the ODS and the modal parameter of the batching mixer machine rack is obtained. Two research methods results show that, the weakness of the rack vibration is that there is large vibration deformation on the stands of two sides and two beams above the rack. The corresponding parts need firming connection to reduce the vibration of left and right sides, before and after the rack, and improving the working stability of batching mixer machine rack. This paper provides a valuable reference for the vibration and noise control of batching mixer system.

Discuss of Structure and Finite Element Analysis of the Ultrasonic Vibration Turn-Milling Machine Tool

2013 ◽  
Vol 589-590 ◽  
pp. 740-745
Author(s):  
Li Meng Wang ◽  
Xiao Zhou Li ◽  
Jin Kai Xu ◽  
Lin Lin ◽  
Jing Dong Wang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Machine Tool ◽  
Ultrasonic Vibration ◽  
High Speed ◽  
Dynamic Performance ◽  
Milling Machine ◽  
Element Analysis ◽  
Dynamic Performance Analysis ◽  
Turn Milling

In this paper, ultrasonic vibration turn-milling machine tool has been designed based on the analysis of processing principle . CATIA is used to generate three-dimensional solid model for the overall layout structure of high speed miniature lathe, while finite element analysis software is used to achieve dynamic performance analysis, so as to obtain each factorial of machine-tool vibration and natural frequency. The results are important to machine optimization and the construction of experimental prototype, and will guide the next work.

Center Tower Stiffness Study in Multi-Tower Suspension Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1082-1086 ◽  
Author(s):  
Xiao Yan Zheng ◽  
Zhuo De Feng ◽  
Hong Jing Du ◽  
Yue Xu
Keyword(s):  
Finite Element ◽  
Dynamic Performance ◽  
Suspension Bridge ◽  
Calculation Model ◽  
Flexural Stiffness ◽  
Performance Difference ◽  
Performance Variation ◽  
Longitudinal Stiffness ◽  
Reasonable Range ◽  
Element Theory

The existence of center towers is the origin of performance difference between multi-tower suspension bridge and the traditional one, and longitudinal stiffness of the center tower is a decisive factor. Based on the finite element theory, the paper establishes numerical calculation model of multi-tower suspension bridge, and analyzes it’s static and dynamic performance variation by using different longitudinal flexural stiffness. Moreover, the factors that affect center tower stiffness are determined. Referring to judgment standards about usability and structure security given by existing research, the reasonable range of center tower stiffness is established. Besides, the paper tries to ascertain reasonable center tower stiffness by using the static mechanic performance of service phase as judgment standards.

scholarly journals Dynamic Behavior Analysis of Non-Contacting Hydrodynamic Finger Seal Based on Fluid-Solid-Interaction Method

2018 ◽  
Vol 153 ◽  
pp. 07005
Author(s):  
Hua Su ◽  
Jiru Wang
Keyword(s):  
High Pressure ◽  
Dynamic Behavior ◽  
High Speed ◽  
Gas Flow ◽  
Dynamic Performance ◽  
Low Pressure ◽  
Structure Design ◽  
Structural Deformation ◽  
Dynamic Performance Analysis ◽  
Fluid Solid Interaction

Finger seal is an advanced compliant seal and can be utilized to separate high (HP) and low pressure (LP) zones in high speed rotating shaft environment. The work to be presented concerns the dynamic behavior of a repetitive section of a two-layer finger seal with high-and padded low-pressure laminates. The dynamic performance of the finger seal are analyzed by the coupled fluid-solid-interaction (FSI) simulations. By using the commercial software ANSYS-CFX, the numerical simulation results of interactions between the gas flow and fingers structural deformation are described when the radial periodic excitation from the shaft applies to the finger seal. And the gas film loading capacity, gas film stiffness and leakage varied with time are put forward in different working conditions. Compared with the dynamic performance analysis results based on equivalent dynamic method, the FSI dynamic analysis shows some different characteristics which are more accordance with actual circumstance. Moreover, it is shown that under low pressure differential and high rotation speed the non-contacting finger seal with advance features both in sealing effectiveness and potential unlimited life span can be obtained by rational structure design. But for the non-contacting finger seal with circumferential convergent pad working in high pressure and low rotating speed conditions, it is difficult to improve the sealing performance by the way of changing the structure parameters of finger seal. It is because the high pressure plays a major role on this sealing situation.

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