The Static and Modal Analysis of 12000KN Fine Blanking Press Frame

2014 ◽  
Vol 1021 ◽  
pp. 205-208
Author(s):  
Rui Xiong ◽  
Chun Dong Zhu ◽  
Xin Yu Li
Keyword(s):  
High Speed ◽  
Impact Load ◽  
Frame Structure ◽  
Concept Design ◽  
Element Analysis ◽  
Fine Blanking ◽  
Optimal Interval ◽  
Key Factor ◽  
Huge Impact ◽  
Frame Stiffness

The fine blanking press supports huge impact load and high-speed stamping frequency in the work process, and the deformation of the molds and the precision of components are significantly influenced by the deformation and vibration of the press. The frame under impact load and stamping frequency, thus the frame structure is the key factor to ensure the reliable work. To make the virtual prototype of the 12000KN fine blanking press frame meet requirements in the best way, the concept design of the frame was built. And optimal interval of the frame stiffness and first order natural frequency were find according to finite element analysis, which can lay the foundation for the design of an ideal frame.

scholarly journals Finite Element Analysis of Impact Energy on Spur Gear

2018 ◽  
Vol 225 ◽  
pp. 06011 ◽  
Author(s):  
Ismail Ali Bin Abdul Aziz ◽  
Daing Mohamad Nafiz Bin Daing Idris ◽  
Mohd Hasnun Arif Bin Hassan ◽  
Mohamad Firdaus Bin Basrawi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Impact Energy ◽  
High Speed ◽  
Impact Test ◽  
Impact Load ◽  
Gear Tooth ◽  
Test Equipment ◽  
Element Analysis ◽  
The Impact

In high-speed gear drive and power transmission, system impact failure mode always occurs due to the sudden impact and shock loading during the system in running. Therefore, study on the amount of impact energy that can be absorbed by a gear is vital. Impact test equipment has been designed and modelled for the purpose to study the impact energy on gear tooth. This paper mainly focused on Finite Element Analysis (FEA) of impact energy that occurred during simulation involving the impact test equipment modelling. The simulation was conducted using Abaqus software on critical parts of the test equipment to simulate the impact event and generate impact data for analysis. The load cell in the model was assumed to be free fall at a certain height which gives impact load to the test gear. Three different type of material for the test gear were set up in this simulation. Results from the simulation show that each material possesses different impact energy characteristic. Impact energy values increased along with the height of load drop. AISI 1040 were found to be the toughest material at 3.0m drop that could withstand up to 44.87N.m of impact energy. These data will be used to validate data in physical experiments in further study.

scholarly journals Flexible-Rigid Wheelset Introduced Dynamic Effects due to Wheel Tread Flat

2021 ◽  
Vol 2021 ◽  
pp. 1-21
Author(s):  
Awel Momhur ◽  
Y. X. Zhao ◽  
Liwen Quan ◽  
Sun Yazhou ◽  
Xialong Zou
Keyword(s):  
High Speed ◽  
Statistical Approach ◽  
Impact Load ◽  
Vertical Acceleration ◽  
Vehicle Speed ◽  
Dynamic Impact ◽  
Element Analysis ◽  
Wheel Flat ◽  
Wheel Radius ◽  
The Impact

The widespread faults that occur in railway wheels and can cause a massive dynamic impact are the wheel tread flat. The current work considered changes in vehicle speed or wheel radius deviation and studied the dynamic impact load. The modal technique for the impact evaluation induced by the wheel flat was proposed via the finite element analysis (FEA) software package ANSYS, integrated into a multibody dynamics model of the high-speed train CRH2A (EMU) through SIMPACK. The irregularity track line has developed and depends on the selected simulation data points. Additionally, a statistical approach is designed to analyze the dynamic impact load response and effect and consider different wheel flat lengths and vehicle speeds. The train speed influence on the flat size of the vertical wheel-rail impact response and the statistical approach are discussed based on flexible, rigid wheelsets. The results show that the rigid wheel flat has the highest vertical wheel impact load and is more significant than the flexible wheel flat force. The consequences suggest that the wheelset flexibility can significantly improve vertical acceleration comparably to the rigid wheel flats. In addition, the rendering of the statistical approach shows that the hazard rate, PDF, and CDF influence increase when the flat wheel length increases.

Development of the Auto-Fit Dial and its application to protective vests

2021 ◽  
pp. 004051752110608
Author(s):  
Jaewook Ryu ◽  
Sujin Park ◽  
Sumin Helen Koo ◽  
Giuk Lee
Keyword(s):  
High Speed ◽  
Release Mechanism ◽  
Concept Design ◽  
Element Analysis ◽  
Detailed Design ◽  
Spiral Spring ◽  
Working Principle ◽  
The Wire ◽  
Pulling Force ◽  
Time Required

This study proposes the Auto-Fit Dial, which is suitable for high-speed fitting; it includes a function that can wind wire at high speed using an energy storage–release mechanism. The Auto-Fit Dial can store energy in advance in the spiral spring via the rotation of the knob cover, and it releases the stored energy to wind the wire when required by pushing the knob cover. Firstly, the concept design and working principle of the Auto-Fit Dial are explained. Next, a detailed design and structural stability analysis of the mechanical components are described based on the design formula and finite-element analysis. An Auto-Fit Dial prototype is manufactured according to the detailed design with the weight, diameter, and height of 9.7 g, 30.5 mm, and 16.7 mm, respectively. The maximum number of rotations is 5.2 turns, which can wind a wire up to a length of 320 mm. The pulling force applied when the Auto-Fit Dial pulls the wire is initially measured as 5.10 N. The time required to wind a 320 mm wire is 0.015 s, which results in an average speed of 21.33 m/s. Moreover, the Auto-Fit Sleeve is fabricated and applied to the arm sleeve to verify the utility of the Auto-Fit Dial, which combines wire and fabric. Finally, the Auto-Fit Vest is developed by applying a protective vest to the Auto-Fit Dial.

scholarly journals Numerical and experimental study for AM50 magnesium alloy under dynamic loads

2021 ◽  
Vol 349 ◽  
pp. 02012
Author(s):  
Iulian-Ionuț Ailinei ◽  
Sergiu-Valentin Galațanu ◽  
Cosmin Ioan Onea ◽  
Liviu Marșavina
Keyword(s):  
Magnesium Alloy ◽  
High Speed ◽  
Impact Load ◽  
Sensitivity Study ◽  
Test Method ◽  
Steering Wheel ◽  
Element Analysis ◽  
Charpy Test ◽  
Analysis And Design ◽  
Input Variables

Magnesium alloys are widely used in automotive (steering wheel frames) and aerospace due to their lightweight, ductility, energy absorption and castability properties. Finite Element Analysis and design optimisation have driven the improvement of structural crashworthiness, stiffness, strength, durability, and NVH (noise vibration, harshness) performance, making it possible to meet both the safety requirements and weight reduction targets. The accuracy of the numerical methods is strongly dependent on the accuracy of the material models and parameters employed. This paper presents the numerical Simulation of the Charpy test for AM50 magnesium alloy. This standardised high-speed impact test method measures the energy absorbed by a standard specimen while breaking under an impact load. Numerical simulations were performed using Ansys LS-Dyna explicit solver combined with a Johnson-Cook material's law. Then a sensitivity study was performed using Ansys optiSLang to identify which of the input variables (JC parameters, test specimen's dimensions) has the most influence on the output variables (contact force and absorbed energy).

Study on the Seismic Performance of the Braced Controlled Rocking Reinforced Concrete Frame Structure System

2014 ◽  
Vol 1065-1069 ◽  
pp. 1254-1259
Author(s):  
Pei Li ◽  
Jian Xin Liu
Keyword(s):  
Reinforced Concrete ◽  
Frame Structure ◽  
Concept Design ◽  
Shearing Force ◽  
Reinforced Concrete Frame ◽  
Element Analysis ◽  
Structure System ◽  
Concrete Frame ◽  
Reinforced Concrete Frame Structure ◽  
Different Levels

On the basis of structural concept design, this paper puts forward a new braced controlled rocking reinforced concrete frame structure system, researching dynamic characteristics of the BCR-RCF structure when the joints is been weakened in different levels by using finite element analysis software Abaqus, analyzing the reasonable degree of rocking joints stiffness weakening. By comparing the dynamic response of conventional reinforced concrete frame and the BCR-RCF structure, it shows that the BCR-RCF structure can effectively reduce the structural shearing force and acceleration response, however, displacement and velocity response is bigger than RCF structure. Compared with the RCF structure, shearing force and displacement responses of the BCR-RCF are more evenly distributed along the floor, which helps preventing excessive concentration of interlaminar deformation, so that materials of every layer can be fully utilized. After adding metal damper into the BCR-RCF structure, the displacement response can be effectively controlled.

The Damage Assessment of Steel Structures Using FDD Method

2013 ◽  
Vol 831 ◽  
pp. 145-148
Author(s):  
Kang Min Lee ◽  
Keun Yeong Oh ◽  
Rui Li ◽  
Liu Yi Chen ◽  
Kang Seok Kim
Keyword(s):  
Natural Frequency ◽  
Structural Damage ◽  
Impact Load ◽  
Damage Index ◽  
Steel Structures ◽  
Frame Structure ◽  
Dimensional Structure ◽  
Actual Behavior ◽  
Physical Damage ◽  
Element Analysis

Mathematical model through system identification techniques is composed of the development of a variety of back Analysis solutions and signal processing technology reflecting physical damage of structures. This study was in progress divided into analysis and experimental research, and it was simulated by simplified model based on relevant theory of damage locations and damage estimates. Steel structure concerned by the vibration and impact load was researched in order to predict the dynamic behavior. The 3rd floor of one bay steel frame structure was used, because analysis of whole structure is inconvenient when analyzing and testing, and it is very hard to accurately predict actual behavior by complexity of model in case of three-dimensional structure. Natural frequency of the simulation was calculated as using ANSYS program, general-purpose finite element analysis program, and damage index was estimated through counting natural frequency when structural damage occurred in the test as using the FDD (Frequency-Domain Decomposition).

Based on SolidWorks COSMOS 2.5 Tons, 4 m•s-1 High Speed Elevator Car Frame's Finite Element Analysis

2012 ◽  
Vol 510 ◽  
pp. 298-303 ◽  
Author(s):  
Feng Lu ◽  
Yuan Bao ◽  
Xiang Guo Zhou ◽  
Ya Jun Wang
Keyword(s):  
3D Modeling ◽  
High Speed ◽  
Frame Structure ◽  
Special Significance ◽  
Element Analysis ◽  
Material Cost ◽  
Production Practices ◽  
The Stability ◽  
Bearing Structure ◽  
Safety First

Car frame which is usually made of up beam, down beam, upright, cradle beam and bracer is bearing structure part which has a high intensity and stability requirements. Through research 2.5 tons, 4 high speed elevator's car frame, car frame's up beam, down beam, upright and cradle beam are designed by channel steel. In order to reduce the material cost of car frame based on the precondition that wouldn't influence frame's the stability and safety. First, Treating with the software SolidWorks establish 3D modeling. Second, by using the Plug-in COSMOS exert restriction, load and divide gridding meshing on the new car frame structure. After FEA gets stress cloud, strain cloud and safety factor cloud which provide the theory evidence of the new structure. The analysis of COSMOS shows the feasibility and stability of new structure. It can works on the condition that car frame keep steady and safe with material cost to lower, which has special significance on production practices.

Performance analysis of magnetic gear with Halbach array for high power and high speed

2020 ◽  
Vol 64 (1-4) ◽  
pp. 959-967
Author(s):  
Se-Yeong Kim ◽  
Tae-Woo Lee ◽  
Yon-Do Chun ◽  
Do-Kwan Hong
Keyword(s):  
Permanent Magnet ◽  
Eddy Current ◽  
High Power ◽  
High Speed ◽  
Torque Ripple ◽  
Eddy Current Loss ◽  
Element Analysis ◽  
Current Loss ◽  
Halbach Array ◽  
Magnetic Gear

In this study, we propose a non-contact 80 kW, 60,000 rpm coaxial magnetic gear (CMG) model for high speed and high power applications. Two models with the same power but different radial and axial sizes were optimized using response surface methodology. Both models employed a Halbach array to increase torque. Also, an edge fillet was applied to the radial magnetized permanent magnet to reduce torque ripple, and an axial gap was applied to the permanent magnet with a radial gap to reduce eddy current loss. The models were analyzed using 2-D and 3-D finite element analysis. The torque, torque ripple and eddy current loss were compared in both models according to the materials used, including Sm2Co17, NdFeBs (N42SH, N48SH). Also, the structural stability of the pole piece structure was investigated by forced vibration analysis. Critical speed results from rotordynamics analysis are also presented.

Tribological and dynamical analysis of a brake pad with multiple blocks for a high-speed train

2019 ◽  
Vol 234 (11) ◽  
pp. 1771-1788
Author(s):  
YK Wu ◽  
JL Mo ◽  
B Tang ◽  
JW Xu ◽  
B Huang ◽  
...  
Keyword(s):  
High Speed ◽  
Wear Behavior ◽  
Dynamical Analysis ◽  
Brake Disc ◽  
Brake Pad ◽  
High Speed Train ◽  
Brake Squeal ◽  
Element Analysis ◽  
Single Block ◽  
Middle Ring

In this research, the tribological and dynamical characteristics of a brake pad with multiple blocks are investigated using experimental and numerical methods. A dynamometer with a multiblock brake pad configuration on a brake disc is developed and a series of drag-type tests are conducted to study the brake squeal and wear behavior of a high-speed train brake system. Finite element analysis is performed to derive physical explanations for the observed experimental phenomena. The experimental and numerical results show that the rotational speed and braking force have important influences on the brake squeal; the trends of the multiblock and single-block systems are different. In the multiblock brake pad, the different blocks exhibit significantly different magnitudes of contact stresses and vibration accelerations. The blocks located in the inner and outer rings have higher vibration acceleration amplitudes and stronger vibration energies than the blocks located in the middle ring.

Impact Load Buffering Method Based on Stress Wave Attenuation Principle

2019 ◽  
Vol 11 (02) ◽  
pp. 1950019 ◽  
Author(s):  
Lin Gan ◽  
He Zhang ◽  
Cheng Zhou ◽  
Lin Liu
Keyword(s):  
Stress Wave ◽  
Wave Attenuation ◽  
Impact Load ◽  
Dynamics Simulation ◽  
Scanning System ◽  
Isolation Method ◽  
Element Analysis ◽  
System A ◽  
High Emission ◽  
The Impact

Rotating scanning motor is the important component of synchronous scanning laser fuze. High emission overload environment in the conventional ammunition has a serious impact on the reliability of the motor. Based on the theory that the buffer pad can attenuate the impact stress wave, a new motor buffering Isolation Method is proposed. The dynamical model of the new buffering isolation structure is established by ANSYS infinite element analysis software to do the nonlinear impact dynamics simulation of rotating scanning motor. The effectiveness of Buffering Isolation using different materials is comparatively analyzed. Finally, the Macht hammer impact experiment is done, the results show that in the experience of the 70,000[Formula: see text]g impact acceleration, the new buffering Isolation method can reduce the impact load about 15 times, which can effectively alleviate the plastic deformation of rotational scanning motor and improve the reliability of synchronization scanning system. A new method and theoretical basis of anti-high overload research for Laser Fuze is presented.

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