Mould Structure Optimization of the Biomass Molding Machine

2013 ◽  
Vol 330 ◽  
pp. 826-829
Author(s):  
Jian Feng Meng ◽  
Bai Tao Feng ◽  
Yu Ping Dong
Keyword(s):  
Renewable Energy ◽  
Curve Fitting ◽  
Optimization Model ◽  
Equivalent Stress ◽  
Structure Optimization ◽  
Molding Machine ◽  
Key Technologies ◽  
Maximum Equivalent Stress ◽  
The Relationship

Biomass is a renewable energy. Its curing and molding technology is one of the key technologies and mould structure is a important factor. A model is set based on ANSYS to simulate the molding, and using curve fitting, the relationship between maximum equivalent stress and mould parameter is founded. Then the optimization model is set and mould parameter is optimized.

Stress Analysis of the Biomass Molding Mould Based on ANSYS

2013 ◽  
Vol 716 ◽  
pp. 713-716
Author(s):  
Jian Feng Meng ◽  
Bai Tao Feng ◽  
Yu Ping Dong
Keyword(s):  
Renewable Energy ◽  
Stress Field ◽  
Stress Analysis ◽  
Frictional Force ◽  
Equivalent Stress ◽  
Force Distribution ◽  
Structure Parameter ◽  
Key Technologies ◽  
Maximum Equivalent Stress ◽  
The Relationship

Biomass is a renewable energy. Its curing and molding technology is one of the key technologies and mould structure parameter is a important factor. A model is set based on ANSYS to simulate the molding, then the equivalent stress field and frictional force distribution of mould are founded. Finally, the relationship between maximum equivalent stress and mould parameter is studied.

Structure Optimization on Sensitivity Analysis for Ultra-Supercritical Bypass Valve

2012 ◽  
Vol 619 ◽  
pp. 282-285
Author(s):  
Long Yu ◽  
Shu Rong Yu
Keyword(s):  
Sensitivity Analysis ◽  
Equivalent Stress ◽  
Target Function ◽  
Structure Optimization ◽  
Mathematics Model ◽  
Sampling Point ◽  
Design Variables ◽  
Bypass Valve ◽  
Maximum Equivalent Stress ◽  
The Relationship

Given mathematics model and boundary conditions of the structure optimization for ultra-supercritical bypass valve (UBV) in operation. FEM results showed that 10 design variables and 178 sampling points are chosen for iteration, and the relationship between maximum equivalent stress and structure parameters are obtained by sensitivity analysis. By using Monte-Carlo method, the quantity of optimized sampling point can be reduced by 17% and calculation time is reduced clearly. The higher sensitivity parameters affecting target function are found by contrasting response degree, and improving the parameters directly is the way that enhances intensity of the UBV. Base on the sensitivity analysis, the linearized equivalent stress of weak place in the UBV can be reduced by 44% with the safety performance enhanced.

The Optimal Design of Cold Extrusion Die and its Realization

2013 ◽  
Vol 455 ◽  
pp. 517-521
Author(s):  
Yan Cheng ◽  
Li Wen Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Equivalent Stress ◽  
Structure Optimization ◽  
Parametric Model ◽  
Cold Extrusion ◽  
Optimal Result ◽  
Extrusion Die ◽  
Maximum Equivalent Stress ◽  
Element Method

According to the structure optimization of combined extrusion die, using finite element method to establish parametric model and optimize the combination die, compare the results with the result of Lame formula to prove the correctnesss of finite element method; and adjust the structure of concave of die basing the optimal result, so as to reduce the stress concentration and the maximum equivalent stress value on the concave mould, and thus the life-span of the die is prolonged.

scholarly journals The relationship between stress of plate-fin structures and emergency stop operation process in LNG heat exchanger

2021 ◽  
Vol 76 ◽  
pp. 77
Author(s):  
Hongqiang Ma ◽  
Shengxun Wang ◽  
Yue Xie ◽  
Xinmei Luo ◽  
Jianping Han
Keyword(s):  
Heat Exchanger ◽  
Temperature Difference ◽  
Equivalent Stress ◽  
Equilibrium Temperature ◽  
Equilibrium Pressure ◽  
Operation Process ◽  
Maximum Equivalent Stress ◽  
Emergency Stop ◽  
Last Stage ◽  
The Relationship

For insuring the safe operation of LNG heat exchanger in the Emergency Stop Operation Process (ESOP), a numerical method is proposed to investigate the stress of Plate-Fin Structures (PFS) in that. The relationship between stress of PFS and ESOP is analyzed in LNG heat exchanger. The results will be obtained that the maximum equivalent stress of PFS is greater at the initial stage of ESOP than that at the last stage when the HMR pressure is more than 5 MPa. The maximum equivalent stress increases with the equilibrium temperature when is greater than 180 K and reaches peak value at the last stage of ESOP. The maximum equivalent stress is larger at the last stage of ESOP than the other stage and increases with the equilibrium pressure. When the temperature difference is more than 5 K in the ESOP, the influence of that is obvious for the stress of PFS. In the ESOP, the equilibrium temperature and temperature difference should be controlled within 240 K and 5 K, respectively.

Research on Three-Dimensional Structure Optimization for Fir-Tree Root and Rim of Turbine Blade with Complex Damping Structure

2013 ◽  
Vol 312 ◽  
pp. 55-59
Author(s):  
Ming Hui Zhang ◽  
Qiang Zhang ◽  
Lu Zheng ◽  
Di Zhang
Keyword(s):  
Turbine Blade ◽  
Equivalent Stress ◽  
Turbine Blades ◽  
Three Dimensional ◽  
Mathematical Optimization ◽  
Structure Optimization ◽  
Dimensional Structure ◽  
Initial Structure ◽  
Maximum Equivalent Stress ◽  
Complex Damping

The research on structure optimization for the fir-tree root and rim of a steam turbine blade with complex damping structure was conducted by three-dimensional contact finite element method and mathematical optimization algorithm. A multi-variable parametric model of three turbine blades and rims with fir-tree root and rim was established. Twelve critical geometrical variables of the root-rim were optimized to minimize the maximum equivalent stress of the root-rim. The optimal structure of the fir-tree root-rim was finally obtained through the optimization process and the equivalent stress of the root and rim both had evident reductions, Compared with the initial structure, the maximum equivalent stress of the root and rim reduced by 13.47% and 12.26%, respectively. Relevant work is expected to support the design of turbine blade root-rim in theory and improve the operation reliability of turbo-machinery to some extent.

Shrinkage Optimization of Flat Receptacle Using the Finite Element Method

2008 ◽  
Vol 575-578 ◽  
pp. 478-482 ◽  
Author(s):  
Zhen Ying Xu ◽  
Yun Wang ◽  
Pei Long Dong ◽  
Kai Xiao
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Maximum Stress ◽  
Equivalent Stress ◽  
Structure Optimization ◽  
Work Conditions ◽  
The Finite Element Method ◽  
Maximum Equivalent Stress ◽  
Simulation Results ◽  
Aluminum Profiles

Flat receptacle, which is used in extruding the large aluminum profiles, is in harsh work conditions. Due to the irregularity of inner hole of flat receptacle, inconsistent resistance of shrinking fitting affects the inner hole within which nonuniform deformation occurs. If the nonuniformity exceeds the specified dimension accuracy, tiresome work including mould repairing and structure optimization has to be done. ANSYS is used to simulate the flat receptacle. It is shown that the maximum stress appears in the arc area of inner hole. Therefore, we present one new method using the preloaded layer with changeable shrinkage to replace the preloaded layer with uniform shrinkage. Considering the processing and assembling factors, we adopt the elliptical outer layer and circular inner layer as the new structure. Then the optimizations of flat receptacle with uniform and changeable shrinkage are implemented using the optimizing module, receptively. The optimized results show the maximum equivalent stress in the corner of inner-hole decreases about 5.47% if adopting the changeable shrinkage. The numerical simulation results show that the feasibility of changeable shrinkage and elliptical preloaded layer.

scholarly journals Empirical Research on the Relationship amongst Renewable Energy Consumption, Economic Growth and Foreign Direct Investment in Kazakhstan and Uzbekistan

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 332
Author(s):  
Janusz Grabara ◽  
Arsen Tleppayev ◽  
Malika Dabylova ◽  
Leonardus W. W. Mihardjo ◽  
Zdzisława Dacko-Pikiewicz
Keyword(s):  
Economic Growth ◽  
Foreign Direct Investment ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Direct Investment ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Renewable Energy Consumption ◽  
Integration Test ◽  
The Relationship

In this contemporary era, environmental problems spread at different levels in all countries of the world. Economic growth does not just depend on prioritizing the environment or improving the environmental situation. If the foreign direct investment is directed to the polluting industries, they will increase pollution and damage the environment. The purpose of the study is to consider the relationship between foreign direct investment in Kazakhstan and Uzbekistan and economic growth and renewable energy consumption. The study is based on data obtained from 1992 to 2018. The results show that there is a two-way link between foreign direct investment and renewable energy consumption in the considered two countries. The Granger causality test approach is applied to explore the causal relationship between the variables. The Johansen co-integration test approach is also employed to test for a relationship. The empirical results verify the existence of co-integration between the series. The main factors influencing renewable energy are economic growth and electricity consumption. To reduce dependence on fuel-based energy sources, Kazakhstan and Uzbekistan need to attract energy to renewable energy sources and implement energy efficiency based on rapid progress. This is because renewable energy sources play the role of an engine that stimulates the production process in the economy for all countries.

scholarly journals Does Foreign Direct Investment Influence Renewable Energy Consumption? Empirical Evidence from South Asian Countries

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3470
Author(s):  
Xueqing Kang ◽  
Farman Ullah Khan ◽  
Raza Ullah ◽  
Muhammad Arif ◽  
Shams Ur Rehman ◽  
...  
Keyword(s):  
Foreign Direct Investment ◽  
Renewable Energy ◽  
Sri Lanka ◽  
South Asian ◽  
Environmental Sustainability ◽  
Direct Investment ◽  
Least Square ◽  
Asian Countries ◽  
Ordinary Least Square ◽  
The Relationship

In selected South Asian countries, the study intends to investigate the relationship between urban population (UP), carbon dioxide (CO2), trade openness (TO), gross domestic product (GDP), foreign direct investment (FDI), and renewable energy (RE). Fully modified ordinary least square (FMOLS) and dynamic ordinary least square (DOLS) models for estimation were used in the study, which covered yearly data from 1990 to 2019. We used Levin–Lin–Chu, Im–Pesaran–Shin, and Fisher PP tests for the stationarity of the variables. The outcomes of the panel cointegration approach looked at whether there was a long-run equilibrium nexus between selected variables in Pakistan, Bangladesh, India, and Sri Lanka. The FMOLS approach was also used to assess the relationship, and the results suggest that there is a significant and negative nexus between FDI and renewable energy in south Asian nations. The study’s findings reveal a strong and favorable relationship between GDP and renewable energy use. In South Asian nations (Sri Lanka, Pakistan, India, and Bangladesh), the FMOLS and DOLS findings are nearly identical, but the authors used the DOLS model for robustification. According to the findings, policymakers in South Asian economies (Sri Lanka, Pakistan, India, and Bangladesh) should view GDP and FDI as fundamental policy instruments for environmental sustainability. To reduce reliance on hazardous energy sources, the government should also reassure financial sectors to participate in renewable energy.

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