Gear Modification Analysis to Improve the Vibration and Noise of Automobile Transmission

2013 ◽  
Vol 579-580 ◽  
pp. 265-269 ◽  
Author(s):  
Yong Xiang Li ◽  
Wen Quan Shen ◽  
You Jia Zhao ◽  
Xiu Yang Hu
Keyword(s):  
Simulation Model ◽  
Simulation Analysis ◽  
Process Analysis ◽  
Engineering Application ◽  
Load Condition ◽  
Gear Pair ◽  
Actual Load ◽  
Modification Method ◽  
Gear Modification ◽  
Transmission Gear

As to the practical problems of vibration and noise of automobile transmission, this paper focuses on the gear pair of automobile transmission as the research object to realize the gear meshing analysis with the software MASTA. Through establishing the simulation model of the automobile transmission to simulate the actual load condition, the process analysis of comprehensive intelligent gear modification is carried on. Finally, the reasonable modification results indicate that the simulation analysis recurring to the professional software can obtain the modified gear of the automobile transmission more suitable to the engineering application, which will provide good guidance for the development and application of new transmission gear in the future and lay the research foundation to reduce the vibration and noise of the transmission based on the gear modification method.

Gear Strength Optimization Analysis of Automobile Gearbox Based on the Software of MASTA

2013 ◽  
Vol 579-580 ◽  
pp. 216-219
Author(s):  
Hong Wang ◽  
Fu Jin Yu ◽  
Kai Long Huang ◽  
Yong Xiang Li ◽  
Wen Quan Shen
Keyword(s):  
Process Analysis ◽  
Load Condition ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Gear Transmission ◽  
Gear Pair ◽  
Optimization Analysis ◽  
Gear Design ◽  
Development Cycle ◽  
New Perspective

Automobile gear, as key part of automobile gearbox, bears the torque of automobile transmission, whose strength will directly affect the transmission efficiency of automobile gearbox and the service life of transmission system. On the basis of gear transmission theory, This paper focuses on gear pair of an automobile transmission as the research object, with the help of the professional transmission system software of MASTA, to realize the gear meshing analysis of the automobile gearbox, establish the simulation model of the automobile gearbox, simulate the actual load condition to complete the process analysis of the gear transmission. Finally, the strength optimization analysis of gear pair is implemented to obtain the reasonable gear design, which is more close to the gear meshing transmission process. There are great benefits to improve the overall performance of the automobile gearbox, effectively reduce the test cost, shorten development cycle, and optimize product structure. Therefore, it will provide guidance for the development and application of new transmission gear in the future, and present a new perspective and approach for the optimization analysis of gear strength.

A Method to Define the Best Weld Sequence Using a Limited Number of Welding Simulation Analysis

2015 ◽  
Author(s):  
Mahyar Asadi ◽  
Ghazi Alsoruji
Keyword(s):  
Simulation Model ◽  
Surrogate Model ◽  
Simulation Analysis ◽  
Combinatorial Problem ◽  
Fem Analysis ◽  
Simulation Models ◽  
Computational Time ◽  
Optimal Sequence ◽  
Welded Structure ◽  
Welding Sequence

Weld sequence optimization, which is determining the best (and worst) welding sequence for welding work pieces, is a very common problem in welding design. The solution for such a combinatorial problem is limited by available resources. Although there are fast simulation models that support sequencing design, still it takes long because of many possible combinations, e.g. millions in a welded structure involving 10 passes. It is not feasible to choose the optimal sequence by evaluating all possible combinations, therefore this paper employs surrogate modeling that partially explores the design space and constructs an approximation model from some combinations of solutions of the expensive simulation model to mimic the behavior of the simulation model as closely as possible but at a much lower computational time and cost. This surrogate model, then, could be used to approximate the behavior of the other combinations and to find the best (and worst) sequence in terms of distortion. The technique is developed and tested on a simple panel structure with 4 weld passes, but essentially can be generalized to many weld passes. A comparison between the results of the surrogate model and the full transient FEM analysis all possible combinations shows the accuracy of the algorithm/model.

scholarly journals Optimal Design and Simulation Analysis of Spike Tooth Threshing Component Based on DEM

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1163
Author(s):  
Yajun Yu ◽  
Liangshan Li ◽  
Jiale Zhao ◽  
Xiangeng Wang ◽  
Jun Fu
Keyword(s):  
Optimal Design ◽  
Simulation Analysis ◽  
Process Analysis ◽  
Structural Parameters ◽  
Compressive Force ◽  
Microscopic Analysis ◽  
Analysis Software ◽  
Damage Rate ◽  
Tooth Type ◽  
Simulation Time

This paper takes a local drum-type corn thresher as an example. In order to make the threshing principle transform to the plate-tooth type, the width of the spike-tooth threshing component is increased gradually, and three threshing components of different shape and size are selected as the research objects. Based on the preliminary experimental research, the corn threshing process is simulation analyzed using the self-developed corn threshing process analysis software. The effects of the width of the threshing component on the corn ears threshing rate and kernel damage rate under different rates of drum rotation were studied from a macroscopic perspective. The results show that with the increase of drum rotation rate, both the corn ear threshing rate and kernel damage rate increase; with the increase of threshing component width, the threshing rate increases and the damage rate decreases; and when the component width is too large, the stacking between adjacent components has an impact on the threshing performance. The effects of threshing component width on the amount of kernel threshing and the total compressive force during the simulation time were investigated from microscopic perspective at different rates of drum rotation, and the results show that the microscopic analysis is consistent with the macroscopic analysis. Therefore, the optimization of the structural parameters and operating parameters of the threshing component was achieved. When the width of the threshing component was 25 mm and the roller speed was 187.50 rpm, the threshing performance was optimal, with a 98.04% corn ears threshing rate and a 2.56% kernel damage rate. This paper verifies the practical applicability of the corn threshing process analysis software and provides a reference for the optimal design of threshing devices.

Simulation Analysis and Optimization of Lubricating Oil System

2021 ◽  
Author(s):  
Qiongxiao Wu ◽  
Jianjun Wang ◽  
Jingming Chen ◽  
Pengzheng Li
Keyword(s):  
Simulation Model ◽  
Simulation Analysis ◽  
Sudden Change ◽  
Pressure Change ◽  
Lubricating Oil ◽  
Maximum Pressure ◽  
Closing Time ◽  
Original Design ◽  
Relief Valve ◽  
Simulation Results

Abstract Based on the one-dimensional simulation model of lubricating oil system is established and analyzed by using FLOWMASTER software, this paper proposes a new method of optimizing lubricating oil system by PID technology. Ensure that the configuration requirements and control strategies of the relevant accessories of the simulation model are satisfied with the design requirements. Firstly, by simulating lubricating oil pressure fluctuation and lubricating oil flow distribution under Open/Close Valve in different opening and closing time, the optimal opening/closing time of Open/Close Valve is determined to be 0.2 s and 0.5 s respectively. Secondly, by writing the controller script file combined with a controller to realize automatic unloading relief valve simulation, determine the relief valve pressure regulating range of 0∼0.38 MPa, For precision of constant pressure valve of oil spill, the simulation results show that the average 10 m3/h flow caused by pressure changes of about 0.06 MPa. Under the flow sudden change signal of about 40 m3/h, the maximum pressure change is less than 0.1 MPa. Through the simulation results, it is found that most of the lubrication parts in the original design have the phenomenon of flow redundancy, which causes unnecessary pump power loss. The system is optimized by PID technology. By comparing the simulation results before and after optimization, it is found that the speed of constant displacement pump could be changed in time by PID controller, and the flow redundancy could be improved significantly, so the lubricating oil system could be lower consumption and achieve the purpose of optimization.

Recheck Calculation of Dahedong Trench-Buried Inverted Siphon Structure

2014 ◽  
Vol 488-489 ◽  
pp. 589-592
Author(s):  
Min Tan
Keyword(s):  
Finite Element ◽  
Simulation Analysis ◽  
Process Analysis ◽  
Three Dimensional ◽  
Inverted Siphon ◽  
Operating Process ◽  
Element Simulation ◽  
Dimensional Finite Element ◽  
Water Conveyance ◽  
Three Dimensional Finite Element

Inverted siphon structure is a common water conveyance buildings, computer as a efficient computational tool is used, this paper adopt finite element method to carry out three-dimensional finite element simulation analysis for Dahedong inverted siphon structure. Deducing variation law of the inverted siphons stress and displacement in construction process and operating process. Analysis results further verified that design scheme is reasonable and safe, it has certain application value.

Research on the Kinematics Simulation of Out-Moving Jaw Crusher Based on Nastran

2013 ◽  
Vol 433-435 ◽  
pp. 63-66
Author(s):  
Jiang Yong
Keyword(s):  
Simulation Model ◽  
Simulation Analysis ◽  
Dynamic Performance ◽  
Theory Model ◽  
Structure Design ◽  
Side Plate ◽  
Jaw Crusher ◽  
Kinematics Simulation ◽  
Motion Characteristics ◽  
Dynamic Performance Analysis

In this paper, out-moving jaw crusher machine is regarded as the research object and we established the simulation model of virtual prototype based on Nastran. Through the simulation analysis of the movement process, trajectories of moving jaw side plate and a movable jaw toggle plate and related parameters were obtained and compared and verify the simulation model and theory model. The results show that: the simulation model reflects the motion characteristics of the theoretical model well. So it provides theoretical reference for improvement of dynamic performance analysis and structure design of jaw crusher and has important application value in engineering.

Digital Simulation of Impact Phenomenon in Spur Gear Systems

1977 ◽  
Vol 99 (3) ◽  
pp. 792-798 ◽  
Author(s):  
R. C. Azar ◽  
F. R. E. Crossley
Keyword(s):  
Simulation Model ◽  
Digital Simulation ◽  
Spur Gear ◽  
Gear Pair ◽  
Frequency Spectra ◽  
Similar Frequency ◽  
Gear Teeth ◽  
Tooth Form ◽  
Stiffness And Damping ◽  
Clearance Model

A digital simulation model is developed to represent a lightly loaded geared torsional system consisting of a drive unit, spur gear pair and load connected by flexible shafts. A clearance model called an Impact Pair [13] is used to represent the gear pair and includes the effects of backlash, time-varying stiffness and damping of the gear teeth and tooth-form error. Experimentally determined frequency spectra of the torsional oscillations of a gear-driven shaft have been plotted and reported on earlier [1]. Similar frequency plots are obtained from the simulation study, and data from these plots are compared with the experimental results for a variety of parameter changes including shaft speed, backlash and load. Results indicate that the simulation model portrays reasonably well the torsional behavior of the output shaft.

The Distribution Design and Dynamic Simulation Analysis of the Flow of the Transmission’s Cooling and Lubrication System

2014 ◽  
Vol 633-634 ◽  
pp. 1303-1310
Author(s):  
Jing Ke Du ◽  
Shu Han Wang ◽  
Ting Bin Song ◽  
Teng Teng Kang
Keyword(s):  
Simulation Model ◽  
Simulation Analysis ◽  
System Modeling ◽  
Flow Distribution ◽  
Lubrication System ◽  
System Flow ◽  
Set Up ◽  
Cooling And Lubrication ◽  
Test Result ◽  
New System

The bearing lubrication system flow distribution design of the transmission was realized with a new system modeling method, targeted at the problem of a certain type of transmission’s bearings’ sintering. The heat-generated model and the flow-required model of the bearings and the gears were set up, and the required lubrication flow was obtained. The simulation model of the system flow distribution was established, the simulation analysis toward the dynamic characteristic of the transmission’s lubrication flow’s distribution was performed, and the results of the simulation analysis and the test were analyzed comparatively. The result showed that the simulation model matched the test result well, proving the effectiveness and correctness of the model of the transmission’s flow distribution.

Computer-Simulation Analysis of Foraging by Heteromyid Rodents in Relation to Seed Distributions - Implications for Coexistence

1994 ◽  
Vol 42 (4) ◽  
pp. 467 ◽  
Author(s):  
OJ Reichman ◽  
E Roberts
Keyword(s):  
Computer Simulation ◽  
Simulation Model ◽  
Simulation Analysis ◽  
Computer Simulation Model ◽  
Foraging Patterns ◽  
Uniform Distributions ◽  
Naturally Occurring ◽  
Sufficient Energy ◽  
Heteromyid Rodents ◽  
Seed Distribution

A number of hypotheses have been proposed to explain the mechanisms that promote coexistence among sympatric rodents in North American deserts. In an effort to determine how the distribution of seeds influences foraging patterns and coexistence in a three-species community of heteromyid rodents, we developed a computer simulation model that determines the efficiency of foraging for animals of different sizes. Specifically, the simulation determines how long it would take a forager to gather sufficient energy for 24 h if the animal stopped at seed patches of certain densities. The analyses were conducted for naturally occurring seed distributions and densities, for simulated normal and uniform distributions at natural densities, and for natural distributions at seed densities one-third those known to occur naturally. The results indicate that, under natural distributions and densities, each of the three species possessed unique optima for utilising seed patches of different density. However, when either the seed distribution or density differed from actual values, all three species had identical optima. The implications of these results for promoting coexistence are discussed.

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