scholarly journals Cylinder Head Design of Experiment by using the Wartsila Digital Design Platform

2017 ◽  
Vol 50 (3) ◽  
pp. 330-332 ◽  
Author(s):  
Massimo Cattarinussi ◽  
Anton Leppänen ◽  
Juho Könnö ◽  
Tero Frondelius
Keyword(s):  
Optimal Design ◽  
Design Of Experiment ◽  
Cylinder Head ◽  
Digital Design ◽  
Geometrical Parameters ◽  
Response Sensitivity ◽  
Simulation Process ◽  
Structural Calculation ◽  
Fully Automatic ◽  
Parameter Interactions

Cylinder Head Design of Experiment (DOE) was carried out by using the Wartsila digital design platform. The overall goal has been to create a simulation process to perform a complete cylinder head thermal-structural calculation and create a DOE over that process to vary the inputs, the geometrical parameters under optimization, in a fully automatic workflow. The outputs, uploaded to the DOE activity, were used to rank the input effects on the output response, to capture response sensitivity to input changes, to identify parameter interactions and, at the end, to estimate the optimal design.

scholarly journals Optimal Design of A 12-Slot/10-Pole Six-Phase SPM Machine with Different Winding Layouts for Integrated On-Board EV Battery Charging

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1848
Author(s):  
Ahmed Hemeida ◽  
Mohamed Y. Metwly ◽  
Ayman S. Abdel-Khalik ◽  
Shehab Ahmed
Keyword(s):  
Optimal Design ◽  
Torque Ripple ◽  
Geometrical Parameters ◽  
Battery Chargers ◽  
Core Losses ◽  
Charging Mode ◽  
Slot Opening ◽  
Pitch Ratio ◽  
Fractional Slot Concentrated Winding ◽  
Electric Machine Design

The transition to electric vehicles (EVs) has received global support as initiatives and legislation are introduced in support of a zero-emissions future envisaged for transportation. Integrated on-board battery chargers (OBCs), which exploit the EV drivetrain elements into the charging process, are considered an elegant solution to achieve this widespread adoption of EVs. Surface-mounted permanent-magnet (SPM) machines have emerged as plausible candidates for EV traction due to their nonsalient characteristics and ease of manufacturing. From an electric machine design perspective, parasitic torque ripple and core losses need to be minimized in integrated OBCs during both propulsion and charging modes. The optimal design of EV propulsion motors has been extensively presented in the literature; however, the performance of the optimal traction machine under the charging mode of operation for integrated OBCs has not received much attention in the literature thus far. This paper investigates the optimal design of a six-phase SPM machine employed in an integrated OBC with two possible winding layouts, namely, dual three-phase or asymmetrical six-phase winding arrangements. First, the sizing equation and optimized geometrical parameters of a six-phase 12-slot/10-pole fractional slot concentrated winding (FSCW)-based SPM machine are introduced. Then, variations in the output average torque, parasitic torque ripple, and parasitic core losses with the slot opening width and the PM width-to-pole pitch ratio are further investigated for the two proposed winding layouts under various operation modes. Eventually, the optimally designed machine is simulated using analytical magnetic equivalent circuit (MEC) models. The obtained results are validated using 2D finite element (FE) analysis.

scholarly journals A Two-Round Optimization Design Method for Aerostatic Spindles Considering the Fluid–Structure Interaction Effect

2021 ◽  
Vol 11 (7) ◽  
pp. 3017
Author(s):  
Qiang Gao ◽  
Siyu Gao ◽  
Lihua Lu ◽  
Min Zhu ◽  
Feihu Zhang
Keyword(s):  
Optimal Design ◽  
Optimization Design ◽  
Design Method ◽  
Fluid Structure Interaction ◽  
Design Procedure ◽  
Design Parameters ◽  
Geometrical Parameters ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Aerostatic Spindle

The fluid–structure interaction (FSI) effect has a significant impact on the static and dynamic performance of aerostatic spindles, which should be fully considered when developing a new product. To enhance the overall performance of aerostatic spindles, a two-round optimization design method for aerostatic spindles considering the FSI effect is proposed in this article. An aerostatic spindle is optimized to elaborate the design procedure of the proposed method. In the first-round design, the geometrical parameters of the aerostatic bearing were optimized to improve its stiffness. Then, the key structural dimension of the aerostatic spindle is optimized in the second-round design to improve the natural frequency of the spindle. Finally, optimal design parameters are acquired and experimentally verified. This research guides the optimal design of aerostatic spindles considering the FSI effect.

DESIGN OPTIMIZATION OF PROSTHESIS HIP JOINT USING FEM AND DESIGN OF EXPERIMENT APPROACH

2020 ◽  
Vol 32 (06) ◽  
pp. 2050048
Author(s):  
Syed Junaid Ali ◽  
Ashish Goyal ◽  
Manish Dadhich ◽  
Om Shankar Prajapati
Keyword(s):  
Hip Joint ◽  
Design Of Experiment ◽  
Joint Replacement ◽  
Stem Length ◽  
Design Solution ◽  
Geometrical Parameters ◽  
Neck Length ◽  
Hip Joint Replacement ◽  
Ball Diameter ◽  
Base Design

In the present era, hip joint replacement is a well-known medical issue to which the male patients are mostly prone to. There are different designs available for the hip replacement process; however, each design has its benefits as well as its limitations. This study provides the optimum design solution for the hip joint replacement by changing the dimensional parameters of the hip joint. The three geometrical parameters, ball diameter, Neck length and stem length of the hip joint, are selected for the base design. Furthermore, parameters i.e. ball material and stem material are also considered in this study to reduce the weight. The above-mentioned factors have four levels, which help to generate experimental design by using design of experiment methodology. The titanium alloy, Co–Cr-alloy, stainless steel and ultra-high molecule weight polyethylene (UHMWPE) have been selected as working material for modeling of the hip joint. The L[Formula: see text] orthogonal array is simulated in ANSYS FEM solver (Version-14.5). The FEM simulation techniques have been applied, and modeling steps are also developed. Two responses i.e. Von mises stress and body weight are selected to optimize the base design for further study. The signal-to-noise ratio analysis for stress shows that the most significant factor is ball diameter and least significant factor is neck length of the hip joint. For reducing the weight of the entire model, material of stem body is the most significant factor whereas the least significant factor is stem length.

scholarly journals Optimal design of helical reducers for cement equipment

2019 ◽  
Vol 287 ◽  
pp. 01016
Author(s):  
Evgeniy Gudov ◽  
Sergey Lagutin
Keyword(s):  
Optimal Design ◽  
Load Capacity ◽  
Geometrical Parameters ◽  
Ball Mills ◽  
Gear Drive ◽  
Heavy Equipment ◽  
Helical Angle ◽  
The Difference ◽  
Rotary Kilns ◽  
New Generation

The trends in raising the technical level of multistage helical reducers for drives of cement, metallurgical and other heavy equipment are considered. An interactive method for optimizing the geometrical parameters of reducers with various gear ratios is proposed, which ensures equal strength of the stages in contact and bending endurance. It is shown that an increase in the hardness of the teeth requires an increase of the module and helical angle of the teeth, limitation of gear ratios, and to reduce the difference in center distances of adjacent stages. When creating a new generation of reducers, the transition to gears with carburized teeth leads to an increase in load capacity of 2.5-3 times. The examples of gear drive design for rotary kilns and ball mills are considered.

Optimal Design of the Three-Degree-of-Freedom Parallel Manipulator in a Spray-Painting Equipment

Robotica ◽  
2019 ◽  
Vol 38 (6) ◽  
pp. 1064-1081
Author(s):  
Guang Yu ◽  
Jun Wu ◽  
Liping Wang ◽  
Ying Gao
Keyword(s):  
Optimal Design ◽  
Parallel Manipulator ◽  
Optimization Design ◽  
Virtual Work ◽  
Kinematic Model ◽  
Geometrical Parameters ◽  
Parallel Mechanisms ◽  
Spray Painting ◽  
Conditioning Performance ◽  
Accuracy Performance

SUMMARYSpray-painting equipments are important for the automatic spraying of long conical objects such as rocket fairing. This paper proposes a spray-painting equipment that consists of a feed worktable, a gantry frame and two serial–parallel mechanisms and investigates the optimal design of PRR–PRR parallel manipulator in serial–parallel mechanisms. Based on the kinematic model of the parallel manipulator, the conditioning performance, workspace and accuracy performance indices are defined. The dynamic model is derived using virtual work principle and dynamic evaluation index is defined. The conditioning performance, workspace, accuracy performance and dynamic performance are involved in multi-objective optimization design to determine the optimal geometrical parameters of the parallel manipulator. Furthermore, the geometrical parameters of the gantry frame are optimized. An example is given to show how to determine these parameters by taking a long object with conical surface as painted object.

scholarly journals Effects of Geometrical Parameters of Internal Blown Flap and Its Optimal Design

2020 ◽  
Vol 38 (1) ◽  
pp. 58-67
Author(s):  
Rui Liu ◽  
Junqiang Bai ◽  
Yasong Qiu ◽  
Guozhu Gao
Keyword(s):  
Optimal Design ◽  
Design Method ◽  
Lift Coefficient ◽  
Angle Of Attack ◽  
Chord Length ◽  
Geometrical Parameters ◽  
Design Constraint ◽  
Design Variables ◽  
Flap Deflection ◽  
Stall Angle

The internal blown flap was numerically simulated. Firstly, a parameterization method was developed, which can properly describe the shape of the internal blown flap according to such geometrical parameters as flap chord length, flap deflection, height of blowing slot and its position. Then the reliability of the numerical simulation was validated through comparing the pressure distribution of the CC020-010EJ fundamental generic circulation control airfoil with the computational results and available experiment results. The effects of the geometrical parameters on the aerodynamic performance of the internal blown flap was investigated. The investigation results show that the lift coefficient increases with the increase of flap chord length and flap deflection angle and with the decrease of height of blowing slot and its front position. Lastly, a method of optimal design of the geometrical parameters of the internal blown flap was developed. The design variables include flap chord length, flap deflection, height of blowing slot and its position. The optimal design is based on maximum lift coefficient, the angle of attack of 5 degrees and the design constraint of stall angle of attack of less than 9 degrees. The optimization results show that the optimal design method can apparently raise the lift coefficient of an internal blown flap up to 1.7.

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