エヌ・エス・ティ List of Products and Services

This is a collection of case studies on structural analysis, buckling analysis, thermal analysis, and more of mechanical elements. Additionally, there are analysis cases not included in the collection, so please contact us if you are interested in any specific analysis case.

• Other machine elements
• Structural Analysis
• Stress Analysis

This is a collection of analysis examples including seismic motion analysis of structures, wind analysis of high-rise buildings, analysis of liquid storage tanks under seismic conditions, natural frequency and frequency response analysis of reinforced concrete (SRC) structures, and acoustic analysis of audio rooms. Additionally, there are analysis cases not included in the collection, so please contact us if you are interested in any specific analysis cases.

• Structural Analysis
• Stress Analysis
• Acoustic Analysis

This is a collection of analysis examples including model analysis of railway vehicles, sloshing analysis of ships, airflow analysis inside railway vehicles, large-scale finite element analysis of train vehicle dynamics, and hull strength analysis. Additionally, there are analysis cases not included in the collection, so if you are interested in any specific analysis case, please feel free to contact us.

• Structural Analysis
• Stress Analysis
• Thermo-fluid analysis

This is a collection of analysis examples including the stability (behavior) analysis of washing machines, eigenvalue optimization analysis of magnetic heads, frequency response analysis of traveling wave ultrasonic motors, and induction heating analysis, among others. Additionally, there are analysis cases not included in the collection, so please contact us if you are interested in any specific analysis examples.

• Thermo-fluid analysis
• Magnetic field analysis/electromagnetic wave analysis

【Case Overview】 ■Product Name: Simcenter Femap with Nastran There has been an image that Super Elements (SE) are only applicable in the aerospace and automotive fields and can only be used by a few dedicated analysts. There has been no pre-post that fully supports SE analysis, and the data creation process has been complicated, which has hindered its widespread adoption until now. Simcenter Femap supports external Super Elements from Simcenter Nastran, making SE analysis accessible to everyone.

• Other analyses

**Case Overview** ■Product Name: Simcenter Femap with Nastran ■Industry: Mechanical Components Simcenter Nastran allows for various analyses considering pre-tensioned bolts (linear static analysis, nonlinear static analysis SOL601, linear buckling analysis, etc.). Using the Simcenter Femap interface, modeling of bolt connections with beam elements, bar elements, and solid elements, as well as the setting of bolt loads, can be done easily. This case modeled the bolts with bar elements and solid elements and compared the results from both. Two brackets with a surface static friction coefficient of 0.15 were fastened with M10 bolts. The axial force was set to 150 kgf, one side was fixed, and linear static analysis was performed (Figure 1). From the comparison of the results of the bar elements and solid elements, it was found that the maximum and minimum Mises stress and maximum and minimum displacement of the two brackets were the same for both methods. ● For other features and details, please refer to the catalog.

• Structural Analysis
• Stress Analysis
• Other analyses

"HEEDS" is a multi-domain analysis and design exploration tool that explores the design space, achieving reductions in design/development time and lifecycle costs. By utilizing this product, designers and engineers can quickly find innovative solutions that meet all performance criteria. Additionally, it features a wealth of direct interfaces compatible with commercial CAD/CAE tools and an intuitive GUI for easy operation. We also offer trials, so please feel free to contact us. 【Features】 ■ Trial available ■ Explores the design space, achieving reductions in design/development time and lifecycle costs ■ Strengths include ease of use, advanced design space exploration technology, and high-quality service *For more details, please download the PDF or feel free to contact us.

• Software (middle, driver, security, etc.)

"Simcenter FLOEFD for Solid Edge" is an add-on fluid analysis application that runs on Solid Edge (3D CAD) and achieves "speed," "ease," and "high precision." By adopting a voxel mesh, mesh creation is simplified. It automatically determines the boundaries between solids and fluids, allowing tasks that typically take several days with conventional CFD software to be completed in just a few minutes. It can automatically recognize areas where mesh sizes should be set finer, such as boundaries between solids and fluids or narrow flow paths, and can be configured to any desired size. 【Features】 ■ Add-on tool that can be used on CAD ■ Standardized setup procedures ■ Coupling with structural analysis is possible *For more details, please download the PDF or feel free to contact us.

• Other analyses

"Simcenter STAR-CCM+" is a general-purpose thermal fluid analysis software that can manage data in a single file. Since it is an integrated environment, automating work processes such as computation execution and result evaluation is easy. With its rich physical models and features, it can analyze various phenomena in a complex manner. [Features] ■ Integrated environment ■ Automatable workflow ■ Flexible and highly robust modeling capabilities ■ Comprehensive multiphysics ■ Abundant physical models *For more details, please download the PDF or feel free to contact us.

• Software (middle, driver, security, etc.)

We would like to introduce the "Magnet Demagnetization Analysis of Interior Permanent Magnet Synchronous Motor (IPMSM)" conducted by our company. The analysis mode is transient response analysis, and the motor specifications are 3-phase, 8-pole, 48-slot, with distributed winding. The driving condition is 3,000 min-1. As a result of the analysis, it was found that the demagnetization occurs at locations on the rotor core where the magnetic flux density is high, and it was also determined that the surrounding temperature of 125°C affects the coercivity reduction of Nd-Fe-B magnets. 【Analysis Conditions (Partial)】 ■ Analysis Mode: Transient Response Analysis ■ Motor Specifications: 3-phase, 8-pole, 48-slot, distributed winding ■ Driving Condition: 3,000 min-1 ■ Magnet Surrounding Temperature: 125°C ■ Location of Electrical Short Circuit: Between Stator Windings *Details of the case can be viewed via the related link. For more information, please feel free to contact us.

• Contract Analysis

We would like to introduce the "Air Gap Magnetic Flux Density Analysis of Interior Permanent Magnet Synchronous Motors (IPMSM)" conducted by our company. The analysis mode used was transient response analysis, and the driving conditions were no load at 3,000 min-1, with the analysis executed at the 45° position in the right diagram for 1/8 of the section (2D). As a result of the analysis, it was found that the magnetic flux density penetrating the air gap between the stator and rotor changes relative to the excitation timing of the stator coil with respect to the rotating rotor. Therefore, analyzing the dynamic behavior is considered an effective approach. 【Analysis Conditions】 ■ Analysis Mode: Transient Response Analysis ■ Motor Specifications: 3-phase / 8-pole / 48-slot, distributed winding ■ Driving Conditions: No load / 3,000 min-1 ■ Analysis executed at the 45° position in the right diagram for 1/8 of the section (2D) ■ The air gap (air layer) between the stator and rotor is processed in 4 layers *For detailed information about this case, please refer to the related links. For more details, feel free to contact us.

• Contract Analysis

We would like to introduce the "Thrust Force Analysis of Linear Actuators" conducted by our company. In this case study, we analyzed the impact of differences in magnet length on the thrust direction and stroke of the motor. As a result of the analysis, we confirmed the presence or absence of magnetic saturation in the magnetic flux field circuit under the driving conditions of the motor, and found that magnetic saturation did not occur and the magnetic flux field was stable. 【Analysis Conditions】 ■ Driving Conditions: Input Current DC-1A/Phase ■ Stroke Operation Time: 4ms (Design Stroke Time Range 1–3ms) 　※ Design Stroke: -10mm to 10mm ■ Magnet Length Variation Width: -1mm, +3mm, +7mm (based on 60mm width) 　※ The magnet length was set as a variable, and calculations were performed with the above three variation widths. *Details of the case study can be viewed through the related links. For more information, please feel free to contact us.

• Contract Analysis

We would like to introduce the "Analysis of Power Transformer Stray Losses" conducted by our company. The analysis mode is frequency response analysis (Time Harmonic), and the rated capacity of the power transformer is 100 MVA. The input frequency is 50 Hz/AC. As a result of the analysis, it was found that the leakage magnetic flux generated from the transformer coil is significantly and extensively collected at the shunt wall. 【Analysis Conditions】 ■ Analysis Mode: Frequency Response Analysis (Time Harmonic) ■ Power Transformer Rating: 100 MVA ■ Input Frequency: 50 Hz/AC ■ Shunt Wall (Flux Collector): Magnetic Material ■ Frame Material, Tank Material: Carbon Steel *Details of the case can be viewed through the related links. For more information, please feel free to contact us.

• Contract Analysis

We would like to introduce our analysis of "Cabin Acoustic Characteristics of Tracks Using Acoustic Coupled Analysis Function." In recent years, considering low noise environments has become very important. It is effective to use finite element method analysis to understand the acoustic characteristics of the cabin during the design phase and to reduce noise transmission to the operator through structural considerations. In this case, we used the Simcenter Nastran structural-acoustic coupled analysis function to model the vehicle body structure and the acoustic space within the cabin, conducting a coupled frequency response analysis to determine the acoustic transmission characteristics from the vehicle body mounting points to the operator's ear position. 【Case Overview】 ■ Function Used: Simcenter Nastran Structural-Acoustic Coupled Analysis Function ■ Analysis Content - Model the vehicle body structure and the acoustic space within the cabin - Conduct coupled frequency response analysis - Determine the acoustic transmission characteristics from the vehicle body mounting points to the operator's ear position *Detailed information about the case can be viewed through the related links. For more details, please feel free to contact us.

• Contract Analysis

We would like to introduce the "Thermal Fluid Analysis of Mufflers" conducted by our company. By combining "Femap Thermal" and "Femap Flow," we calculated the flow of exhaust gases within the muffler and the temperature distribution of the muffler due to high-temperature exhaust. We performed thermal fluid analysis focused on the muffler, determining the temperature difference of the exhaust at the inlet and outlet, the flow of exhaust gases within the muffler, and the temperature of the surface of the muffler structure, confirming that we could obtain the parameters necessary for design. 【Case Overview】 ■ Products Used - Femap Thermal - Femap Flow ■ Analysis Content - Thermal fluid analysis focused on the muffler *For more detailed information about the case, please refer to the related links. For further inquiries, please feel free to contact us.

• Contract Analysis

We would like to introduce the "Optimization Analysis of Connecting Rod Shape" conducted by our company. In this case, we sought the shape that minimizes the equivalent stress while maintaining volume when compressive and tensile loads are applied to the connecting rod. Additionally, we performed optimizations that included the condition for minimizing the elliptical deformation of the large end hole under tensile load, as well as optimizations that maintain stress and displacement while minimizing volume. 【Stress Minimization Results】 ■ Equivalent Stress Reduction Rate - Under compressive load: approximately 25% - Under tensile load: approximately 28% ■ Number of Optimization Iterations: 50 ■ Analysis Time: 21 minutes *Detailed information about this case can be viewed through the related links. For more information, please feel free to contact us.

• Contract Analysis

We would like to introduce the "Nonlinear Transient Analysis of Brake Rotors" conducted by our company. The coupling of thermal and structural analysis is necessary due to the heat transfer that occurs when the rotating rotor and pads come into contact. Friction generates heat, leading to stress due to uneven thermal expansion. In this case, we fully constrained the nodes around the holes of the rotating rotor and performed thermal stress analysis by applying heat flux and heat transfer coefficients to the inner and outer surfaces of the rotating rotor, as well as heat transfer coefficients to the surfaces of the fins and hats. [Analysis Overview] - Fully constrained the nodes around the holes of the rotating rotor - Applied heat flux and heat transfer coefficients to the inner and outer surfaces of the rotating rotor, as well as heat transfer coefficients to the surfaces of the fins and hats *For detailed information about this case, please refer to the related links. For more details, feel free to contact us.

• Contract Analysis

We would like to introduce our analysis on "Pressure Distribution Analysis of Brake Pads Using Nonlinear Analysis." To reduce brake noise, it is necessary to control the rigidity of the caliper and the pads. In examining the rigidity of the caliper and pads, it is important to understand the rigidity distribution caused by the pressure distribution between the disc and the pads. The model for this case consists of a caliper, piston, plate, and pads. We applied pressure to the piston and caliper and conducted a nonlinear static analysis that includes the nonlinear friction coefficient between the pads and the disc. [Case Overview] ■ Model: Caliper, Piston, Plate, and Pads ■ Analysis Content - Pressure was applied to the piston and caliper, and a nonlinear static analysis including the nonlinear friction coefficient between the pads and the disc was conducted using "Simcenter Nastran (SOL401)." *For more detailed information about this case, please refer to the related links. Feel free to contact us for further inquiries.

• Contract Analysis

We would like to introduce our analysis titled "Behavior Analysis of Diaphragm Springs Using Nonlinear Static Analysis." When a load is applied to a disc spring, the shape of the spring is complex, leading to not only bending but also twisting and buckling. Additionally, the support conditions are not constant, making it impossible to determine the load and stress using simple cantilever beam theory. In this analysis example, we were able to reproduce the jumping phenomenon of a diaphragm spring used in automotive clutches by conducting nonlinear static analysis on its behavior. 【Case Overview】 ■ Analysis Content: Nonlinear Static Analysis ■ Analysis Result: Reproduction of bidirectional jumping deformation of the diaphragm spring *For more detailed information about this case, please refer to the related links. For further inquiries, feel free to contact us.

• Contract Analysis