## ESTECH Original Software

ESTECH is developing various kinds of original software based on expertise of engineers and accumulated know how over the years. Every software the company developed has been applied to the actual consulting project respectively.

If any needs to develop new software exists, please feel free to contact us

The followings are introductions of these software along with examples which shows how the software helps out test and simulation analysis work of our clients.

### Physical Test Assisting Software

#### Moment of inertia calculation of structure

The software calculates moment of inertia of structure by quite simple way of testing.

#### Test Modal Model Development

Create test modal models in order to apply the output from test modal analysis to FE analysis.

#### Simulation of translational and rotational motion assuming objective as a rigid body structure

The motion of an objective structure is analyzed by assuming it as a rigid body as well as calculating 6 directional rigid body motion at arbitrary point on the structure.

### CAE Model development

#### Moment of inertia calculation of structure

The software calculates moment of inertia of structure by quite simple way of testing.

#### Test Modal Model Development

Create test modal models in order to apply the output from test modal analysis to FE analysis.

#### Analytical Modal Model Development

In order to solve a FE model efficiently, create analytical modal model and reduce its DOF is required, which is much more simple way comparing Super Element method.

#### Noise Absorbing and Insulating Panel Model development

The model works to simulate trim parts such as floor carpet, dashboard insulator, which reside both noise absorbing and insulating functions.

#### Elastic Vibration Model development for Control Analysis

When the control analysis by Simulink is conducted, the software assists to import elastic vibration model of objective structure which has reduced DOF.

### Efficiency Improvement of Calculation

#### Streamlining FE model calculation by abridgement of the model

Abridgement of a portion of large size of FE model by reducing its DOF makes streamlining of the calculation.

#### Principal mode extraction

Complex phenomena with a lot of natural modes can be simplifies by extracting principal modes which highly contribute to response waveform.

### Solvers

#### High speed engine elastic vibration analyzer under operating condition

Coupling crankshaft and cylinder block in frequency domain, which is very unique and innovative technology, enable to analyze an engine elastic vibration in a quite short period of time.

#### Modal model recovery

Response of all system of original structure by recovering modal model is calculated.

#### Frequency response analysis including frequency/amplitude dependency

Develops model of bush like hydraulic engine mounting, which has nonlinear characteristics like frequency and amplitude dependency and calculates the frequency response.

#### Calculation of inertia and elastic role axes of an engine

Calculation of inertia and elastic role axes of a target engine is indispensable to design the engine mounting system.

### Analyzer

#### Principal Mode Analysis

Dominant modes for specific input are identified for studying high frequency phenomena and/or large size model with high modal density.

#### Simulation of translational and rotational motion assuming objective as a rigid body structure

The motion of an objective structure is analyzed by assuming it as a rigid body as well as calculating 6 directional rigid body motion at arbitrary point on the structure.。

#### Small elastic deformation analysis in a rigid body motion

The small deformation is calculated by subtracting rigid body deformation from absolute deformation of the structure.

#### Optimal and practical trans-path analysis (TPA)

There are various kinds of TPA methods in the testing field, selection of the optimal method is quite important to reach right solution avoiding wrong solution efficiently.

### Postprocessor

#### Natural mode contribution display

Natural modes as well as panel contributions derived from MSC Nastran are displayed effectively.

#### Identification of unstable modes caused by self-induced vibration

Identifying a mechanism of self-induced vibration derived from friction conduces countermeasures to avoid the vibration.

#### I-deas postprocessor for MSC Nastran response analysis

The postprocessor converts to I-deas universal file from MSC Nastran frequency and transient response output.

#### Splitting large size of op2 file in MSC Nastran

Splitting op2 file of natural frequency of large size model in MSC Nastran output makes post process easier.

### Design Aid

#### Help to design an elastic mounting/suspension structure like engine mount system

Calculation of inertia and elastic role axes of a target engine provides assistance to design the engine mount system.

### List of the Software

#### ESTECH.AxisDesign

Instantly calculate a location of rigid body inertia role axis and elastic role axis, role stiffness of rigid body, natural frequency and mode( kinetic energy distribution) by fixing mass of rigid body, layout and coefficient of stiffness of elastic mounting and direction cosine of input torque.

#### ESTECH.ff10

Create I-deas universal file from the output of MSC Nastran frequency and transient response analysis

#### ESTECH.[ I ]property

Calculate inertia properties such as mass, center of gravity and moment of inertia from frequency response functions of target structure applying least-square method.

#### ESTECH.MODAL2FEM

Convert to an equivalent I-deas and MSC Nastran model from physical test and/or analytical modal parameters.

####
ESTECH.NAST^{+}

Enhance functions of MSC Nastran substantially. Details are on page 143.

#### ESTECH.PathFinder

Integrated tool for TPA including the following functions such as dynamic spring stiffness approach, inverse matrix approach, operational TPA approach, furthermore , ESTECH original assembly TPA approach and multi-coherence contribution analysis capability are included.

#### ESTECH.PlotTool

Display the output of MSC Nastran contribution analysis.

#### ESTECH.PRIMESPEC

Calculate engine rigid body excitation forces working on a power plant by inserting primary specification of the engine dominant moving parts and combustion pressure as inputs.

#### ESTECH.PSISTOP

Calculate an engine rigid body vibratory force to power-plant and input torque to crank shaft at an engine stop and start timing.

#### ESTECH.PS-X

Calculate very rapidly an elastic vibration of an automobile reciprocate engine under operating condition typically, which is quite an unique and innovative FE simulation software.

#### ESTECH.RIDE

Calculate frequency response of system model with nonlinear connectors.

#### ESTECH.Rmotion

Calculate motion of arbitrary points on a structure which is considered as a rigid body from its motion data by applying least-square method.

#### ESTECH.rmRBM

Applying least-square method enables to calculate response of an elastic deformation subtracting rigid deformation derives from MSC Nastran SOL101(Static Analysis)/SOL103(Eigen Value Analysis)/SOL101 and 111(Frequency Response Analysis)/SOL109 and 112(Transient Response Analysis).

#### ESTECH.SimFlex

Import an elastic body model into a Simulink control analysis model.

#### ESTECH.Squeal

MSC Nastran complex eigenvalue analysis generates eigenvalue plots on complex plane, mode contribution plots, eigenvalue shift plots as well as eigenvalue instability indexes.

#### ESTECH.ssop2

Splitting op2 file of the output from MSC Nastran real eigenvalue analysis makes easier to handle the output by post processor tool.