Bids Are Invited For Custom Bid For Services - Work Package For Product Simulation Activities - IRDE is looking for detailed simulation, optimization & documentation for the two design configurations (each comprising 02 units) which is being developed for airborne application at IRDE. These design configurations are: Configuration 1: Design and Development of Gimballed Electro-optical Payload with Segmented Aperture Configuration 2 Design and Development of Gimballed Electro-optical Payload with Retractable/Deployable System Both Configurations are an electro-optical system comprising of optical, mechanical and electronic components/sub-systems The following inputs will be provided by IRDE to the service provider to execute the tasks 1. 3D models for both Electro-optical payloads in Solid Works format. 2. Detailed description of all load cases and performance specifications which the subsystems are required to comply. 4. Details of all standard/purchase parts and detailed bill of material for both configurations. 5. All necessary software & hardware tools required to perform simulation activities. 6. Detailed simulation preprocessing data le static, dynamic, CFD, thermal and RCS simulation 7. The service provider may provide some suggestions to improve design performance, however, IRDE will be solely responsible for all design changes. The following are the responsibilities of the service provider: 1. The firm has to optimize the structure strength against environmental loads, thermal integrity of electronics components, CFD analysis and radar cross section analysis. 2. Prepare detailed design report capturing the various design simulations and submit the same along with the final design data There is requirement to carry out FE Analysis like Static, Dynamic (Modal, Random, Shock etc.), CFD and RCS optimization on both design configurations. The required job work is divided into two activities as follows: structural & thermal analysis - Review of assembly modelling this is to be performed to each sub-sub-assembly/sub- assembly/assembly level Geometry cleaning of sub-sub-assemblies/sub- assemblies/assemblies Geometry cleaning of large assembly and part management Geometry cleaning of other non-metallic material components and assemblies Meshing of parts, sub-assemblies and assembly Static Stress Analysis: This analysis is to be performed to estimate the stress and deflection of the system and mesh sensitivity analysis CAD modifications as per the findings of Static stress analysis and again perform static stress analysis. Drag force/stagnation pressure will be extracted from CFD analysis Modal Analysis: This analysis is to be performed to evaluate the Eigen value and eigenvector of the system. Modification of CAD model as per the mass participation factor and natural frequencies. Thermal analysis for analyses of heat generation and dissipation from electronic components. Complete assembly harmonic analysis for all three principal directions Complete assembly random vibration analysis for all three principal directions Complete assembly transient shock analysis for all three principal directions If any cad modification required after above mentioned FE analysis, CFD analysis and RCS analysis then All above FE analysis may need to perform again. Design Optimization needs to be performed considering all design aspects Tolerance Analysis: this analysis is to be performed to find out overall variation and effect of variation on components/assembly from imperfection in manufactured parts Modifications to be performed based on the analysis suggestion Final structural and thermal analysis Documentation of simulations performed, Description of work (CFD analysis and RCS optimization) Define the physical and computational domain of the problem. Develop or import the geometric representation of the domain. Generate the computational grid (mesh) that discretizes the geometry into smaller elements or volumes Specify boundary and initial conditions Import the geometry for RCS (EM) Simulation and define the mesh size a per the required frequency. Specify dedicated boundary conditions and material properties. Choose appropriate mesh type (structured, unstructured) and refinement levels based on the flow physics and geometrical complexity. Perform mesh refinement in regions where higher accuracy is required (e.g., near walls, in boundary layers, or in areas with sharp gradients). Selection of Solver and Numerical Schemes Perform the Grid Independency Studies Extract relevant data (drag coefficients, heat transfer rates, etc.) as required by the studys objectives. Based on the frequency of operation and electrical size. select the mesh size and solver for RCS Analysis. Create and/or import accurate 3D models of the payloads varying in size, shape, topology, and topography. Develop high-quality meshes for the geometries. Consider mesh density and refinement in critical areas such as leading edges, trailing edges, and interfaces to capture flow details accurately. Define boundary and initial conditions for the simulations, which will vary based on the payload configurations and thermal input conditions. Perform multiple simulation iterations to cover all different payload configurations, including changes in size, shape, topology, topography, and thermal inputs. Use post-processing tools to analyse the aerodynamic parameters in depth., Generate plots, contour maps, and other graphical representations to illustrate how variations in payload conditions affect aerodynamic characteristics. Based on the initial simulations, design proper boundary conditions and accurate mesh to the specific payload for final RCS analysis and fix the same for further work. Design and configure the internal geometries based on the various payload sizes, shapes, topologies, and topographies. Create detailed and optimized meshes for internal flow channels, ensuring adequate resolution at critical areas such as bends, junctions, and narrow passages to capture complex flow patterns and thermal effects. Define appropriate boundary and initial conditions. considering the different thermal input conditions and operational scenarios Perform a series of CFD runs for different payload configurations and thermal inputs to understand how these variables influence internal flow and temperature distributions. Utilize advanced post-processing tools to analyse flow patterns, temperature fields, and heat transfer characteristics. Evaluate critical outcomes such as heat flux distributions, temperature hotspots, and flow-induced stresses or vibrations. The payloads for which CFD runs are over, prepare those payloads for EM (RCS) simulations, imports those payloads in EM tool, clean the payloads according to EM simulation requirement, mesh the payloads as per required frequency of operation. Assign the incident plane wave from specific direction to determine the Monostatic or Bistatic RCS. Based on the electrical size and material properties of the payloads select the simulation solver for RCS analysis. Create detailed 3D models of the enclosure and all relevant components, ensuring that geometries are accurately represented. Generate a finite element or finite volume mesh that sufficiently resolves the geometrical features and is fine enough to capture thermal gradients, especially near expected hotspots. Define appropriate thermal boundary conditions, such as heat fluxes, convection coefficients, and ambient temperature settings based on the operating environment. Run thermal simulations using selected finite element/finite volume software to predict temperature distribution within the enclosure. Collect data on temperature distributions, focusing on identifying areas with elevated temperatures that could affect device performance or reliability. Do the RCS analysis for 3D enclosures once CFD and thermal simulations are over and provide the feedback of RCS Design or select appropriate heat sinks or other cooling solutions based on identified hotspots Perform final simulations incorporating heat sinks or cooling measures to verify that temperature levels are within safe operating limits. Compile detailed the methodology, simulations, findings, and design recommendations. RCS analysis of heat sinks-based frequency of operations. Collect all input parameters used in the simulations, including geometric details, mesh specifications, physical and boundary conditions, and solver settings. Ensure all data regarding different simulation cases is organized methodically to facilitate ease of access and comparison. Generate preliminary plots of the results, such as temperature distributions, flow velocity fields, pressure contours, etc. Prepare tables and other graphical representations of quantitative data, such as performance metrics and comparisons. Prepare the RCS data for the various Payloads analysis. Thermal load analysis for heat exchanger optimization if required as per above CFD analysis. Create a detailed outline of the report structure, defining which sections and information will be included (Introduction, Methodology, Results, Discussion, Conclusions, Recommendations). Start writing the report, beginning with easier sections such as the Methodology and progressing to more complex sections like Results and Discussion. Conduct initial reviews of drafted sections internally within the team to ensure technical accuracy and coherence Conduct thorough proofreading to correct typographical. grammatical, and formatting errors. Prepare the final version of the report for the submission. Total Quantity :
