High-speed computation of very large-scale NVH problems.
OptiStruct is a state-of-the-art general-purpose FE solver. It boasts world-class performance in advanced NVH analysis and can solve very large problems at unparalleled speed. OptiStruct includes unique advanced features for NVH analysis and optimization, such as Auto-TPA analysis, an eigenvalue solver (AMSES) that supports large models, various model reduction capabilities, design sensitivity analysis, and an ERP response function that facilitates the optimization of the NVH performance of structures.
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basic information
<Advanced NVH Analysis> Equipped with excellent advanced features for NVH optimization, including one-step TPA (Transfer Path Analysis), power flow (vibration intensity) analysis, model reduction (CMS and CDS super elements), sensitivity analysis, and ERP (Equivalent Radiated Acoustic Power). <Main Noise and Vibration Analysis Methods and Functions> • Mode analysis for real and complex eigenvalue analysis • Direct and modal frequency response analysis • Random response analysis • Response spectrum analysis • Direct and modal transient response analysis • Buckling analysis, frequency response, and transient response analysis with nonlinear analysis results provided as initial loads • Rotor dynamics • Fluid-structure interaction (NVH) analysis • AMSES large-scale eigenvalue analysis solver • High-speed large-scale frequency response analysis solver (FASTFR) • Output of results at peak response frequencies (PEAKOUT) • One-step transfer path analysis (PFPATH) • Radiated sound analysis • Material property definition considering frequency dependence and porous structures • Brake noise analysis
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Applications/Examples of results
◆Improvement of sound quality by reducing pop noise generated by the microphone during recording Pop noise occurs when breath from the mouth hits the microphone forcefully, creating noises like "pop" or "zap." To address this phenomenon, we can utilize fluid simulation to examine microphone mesh shapes that do not cause sudden changes in pressure. ◆Performance evaluation of soundproof walls Building and evaluating actual soundproof walls can be time-consuming and costly. By constructing an open-space sound field model for simulation, we can evaluate the soundproof walls under development within a virtual sound field model, achieving a reduction in development time and costs. ◆Cabin noise generated by inputs to the tires from the road surface during vehicle operation When a vehicle is in motion, vibrational forces act on the tires from the road surface, causing various parts of the vehicle body to vibrate and generating noise (road noise) inside the cabin. By creating simulation models of the vehicle body structure and the acoustic space of the cabin, we can virtually evaluate the geometry of the suspension, bush characteristics, or the resonance characteristics of the vehicle body panels necessary for reducing road noise, enabling the development of a quiet vehicle in a short time and at low cost.
Detailed information
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Speaker radiation sound analysis
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Behavior of Infinite Boundary Elements and Sound Waves
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Behavior of Infinite Boundary Elements and Sound Waves
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Company information
Altair is a global company that provides software and cloud solutions in the fields of product development, high-performance computing (HPC), and artificial intelligence (AI). We offer technology that enables our customers across diverse industries to create a sustainable future and thrive in a connected world. For more details, please visit www.altairjp.co.jp.