Acoustic and shock analyses
Modal and Frequency Analysis in Abaqus | Abaqus modal Analysis
Modal analysis is a technique used to understand how structures and systems vibrate when subjected to forces. It identifies natural frequencies, which are frequencies at which a system vibrates without external excitation, and mode shapes, representing unique patterns of motion. Engineers use modal analysis simulation to design systems resistant to unwanted vibrations, preventing resonance and potential damage.
Frequency response analysis evaluates a structure's reaction to specific excitations across varying frequencies, aiding in design optimization to mitigate fatigue damage caused by vibrations. In Abaqus software, Abaqus modal analysis identifies natural frequencies (Abaqus natural frequency) and mode shapes, while frequency response analysis predicts a structure's response to excitation across a frequency range.
In Abaqus modal analysis tutorial package, there are several modal analysis examples (modal analysis example): Workshop 1 analyzes the natural frequency of a water transfer tube to predict resonance occurrence or potential issues from vibrations. Workshop 2 simulates the dynamic analysis of a frame under a sudden load, determining modes, natural frequencies, and transient dynamic response.
Workshop 3 simulates free and forced vibrations of a wire under harmonic excitation, examining resonance phenomena with preloading and spring-damper configurations. These workshops demonstrate practical applications of modal and frequency response analyses in structural dynamics simulation and design.
Abaqus Explosion
An explosion is a rapid and violent release of energy, usually accompanied by a loud noise, heat, and pressure waves. Explosions can be caused by a variety of factors such as chemical reactions, combustion, nuclear reactions, or mechanical failure. Explosions can cause severe damage to buildings, infrastructure, and human life. To minimize the impact of such incidents, accurate and reliable simulation of explosions is crucial. Explosion simulation involves modeling the complex interactions of blast waves, shock waves, and debris with the surrounding environment. By simulating explosions, engineers and scientists can identify potential risks and develop effective safety measures. In this package, you will learn how to model explosions in different situations with practical examples, such as Air blast explosion simulation inside an RC room and Subsurface explosion simulation on buried steel pipelines.
Acoustic simulation in Abaqus
The study of mechanical waves in gases, liquids, and solids, including issues like vibration, sound, ultrasound, and infrasound, is the focus of the physics subfield of acoustics. A shock wave is a sort of disturbance that propagates across a medium faster than the local speed of sound. In industry, we use acoustic loading in cases such as hydraulic forming, SONAR, seismology, acoustic emission, vibration analysis, engine testing, etc. In this package, you will learn how to model acoustic loadings and shock loadings in four workshops: Deformation behavior of a stiffened panel subjected to underwater shock loading, Acoustic method-based numerical simulation of the electro-hydraulic forming process, Failure modes of concrete gravity dams simulation exposed to an underwater explosion, and Simulation of hull Coupled acoustic-structural response subjected to an underwater explosion.
