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Development of Frequency Domain Dynamic and Acoustic Capabilities in LS-DYNA

A set of new features for frequency domain dynamic and acoustic computation have been implemented in LS-DYNA . They include random vibration and high-cycle fatigue analysis, frequency response functions, steady state dynamics, response spectrum analysis, and acoustic analysis based on boundary element methods or finite element ® methods. The objective of introducing these new features is to add capabilities to LS-DYNA to solve frequency domain vibration and noise radiation problems. This class of problems is very common in auto and aerospace industries and many other industries. The paper provides a brief introduction of the new features. Keywords for the features are introduced. Areas of applications are discussed. Some examples are given to illustrate how to use these features.