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Full-Text Articles in Engineering
A Prediction Of The Acoustical Output Of A Golf Driver Head Using Finite Elements, Roger Sharpe
A Prediction Of The Acoustical Output Of A Golf Driver Head Using Finite Elements, Roger Sharpe
Master's Theses
A simulation was created using LS-DYNA® to determine the acoustical properties of a golf ball and golf driver head impact. LS-DYNA® has a coupled finite element analysis (FEA) and boundary element method (BEM) solver that uses the integral form of Helmholtz’s acoustic wave equation to deliver predicted sound pressure levels at predetermined acoustic points. Validation of the modeling was done on a simple plate donated by Titleist Golf. The plate was modeled and meshed using TrueGrid and impacted by a three layer golf ball model derived from “Tanka’s” paper on multilayered golf balls. The final converging model consisted of 10,900 …
An Effective Method In Bem For Potential Problems Of Thin Bodies, Yao-Ming Zhang, Yan Gu
An Effective Method In Bem For Potential Problems Of Thin Bodies, Yao-Ming Zhang, Yan Gu
Journal of Marine Science and Technology
The study of the effective methods dealing with problems with thin domains is an important and a difficult issue in boundary element method (BEM). For the special structures of thin bodies, the singular and nearly singular integrals often occur simultaneously in boundary integral equations (BIEs). Therefore, the conventional boundary element method (CBEM) is invalid to obtain accurate results. This paper based on the indirect variable regularized BIEs of plane potential problems, and a nonlinear variable transformation is introduced in order to improve the rapid variations of nearly singular integrals. By doing these, the boundary singular and nearly singular integrals can …