Acoustic Performance of a Barrier Embedded With Helmholtz Resonators Using a Quasi-Periodic Boundary Element Technique
نویسندگان
چکیده
منابع مشابه
Wave propagation in a duct with a periodic Helmholtz resonators array.
Helmholtz resonator is often used to reduce noise in a narrow frequency range. To obtain a broader noise attenuation band, combing several resonators is a possible way. This paper presents a theoretical study of sound propagation in a one-dimensional duct with identical side-branch resonators mounted periodically. The analysis of each resonator was based on a distributed-parameter model that co...
متن کاملNumerical modeling of nonlinear acoustic waves in a tube connected with Helmholtz resonators
Acoustic wave propagation in a one-dimensional waveguide connected with Helmholtz resonators is studied numerically. Finite amplitude waves and viscous boundary layers are considered. The model consists of two coupled evolution equations: a nonlinear PDE describing nonlinear acoustic waves, and a linear ODE describing the oscillations in the Helmholtz resonators. The thermal and viscous losses ...
متن کاملTerahertz quantum cascade lasers with quasi-periodic resonators
We report simulations and experimental results of THz QCLs with quasi-periodic resonators based on a Fibonacci sequence. Terahertz quantum cascade lasers were first demonstrated in 2002 [1] and have since undergone rapid development. One of the most active areas of reasearch into these devices has been the development of devices emitting in a single longitudinal mode through the use of distribu...
متن کاملQuasi-periodic Green’s functions of the Helmholtz and Laplace equations
A classical problem of free-space Green’s function G0Λ representations of the Helmholtz equation is studied in various quasi-periodic cases, i.e., when an underlying periodicity is imposed in less dimensions than is the dimension of an embedding space. Exponentially convergent series for the free-space quasi-periodic G0Λ and for the expansion coefficients DL of G0Λ in the basis of regular (cyli...
متن کاملApplication of Decoupled Scaled Boundary Finite Element Method to Solve Eigenvalue Helmholtz Problems (Research Note)
A novel element with arbitrary domain shape by using decoupled scaled boundary finite element (DSBFEM) is proposed for eigenvalue analysis of 2D vibrating rods with different boundary conditions. Within the proposed element scheme, the mode shapes of vibrating rods with variable boundary conditions are modelled and results are plotted. All possible conditions for the rods ends are incorporated ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Acta Acustica united with Acustica
سال: 2017
ISSN: 1610-1928
DOI: 10.3813/aaa.919074