The dependence of amplitude of first break for acoustic logging in cased borehole on the thickness of microannulus is studied in this paper with Finite Element Method (FEM).
本文采用有限元计算方法研究了微环厚度对套管井声波测井初至波幅度的影响。
The mixed method of boundary element and fractal finite element is adopted to solve the cracked structure-acoustic coupling problems.
应用分配形有限元和边界元相结合的方法于含裂纹的结构声相互作用问题。
Traditional boundary element methods with a full matrix equation for acoustic problems, have been met by a challenge in large scale scientific computation and numerical simulation in engineering.
文章提出将子波分析用于求解声学中的边界积分方程，能提高现有边界元方法解决工程问题的能力。
The effects of casing diameter on acoustic log in cased-borehole at free pipe situation are investigated with finite element method (FEM).
用有限元方法研究了自由套管井中不同直径的套管对声波测井的影响。
The finite element model of underwater structure with shafting is built by ANSYS. The characteristics of structural acoustic radiation are investigated by the direct boundary element method.
使用ANSYS有限元软件建立带有推进轴系的潜艇尾部结构模型，用直接边界元方法进行潜艇尾部结构水下辐射噪声特性分析。
The fundamental theories of acoustic finite element method and finite volume method, as well as the related software SYSNOISE and FLUENT are introduced.
介绍了声学有限元法和有限体积法的基本原理及相应的商业软件SYSNOISE和FLUENT。
The hyper-singular numerical integral occurred in the acoustic boundary element method has been dealt with using a regularization formulation.
利用正则化关系式处理了声学边界元方法中的超奇异数值积分。
The commercial software SYSNOISE which is based on the boundary element method is used to calculate the acoustic radiated field and radiation impedance of various sources.
研究了利用基于边界元方法的SYSNOISE软件来计算各种声源的声辐射。
Based on the finite element analysis results of the dynamic properties of the structure, the acoustic radiation of the structure is analysed using the results of the surface velocity distribution.
在用有限元法分析结构动态响应特性的基础上，利用有限元分析得到结构表面振动速度分布，分析表面阻尼处理板结构的声辐射。
This paper presents acoustic modes finite element analysis of the automobile passenger compartment.
讨论轿车乘坐室声学模态的有限单元分析方法。
Development of the finite element model for the acoustic-structural system.
建立声-结构耦合系统的有限元模型。
The main numerical modelling techniques for vibro-acoustic analysis are based on element based method, such as the finite element and boundary element method.
分析振动-声的数值方法主要是基于单元的方法，如有限元和边界元。
In this paper, a structural-acoustic model of a model tractor cab for finite element analysis was established, and the acoustic modal and the coupled structural-acoustic modal were analyzed.
该文以一拖拉机驾驶室模型为研究对象，建立了其声振耦合的有限元分析模型，计算了该驾驶室模型的声学模态和声振耦合模态。
The accuracy of Angle and range estimation of acoustic localization method based on four-element sensor array is influenced by target azimuth Angle.
四元十字阵的测向和测距精度受目标方位角的影响，而五元十字阵就可以克服这一缺点。
Based on the acoustic wave equation and structural motion equation, the vibration characteristics from the fluid loaded stiffened cylindrical double shell are studied by using finite element method.
基于流体的波动方程和结构的动力方程，利用有限元方法研究了考虑流固耦合时的双层加肋圆柱壳体的振动特性。
Firstly, the paper deeply describes related knowledge of acoustic horn as well as basic principle of (FEA) the finite element analysis method.
本文首先深入阐述了变幅杆的相关知识以及有限元分析的基本原理。
Based on the theory of elastodynamics, the interaction of elastic surface acoustic waves with surface-breaking defect is studied numerically by using the finite element method.
基于弹性动力学理论，采用有限元方法数值模拟了声表面波沿金属表面传播及其与表面缺陷相互作用的过程。
The radiation directivity of a complicated conformal array of underwater acoustic transducers is presented based on the boundary element method.
用边界元方法，给出了水声发射换能器共形阵各阵元的单元指向性以及基阵的自然波束指向性和束控波束指向性。
After carrying out a theoretical analysis of vibration and sound radiation of mill cylinder, simulation for acoustic field has been preceded by boundary element method.
本文对球磨机筒体的振动和声辐射进行了理论分析，然后结合边界元方法对筒体辐射声场进行了仿真分析。
Combining with the reciprocity principle of acoustic system and the interior noise finite element analysis, an approach fo;
结合“声学互易性原理”及车内噪声有限元分析，提出一种车内结构声源辨识的方法。
Combining with the reciprocity principle of acoustic system and the interior noise finite element analysis, an approach fo;
结合“声学互易性原理”及车内噪声有限元分析，提出一种车内结构声源辨识的方法。
应用推荐