损耗因子

当CeO2添加量达4%（质量分数）时样品的介质损耗因子最低（≈0.2%）。

With the addition of 4 % ( mass factor ) CeO_2 , the dissipation factor of the sample shows the lowest value ( about 0.2 % ) .

样品的介质损耗因子随烧结温度的增加而减少，与样品的气孔率变化曲线相似。

The dissipation factor decreases with the lifting of sintering temperature , and its curve is similar to the porosity curve .

然后以耦合梁为例，通过有限元法得到两个梁之间的能量传递，并进而得到SEA所需的耦合损耗因子；

Next , the energy transmission between two coupled beams is obtained through FEM , and then the CLF used by SEA is built .

基于Hilbert变换的结构内损耗因子测试研究

Study on the Measurement of Structure 's Internal Loss Factor based on Hilbert Transform

损耗因子测量的Hilbert变换法

Hilbert Transform in Loss Factor Measurement

深入讨论了影响其SEA模型预测精度的主要因素是结构子系统的划分方式、统计能量分析参数的测量，以及有界空间内声振耦合损耗因子的正确计算。

The main elements to influent the precision of such SEA models is division of subsystem , measurement of SEA parameters and coupling loss factor between sound field and vibration .

基于响应面法建立阻尼复合结构的声辐射特性、模态频率和损耗因子与结构参数关系的数值模型，并运用MATLAB优化工具箱求取了相应约束条件下的最佳阻尼复合结构参数。

Damping composite structure parameters under corresponding constraints are solved base on sound radiation , modal frequencies and loss factors characteristics of damping composite structures model using MATLAB code .

对于SEA参数如模态密度、内损耗因子、耦合损耗因子等，针对不同的结构类型，简化了一系列的理论计算公式。

Aiming at different structure , it founds a series of formulae of SEA parameters , such as module density , damping loss factor ( DLF ) and couple loss factor ( CLF ) .

加入聚苯硫醚（PPS）的PTFE基复合材料的损耗因子曲线只出现一个明显的峰，峰值变大；

The loss factor curve of PTFE / PPS appears only one peak , and the loss peak value increases .

在VAOne中完成了导弹的统计能量建模并确定相应参数，其中内损耗因子由经验公式或经验值确定。

In Va One , the SEA model is established , and the modal parameters have been determined , among which the damping loss factor is determined by experience or empirical formula .

超细的空心玻璃微珠（GB）对橡胶的粘度无明显影响，但提高了橡胶的损耗因子；

Ultrafine hollow glass bead ( GB ) can markedly increase the loss factor of rubber but little effect on the rubber viscosity .

在分析了参数之间耦连关系后，提出了暂定刚度参数Y和阻尼材料损耗因子β，先求剪切参数x的解耦观点。

After analyzing coupling relationships of structural parameters , a viewpoint is brought forward that geometrical parameter Y and damping material loss factor β are temporarily decided before shear parameter x is determined .

SIS的硬段聚苯乙烯含量越高，损耗因子（tanδ）峰值温度和粘流温度越高。

The higher content of the polystyrene ( PS ) segments , the higher temperature of loss factor tan δ peak and its flowing .

文中通过动态力学分析仪DMA来表征三明治约束阻尼梁结构损耗因子随各种因素的变化情况。

This study attempts to characterize the damping behavior of sandwich beam by a new method with dynamic mechanical analyzer ( DMA ) .

通过用耦合板结构的平均导纳表示耦合损耗因子，将统计能量分析（SEA）的应用范围向低频做了扩展，从而使统计能量分析在中低频仍有较高的预测精度。

Coupling loss factor expressed by average mobility of coupled plates , the applied range of statistical energy analysis ( SEA ) is extended to medium and low frequency , which makes SEA precise in medium and low frequency .

用动态热机械分析仪（DMA）测试了多个频率下老化样品的损耗因子tanδ、损耗模量半高峰宽Dh/2。

Dynamic mechanical parameters , including loss factor tan δ and half-height width of loss modulus Dh / 2 at various frequencies , were measured by DMA .

同时，针对普通RAKE接收机在非相干解调时会引入射频损耗因子的问题，本文介绍了多径载波相干解调的概念。

At the same time , multi-path signal coherent demodulation RAKE receiver is also proposed to solve the problem of radio loss factors caused by non-coherent demodulation .

文中还分析了夹层板的阻尼比ψ与夹芯厚度hc，夹芯材料的阻尼损耗因子β以及夹芯剪切模量G之间的关系；

That the specific damping capacity W of sandwich plates related to the thickness hc , and the damping loss factor β, and the shear modulus G of the core layer were studied .

结构的阻尼损耗因子η除了受到模量比e，厚度比δ和平均半径比r的影响外，还与阻尼材料的损耗因子β成正比。

Besides affected by the influences of module ratio e , thickness ratio δ and average radius ratio , the damping loss factor η of structure is also in direct proportion to the loss factor of damping material β .

体系在辐照之后流变学行为与辐照前相比发生了很大的变化：在低频区的损耗因子峰消失，储能模量（G′）对频率的依赖关系减小，显示辐照对聚合物分子产生交联作用。

Irradiation with gamma-ray affects the rheological behavior of the system greatly , i. e. , the peak of loss factor disappears and the dependence of the G ′ on frequency becomes smaller , indicating cross-linking of the polymer molecules .

本文利用混响声场吸声系数α、立体角、平均自由程及壁面吸收声能等统计声学概念，用简单方法导出混响声场吸声系数α与统计能量分析（SEA）损耗因子η之间的关系。

Relation between acoustical absorption coefficient α and loss factor η in reverberant field with statistical energy analysis ( SEA ) was derived using concise statistical acoustical concepts , such as acoustical absorption coefficient α, three-dimension angle , mean free path and surface absorption energy .

根据0℃和60℃下的损耗因子tanδ值可知，3,4-IR可明显提高SBR或NR硫化胶的抗湿滑性能，并使滚动阻力有所降低。

According to the tan δ value at 0 ℃ and 60 ℃, 3,4-IR obviously improved wet-skid resistance and slightly decreased rolling resistance for SBR or NR.

在测定的温度和频率范围内，介电常数ε′和介电损耗因子ε〃可以用两组Cole-Cole圆弧则来描述。

The dielectric properties in the measured temperature and frequency region can be described by two groups of Cole-Cole plots.22 .

另一方面，在正交层板中，表面粘结压电陶瓷片的CFRP层板的损耗因子约比普通层板高5倍。

On the other hands , it was shown that CFRP laminates with surface bonded PZT sheets have about five times higher loss factors than plain CFRP laminates in case of cross-ply lamination .

利用Hoff夹层板理论研究约束阻尼结构的固有频率和模态损耗因子的计算问题。

The Hoff sandwich plate theory was applied to predict the natural frequencies and modal loss factors of constrained structure .

摘要论述了高分子聚合物约束阻尼复合结构损耗因子的有限元计算方法，并详细研究了模态应变能法的理论分析及其在ANSYS软件上计算约束阻尼复合结构损耗因子的计算程序。

Abstract The finite element method of loss factor prediction in constrained structures is re-viewed . And modal strain energy method is theoretically analyzed in detail and also ANSYS program is used to calculate the loss factor of polymer composite structures with constrained layers .

最终系统具有精度高、可便携、测速快等特点，可以方便地测量电阻、电容、电感的值及相关辅助变量如相角θ、损耗因子D、品质因数Q等。

Final system with high precision , portable , fast speed , etc , you can easily measure the value of the resistor , capacitor , inductor and related auxiliary variables such as the phase Angle theta and loss factor D , quality factor Q , etc.

材料的贮存模量随着频率的增大而有所增加，损耗因子在材料HDPE的熔点前随着频率的增大而降低，但在熔点后规律为50Hz<1Hz<25Hz<10Hz。

The storage modulus increased and the tan δ decreased with high frequency before the melting point of HDPE , but the rule was 50 Hz < 1 Hz < 25 Hz < 10 Hz after the melting point of HDPE .

实验结果表明，交联密度是影响聚氨酯阻尼材料损耗因子（tgδ）的重要因素，增加分子链中侧甲基（&CH3）数目，有利于提高材料的损耗因子值，拓宽阻尼温域；

The experiment results show : The crosslink density is an important factor to influence the loss factor of polyurethane damping materials ,? Increasing the number of lateral methyl of backbone contributes to raise the value of loss factor and broaden the damping temperature range ;

研究表明，硬脂酸钠（NaSA）改性硅酸盐空心纤维（HFS）在丁基橡胶（IIR）中可以形成良好的分散，提高了IIR的损耗因子（tanδ）；

According to the results , Sodium stearate ( NaSA ) modified hollow fibrillar silicate ( HFS ) can be well dispersed in isobutylene isoprene rubber ( IIR ) and enhance the loss factor ( tan8 ) of IIR .