Damper is frequently used to suppress panel vibration and related vehicle interior noise. Unlike an unconstrained damper, a method to find material properties of a constrained damper is more complicated. This study presents a verified method for obtaining material properties of a constrained asymmetrical damper. The most important material parameters of this constrained damper are shear modulus, shear factor, and of course damping loss factor. The paper provides newly corrected equations to give proper numerical values of these parameters. The difference of natural frequencies between the test and the simulation using the estimated values is about 2 %, which shows that the estimation method is correctly presented. Important characteristics such as shear motion and wavelength of a composite beam constrained by a damper are also investigated. Finally, vibration response of a vehicle roof with a constrained damper is measured and is compared to the simulation. It is noticed that the correlation is much improved, comparing with the simulation based on old material properties.

阻尼器经常用于抑制面板振动和相关的车辆内部噪音。与无约束阻尼器不同，找到约束阻尼器材料属性的方法更为复杂。本研究提出了一种经过验证的方法，用于获取受约束的非对称阻尼器的材料特性。这种约束阻尼器最重要的材料参数是剪切模量、剪切因子，当然还有阻尼损耗因子。该论文提供了新修正的方程，以给出这些参数的正确数值。使用估计值的测试和模拟之间的固有频率差异约为 2%，这表明估计方法是正确的。还研究了受阻尼器约束的复合梁的重要特性，例如剪切运动和波长。最后，测量带有约束阻尼器的车顶的振动响应，并将其与模拟进行比较。值得注意的是，与基于旧材料属性的模拟相比，相关性得到了很大改善。