A modified and simplified oscillator device is designed and manufactured to investigate the effects of contact roughness and bolt arrangements on energy dissipation caused by joint damping. Three types of surface roughness and five different bolt arrangements are discussed. Identification of Iwan model based on experimental data is carried out. It is indicated that rough surface dissipates more energy than smooth one. Specimens with more bolts dissipate relatively more energy. When bolt number is consistent, the series type dissipates more energy than the parallel type. Experimental data show a good stability and accuracy of the proposed oscillator device. The identified Iwan model provides a good conformity with the reconstructed hysteresis loop. The four-parameter Iwan model can well describe the damping property of joints with different surface roughness and bolt arrangements.

设计并制造了一种经过改进和简化的振荡器设备，以研究接触粗糙度和螺栓布置对接头阻尼引起的能量耗散的影响。讨论了三种类型的表面粗糙度和五种不同的螺栓布置。基于实验数据对Iwan模型进行了识别。结果表明，粗糙的表面比光滑的表面耗散更多的能量。带更多螺栓的样品会耗散相对更多的能量。当螺栓数量一致时，串联型比并联型耗散更多的能量。实验数据表明，所提出的振荡器装置具有良好的稳定性和准确性。所识别的Iwan模型与重构的磁滞回线具有良好的一致性。