CAJ | 학술논문

提出对不可分离结构内损耗因子和耦合损耗因子的测量方法。对于内损耗因子测量，针对实际工程中子结构不可分离的问题，提出了用总损耗因子代替内损耗因子的方法。对于耦合损耗因子测量，利用已测得的内损耗因子结合稳态振动实验测得的能量可计算出结构间耦合损耗因子。同时分析了耦合损耗因子大小对总损耗因子代替内损耗因子差值的影响。仿真结果表明，当耦合损耗因子远小于内损耗因子时，内损耗因子和总损耗因子近似相等。对双圆柱壳耦合结构进行了实验验证，实验结果证明了该方法的正确性。
제출대불가분리결구내손모인자화우합손모인자적측량방법。대우내손모인자측량，침대실제공정중자결구불가분리적문제，제출료용총손모인자대체내손모인자적방법。대우우합손모인자측량，이용이측득적내손모인자결합은태진동실험측득적능량가계산출결구간우합손모인자。동시분석료우합손모인자대소대총손모인자대체내손모인자차치적영향。방진결과표명，당우합손모인자원소우내손모인자시，내손모인자화총손모인자근사상등。대쌍원주각우합결구진행료실험험증，실험결과증명료해방법적정학성。
Based on an actual project, a measurement method of dissipation and coupling loss factors for inseparable structures is presented. In this method, the dissipation loss factors can be considered as an approximation of total loss factors of the inseparable structures according to the method. Then the coupling loss factors can be calculated using the dissipation loss factors and steady vibration energy ratio. Additionally the difference between the total and dissipation loss factors affected by coupling loss factors is simulated. The result shows that the total loss factors are very close to the dissipation loss factors when the coupling loss factors are far less than the dissipation loss factors. Finally, the loss factors of a coupled bi-cylindrical shell structure are measured, and the experiment results show that the proposed method is reasonable and reliable.