CAJ | 학술논문

目的:探讨镫骨的固有振动模式,以研究镫骨在能量传输过程中的有效运动方式.方法:通过人体左侧颞骨标本连续切片,获取镫骨及相关结构的图像数据,采用SURFDRIVER-GEOMAGIC-HYPERMESH-ANSYS联合建模求解技术,进行几何建模、材料模型选取、网格剖分、边界条件定义、Block Lanczos法模态分析求解.结果:模态频率结果显示,前20阶模态频率基本呈非线性单调递增趋势,前6阶频率值平缓,第7阶以后频率值陡增.前6阶模态振型可见镫骨有活塞运动、摆动、平移、转动等运动模式,各阶次5个节点(上、下、前、后、中)均伴有镫骨底板活塞运动,且第3阶5个节点镫骨底板活塞运动方向一致、幅度达最大值.结论:镫骨底板活塞运动伴随前6阶各频段,该形式是推动声波传递最有效的模式和镫骨的固有振动模式.
목적:탐토등골적고유진동모식,이연구등골재능량전수과정중적유효운동방식.방법:통과인체좌측섭골표본련속절편,획취등골급상관결구적도상수거,채용SURFDRIVER-GEOMAGIC-HYPERMESH-ANSYS연합건모구해기술,진행궤하건모、재료모형선취、망격부분、변계조건정의、Block Lanczos법모태분석구해.결과:모태빈솔결과현시,전20계모태빈솔기본정비선성단조체증추세,전6계빈솔치평완,제7계이후빈솔치두증.전6계모태진형가견등골유활새운동、파동、평이、전동등운동모식,각계차5개절점(상、하、전、후、중)균반유등골저판활새운동,차제3계5개절점등골저판활새운동방향일치、폭도체최대치.결론:등골저판활새운동반수전6계각빈단,해형식시추동성파전체최유효적모식화등골적고유진동모식.
Objective:To analyze intrinsic vibration modes of stapes so as to elucidate effective motion manner of the stapes in the process of energy transfer. Methods:From the digital images of serial sections of the human left temporal bone specimen, three-dimensional model of the stapes was reconstructed using SURFDRIVER software, modified using GEOMAG-IC software and optimized using HYPERMESH software. Then, the finite element model of the stapes was calculated with ANSYS software. Results:First 20 modal frequencies exhibited monotonic non-linear increase and an increase in the top 6 orders was gentle and that of last 14 orders was steep. The stapedial push-pull motion like a piston, swing, rotation or translation could be seen in all vibration modes. All orders were accompanied by the piston-like motion of five measured points at stapedial footplate. Directions of the piston-like motion of these five measured points at the third order were almost identical with the largest amplitude. Conclusion:The piston-like motion of the stapedial footplate exists in first 6-order bands, and this mode of motion is an intrinsic vibration mode of stapes and effective mode to promote acoustic transmission.