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目的 研究在膝關(guān)節(jié)鎖定、膝關(guān)節(jié)固定角度以及膝關(guān)節(jié)自然狀態(tài)的站立條件下相同振動(dòng)頻率不同形式的振動(dòng)在人體下肢內(nèi)的傳遞情況.方法 以搖擺振動(dòng)和垂直振動(dòng)作為激勵(lì)施加與受試者足底,進(jìn)行三種站立條件下人體跟骨、外踝、脛骨外髁以及股骨外側(cè)髁等處的振動(dòng)測(cè)試,并運(yùn)用轉(zhuǎn)子動(dòng)力學(xué)全相位能量補(bǔ)償法進(jìn)行人體下肢的振動(dòng)傳遞分析,得到了搖擺振動(dòng)和垂直振動(dòng)過(guò)程中,三種不同的站立條件下人體跟骨、外踝、脛骨外髁以及股骨外側(cè)髁等處的振動(dòng)傳遞及振動(dòng)加速度的分布.結(jié)果 在相同頻率條件下,與搖擺振動(dòng)激勵(lì)方式相比,垂直振動(dòng)激勵(lì)下人體下肢標(biāo)記點(diǎn)加速度明顯減小,振動(dòng)傳遞比較大;對(duì)同一個(gè)受試者垂,直振動(dòng)在人體下肢的傳遞要比搖擺振動(dòng)的傳遞穩(wěn)定.此結(jié)果對(duì)于深入了解全身振動(dòng)對(duì)人體骨骼及肌肉的鍛煉及骨科疾病的防護(hù)有一定的借鑒作用.

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