不遺余力 spare no effort [efforts; pains]; be all out; be unsparing in one's efforts; do one's level best; do one's utmost to ...; go to all lengths; leave no stones unturned; make an all-out effort (to ...); make every endeavor; make the best of one's way; with all one's might; without sparing any effort
心余力拙 one's eyes are bigger than one's stomach.; though he still cherishes high aspirations, his strength falls short of his wishes.; more than willing but lacking the power to ...; bite off more than one can chew
Conversion formula between the strain mode and displacement mode is induced for the cantilever beam . present residual force method is improved and the new method is better than the old one for the engineering practice 推導出位移模態(tài)和應(yīng)變模態(tài)的換算公式,改進了現(xiàn)有的殘余力向量法,使之在工程實際應(yīng)用中有更現(xiàn)實的意義。
Based on structural dynamics , different damage diagnosis index , such as modal frequency variety , modal assurance criterion , co - ordinate modal assurance criterion , modal strain energy , remains force vector , modal strain , rigidity change , flexibility matrix , modal curvature and so on , are studied in this thesis 基于結(jié)構(gòu)動力學理論,本文論述多種損傷識別指標的基本原理和計算方法,主要包括:固有頻率變化率、模態(tài)置信因子、改進的模態(tài)置信因子、模態(tài)應(yīng)變能、殘余力向量、應(yīng)變模態(tài)、剛度變化、柔度矩陣、曲率模態(tài)等。