Dynamical stability of mechanism system 機(jī)構(gòu)系統(tǒng)的動力學(xué)穩(wěn)定性研究
This paper introduces the wheel mechanism design of in - pipe micro - robot , proposes the dynamical model of restricted in - pipe micro - robot , and analyzes its dynamical stability 提出了管道內(nèi)受限微機(jī)器人的動力學(xué)模型,并分析了微型管道機(jī)器人的動力學(xué)穩(wěn)定性。
Because cable - stayed bridge has many merits such as long span , light and beautiful structure , well air dynamical stability , single framework style and so on , it becomes the mostly bridge style in bridge construction 斜拉橋由于具有跨越能力大、結(jié)構(gòu)輕巧美觀、受力明確、空氣動力穩(wěn)定性好、結(jié)構(gòu)型式簡潔等優(yōu)點(diǎn),正成為橋梁建設(shè)的最主要的橋型之一。
Taking four spatial truss structures as examples , the structural dynamical stability analyze was carried out applying the stress rate criterion , and the data of the stress rate criterion analysis was compared with those of the displacement criterion analysis 以四種突間桿系結(jié)構(gòu)為例,應(yīng)用應(yīng)力變化率準(zhǔn)則進(jìn)行了結(jié)構(gòu)的動力穩(wěn)定分析,并將結(jié)果同位移準(zhǔn)則分析的結(jié)果進(jìn)行了比較。
Four prestressed projects set with two different basis was compared the static force stability , the prestressed project of less internal fore and displacement was obtained . according to this project , three projects of different cable form were given to compare the structural static stability , overall stability and dynamical stability 在此方案的基礎(chǔ)上,確定了三個不同的布索方案,進(jìn)行靜力、整體穩(wěn)定和動力性能比較,得到了布索圈數(shù)對結(jié)構(gòu)靜力性能、整體穩(wěn)定性能和動力性能的影響。
In this paper , through the self oscillation analysis and the earthquake response analysis , the frequency , the oscillation mode , the transverse and vertical earthquake response of the different cable form projects and the relevant single - layer spherical latticed shell were compared , the effect of different cable form projects to the structural dynamical stability was obtained 本文對選定的三個布索方案進(jìn)行了自振特性分析和地震響應(yīng)分析,比較了各方案的頻率、振型以及橫向和豎向地震反應(yīng),并和相應(yīng)單層球面網(wǎng)殼進(jìn)行了對比,得到了布索圈數(shù)對結(jié)構(gòu)動力性能的影響。
In the paper , present condition and developing tendency of forklifts are presented , design plans of a new developed electrical - driven universal - way forklifts - cpd2hc ~ are introduced , dimensions of its changing direction trapezoid are designed by means of optimized method , static and dynamical stabilities of the forklifts are studied and tested through build model , given conclusions from above researches are of great important to raise design quality and working performance of this kind of forklifts , which lay the foundations of developing more practical , durable and advanced productions 論文闡述了叉車的現(xiàn)狀和發(fā)展趨勢,介紹了新研制的cpd2hc型電動萬向叉車的設(shè)計方案,并利用優(yōu)化的方法對轉(zhuǎn)向梯形臂的幾何尺寸進(jìn)行了優(yōu)化設(shè)計,論文還研究和驗(yàn)證了電動萬向叉車的靜態(tài)穩(wěn)定性和動態(tài)穩(wěn)定性,所得結(jié)論對于提高這種型式叉車的設(shè)計質(zhì)量和工作性能有重要的意義,為研制更實(shí)用、更耐用、性能更先進(jìn)的產(chǎn)品奠定了基礎(chǔ)。
In this paper , the suspen - dome structure of the gymnasium for olympic badminton game in 2008 was used for example . three projects of different cable form was analyzed the static stability , overall stability and dynamical stability . in this paper , the basis of setting prestress for large span suspend - dome was discussed first 本文以我校奧運(yùn)羽毛球比賽館的弦支穹頂屋蓋結(jié)構(gòu)(跨度93米)為工程應(yīng)用對象,采用大型通用有限元分析軟件ansys ,選擇不同的布索方案進(jìn)行了靜力、整體穩(wěn)定和動力性能分析。