航空發(fā)動(dòng)機(jī)推力銷載荷計(jì)算及應(yīng)變分析*

雷曉波，張 強(qiáng)， 張永峰

(中國(guó)飛行試驗(yàn)研究院，陜西 西安 710089)

航空發(fā)動(dòng)機(jī)推力銷載荷計(jì)算及應(yīng)變分析*

雷曉波，張 強(qiáng)， 張永峰

(中國(guó)飛行試驗(yàn)研究院，陜西 西安 710089)

介紹了兩種推力銷應(yīng)變橋路，來(lái)測(cè)量航空發(fā)動(dòng)機(jī)推力；根據(jù)發(fā)動(dòng)機(jī)推力銷的實(shí)際承力形式，推導(dǎo)出推力銷載荷分布公式；利用ANSYS對(duì)推力銷有限元模型進(jìn)行了載荷仿真，并分析了推力銷所承受的推力與應(yīng)變之間的關(guān)系。通過(guò)對(duì)剪力應(yīng)變橋和彎矩應(yīng)變橋?qū)Ρ确治霭l(fā)現(xiàn)，剪力橋和彎矩橋都與推力呈線性關(guān)系；從應(yīng)變數(shù)值大小來(lái)看兩種橋路均具有工程實(shí)用性，但從誤差分析來(lái)看彎矩橋更具操作性。這些結(jié)論為后期開(kāi)展推力銷載荷標(biāo)定試驗(yàn)提供了理論參考。

航空發(fā)動(dòng)機(jī)；推力銷；矢量推力；應(yīng)變 ；ANSYS

Abstract: Two kinds of strain bridge to build mathematical equations are introduced between thrust and strain in aero-engine thrust pin. Based on the actual bearing strength form of thrust pin, mechanics equation on the load distribution was deduced. the structure static analysis was simulated by using ANSYS software. The simulation showed whichever bending area or shear area the relation between thrust and strain were linear well. Strain calculations value in bending strain area and in shear strain area are very close, and so two strain bridges above are both practical in engineering. But from error analysis the bend strain bridge was much smaller and more operational than the other. These conclusions provided theoretical reference in carrying out load calibration tests in thrust pin.

Key words: aero-engine; thrust pin; vector thrust; strain; ANSYS

0 引 言

推力矢量技術(shù)是第四代先進(jìn)戰(zhàn)斗機(jī)的標(biāo)志性技術(shù)之一，是指飛機(jī)的動(dòng)力裝置配裝推力矢量噴管后，發(fā)動(dòng)機(jī)除了為飛機(jī)提供前進(jìn)方向的推力外，還能同時(shí)或單獨(dú)在飛機(jī)的俯仰、偏航、橫滾和反推力等方向上提供推力分量，用以補(bǔ)償或取代由飛機(jī)舵面產(chǎn)生的外部氣動(dòng)力，從而提高飛機(jī)的飛行控制能力。推力矢量技術(shù)的實(shí)施，賦予飛機(jī)以過(guò)失速超機(jī)動(dòng)性、高敏捷性、短距起降性能、低可探測(cè)性和超音速巡航能力，大大提高了戰(zhàn)斗機(jī)的作戰(zhàn)效能和生存能力[1-2]。

飛機(jī)的動(dòng)力裝置配裝推力矢量噴管后，要實(shí)現(xiàn)發(fā)動(dòng)機(jī)矢量推力和飛機(jī)氣動(dòng)舵面的協(xié)同操縱，使飛機(jī)的升降舵、方向舵、襟翼、副翼和發(fā)動(dòng)機(jī)噴管等操縱部件的運(yùn)動(dòng)達(dá)到最佳化，氣動(dòng)舵面與推力矢量的綜合控制技術(shù)就成為現(xiàn)代飛行控制系統(tǒng)設(shè)計(jì)的關(guān)鍵技術(shù)之一。……