UK-DK Dynamics & Vibration Vocabulary
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This list is supposed to contain terms whos translation may not be obvious. It grows by need, so I invite readers to e-mail relevant English or Danish terms, with or without suggested translation to jjth@dtu.dk. Corrections are also welcomed.
Many terms have been added in response to specific requests from students. If I didn't knew or could look up an existing translation I just tried to invent a suitable one, so if you are aware of existing / better translations, please mail them.
If you don't know a translation of a specific term it's usually acceptable, even in professional documents, to use the English one, if you just type it in italics in the Danish text - unless the term is so common that you are supposed to know its translation. For example, 'stress'/'strain' should be translated into the Danish 'spænding'/'tøjning' or your reader will think you are unqualified in this area, while 'single-mode approximation' is so special that you could either type 'single-mode approximation', or just describe in Danish what it is supposed to mean, e.g. 'model med enkelt modalform'.
Jon Juel Thomsen, DTU Civil and Mechanical Engineering
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action [integral] virkning[sintegral(e)].
admissible function tilladelig funktion
angular frequency vinkelfrekvens
angular momentum bevægelsesmængdemoment
angular impulse impulsmoment
antimetric antisymmetrisk
antinode antiknude[punkt/linie] (ikke "antinode")
area momentof inertia fladeinertimoment
asymmetric asymmetrisk, ikke-symmetrisk
attractor attraktor
autonomous [differential equation(s)] autonom [(e) differentialligning(er)]
averaging [method of] midling[smetode(n/r)]
backbone curve rygkurve
bar stang, bjælke
beats modulationssvingninger
bifurcation bifurkation
body legeme
boundary condition randbetingelse
center of mass massemidtpunkt
center of gravity tyngdepunkt
circulatory system cirkulatorisk system
coherence kohærens
completely definite[operator] fuldt (el fuldstændig) definit [operator]
completely dissipative[system] fuldstændigtdissipativt [system]
complex conjugate / conjugated komplekst konjugerede / konjugeret
conservative load konservativ kraft / belastning
conservative system konservativt system
convolution[integral] folding[sintegral]
concert pitch kammertonen(=440 Hz/ 442 Hz / 445 Hz / ... )
cross section tværsnit
damping coefficient dæmpningskonstant
damping ratio dæmpningsforhold
damped vibrations dæmpede svingninger
definite [maxtrix / operator] definit [matrix / operator]
detuning parameter afstemningsparameter
direct excitation direkte / ekstern excitation
dissipation / dissipative dissipation / dissipativ
eigenfrequency egenfrekvens
eigenfunction egenfunktion
eigenvalue egenværdi
eigenvector egenvektor
eigenpair egenpar
elastic modulus Young's modul / elasticitetsmodul[en/et] / E-modul[en/et]
equilibrium [state] ligevægt[stilstand]
extens[i]ometer extens[i]ometer; ekstens[i]ometer
external excitation ekstern / direkte excitation
flexibility [influence] coefficient fleksibilitetsskoefficient;fleksibilitets-influenskoefficient
follower load følgelast, medfølgende belastning
force / forces kraft / kræfter(ikkekræft / krafter!)
forced vibrations tvungne svingninger
forced excitation direkte / ekstern excitation
forskydningskraft shear force
forskydningsspænding shear stress
free vibrations frie svingninger
frequency response [function] frekvensrespons[funktion]
gyroscopic system gyroskopisk system
half-definite = semidefinite
hardening [nonlinearity] hård/hærdende(?) [ikke-linearitet]
Hermitian / Hermite [matrix / eigenvalue problem] Hermite [matrix (= selvadjungeret matrix) / egenværdiproblem]
heteroclinic orbit heteroklin banekurve
homoclinic orbit homoklin banekurve
Hamiltonian Hamilton-funktion
harmonic balance [method of] harmonisk balancering
impulse [kraft-]impuls
impact stød
initial condition begyndelsesbetingelse
instationary load instationær kraft / belastning
instationary system instationært system
intermittent [chaos] intermittent [kaos]
journal [scientific - / paper] tidsskrift [videnskabeligt - / tidsskriftsartikel]
Lagrangian Lagrange-funktion
logarithmic decrement logaritmisk dekrement
linear momentum = momentum
manifold [stable / unstable / center/centre] mangfoldighed [stabil / ustabil / center-]
mass moment of inertia [=moment of inertia] masseinertimoment[=inertimoment]
mode shape egensvingningsform
mode shape expansion modal rækkeudvikling
modulation modulation
modulus of elasticity elasticitetsmodul[en/et] / Young's modul / E-modul[en/et]
moment of inertia [=mass moment of inertia] inertimoment[=masseinertimoment]
momentum bevægelsesmængde
modal analysis modalanalyse
multiple scales [method of] flerskala[metode(n/r)]; multiskala[metode(n/r)]
natural frequency egen[svingnings]frekvens; resonansfrekvens
nodal line knudelinie
nodal point knudepunkt
node knudepunkt (ikke "node")
non- ikke- (f.eks. ikke-konservativ(t), ikke-gyroskopisk, ikke-cirkulatorisk, ikke-lineær)
normal force normalkraft
normal stress normalspænding
nutation nutation
orbit banekurve
orthoghonal[ity] ortogonal[itet]
orthonormal[ity] ortonormal[itet]
overdamped overdæmpet; overkritisk dæmpet
overshoot overskydning
paper [scientific -] artikel [i videnskabeligt tidsskrift / tidsskriftsartikel]
paragraph [in written material] afsnit
parametric [excitation / system] parametrisk [excitation / system]
period periode; svingningstid
perturbation perturbation, (lille) forstyrrelse
perturbation method perturbationsmetode
pitchfork bifurcation høtyv- (pitchfork) bifurkation
Poincaré map Poincaré-afbildning
Poisson's ratio tværkontraktionstal / Poisson's forhold
polar moment of inertia polært inertimoment
power effekt
principal axis hovedakse
principal strain hovedtøjning
principal stress hovedspænding
precession præcession
purely dissipative [system] rent dissipativt [system]
quasiperiodic kvasiperiodisk
quasistatic kvasistatisk
radius of curvature krumningsradius
Rayleigh's quotient Rayleigh's kvotient
resonance frequency resonansfrekvens
rigid body stift legeme; stivlegeme-
rigid body mode stivlegemesvingning
rod stang, stav
rotary inertia rotationsinerti
rotor precession rotor præcession
rotor whirl rotor præcession
saddle-node bifurcation saddel-knudepunkt (/saddle-node) bifurkation
section [in written material] underafsnit [i kapitel]
secular term sekulært led
self-adjoint selvadjungeret
semidefinite [operator / matrix] semidefinit [operator / matrix]
separatrix separatrice
shear force tværkraft / forskydningskraft
shear deformation tværdeformation / forskydningsdeformation
shear stress tværspænding / forskydningsspænding
shear strain tværtøjning / forskydningstøjning
shear modulus tværmodul[en/et] forskydningsmodul[en/et] / elasticitetsmodul[en/et] for forskydning
single-mode approximation model med enkelt modalform
softening [nonlinearity] blød/blødgørende(?) [ikke-linearitet]
solvability condition løsbarhedsbetingelse
sparse matrix tyndt besat matrix
spring fjeder
standing wave stående bølge
stationary load stationær kraft / belastning
stationary state stationær tilstand
stationary system stationært system
stationary vibrations stationære svingninger
steady state stationær tilstand
steady [state] vibrations stationære svingninger
strange attractor sær attraktor
strain tøjning
strain gauge strain gauge; tøjningsmåler
stress spænding
stiffnes [influence] coefficient stivhedskoefficient; stivheds-influenskoefficient
tens[i]ometer tens[i]ometer
term led (i matematisk udtryk) / begreb (sprogligt)
test function test-funktion
test rig forsøgsopstilling
torsion torsion, vridning
trajectory banekurve
transcritical bifurcation transkritisk bifurkation
transient transient; indsvingning
transient response transient respons; indsvingning
transient vibrations transiente svingninger
torque drejningsmoment; vridningsmoment; kraftmoment
transfer function overføringsfunktion
travelling wave bølgeudbredelse
twist snoning, vridning
undamped vibrations udæmpede svingninger
underdamped underdæmpet; underkritisk dæmpet
unique [solution] entydig [løsning] (ikke "unik" [løsning])
Young's modulus Young's modul / elasticitetsmodul[en/et] / E-modul[en/et]