def __init__(self, params, topology_factory):
self.k1 = params['k1']
self.topology_factory = topology_factory
self.material = microfem.SoiMumpsMaterial()
self.ind_size = self.topology_factory.ind_size
self.name = '--- Fast Cantilever Optimization ---'
def __init__(self, params, topology_factory):
self.topology_factory = topology_factory
self.material = microfem.SoiMumpsMaterial()
self.n_modes = 1
self.ind_size = self.topology_factory.ind_size
self.name = '--- Off Resonance Cantilever Optimization ---'
def __init__(self, params, topology_factory):
self.a = 5e-6
self.b = 5e-6
self.topology_factory = topology_factory
self.material = microfem.SoiMumpsMaterial()
self.n_modes = params['nmodes']
self.n_ratio = params['nratio']
def __init__(self, params, topology_factory):
self.f1 = params['f1']
self.f2 = params['f2']
self.k1 = params['k1']
self.k2 = params['k2']
self.topology_factory = topology_factory
self.material = microfem.SoiMumpsMaterial()
self.n_modes = 3
self.ind_size = self.topology_factory.ind_size
self.name = '--- Bimodal Cantilever Optimization ---'
funcs = {'stiffness_placement': self.stiffness_placement,
'frequency_minimization': self.frequency_minimization,
'stiffness_minimization': self.stiffness_minimization,
'stiffness_maximization': self.stiffness_maximization,
'frequency_maximization': self.frequency_maximization,
'frequency_placement': self.frequency_placement,
'k1_k2_place': self.k1_k2_place,
'k1_place_k2_min': self.k1_place_k2_min}
if params['type'] not in funcs:
raise ValueError('Bimodal type parameter invalid.')
self.evaluation = funcs[params['type']]
def __init__(self, params, topology_factory):
self.f0 = params['f0']
self.topology_factory = topology_factory
self.material = microfem.SoiMumpsMaterial()
# the deflection at a point on the cantilever. The coordinates are in um and # should be on a solid element. xtip = 250 ytip = 495 # Combine the above parameters into a Cantilever object in the microfem # package. Information about the cantilever can be displayed and the topology # can be plotted. cantilever = microfem.Cantilever(topology, a, b, xtip, ytip) cantilever.to_console() microfem.plot_topology(cantilever) # The material properties for the SOI Mumps manufacturing process has been # stored in an object. The plate finite element model requires both the # cantilever object and material object to initialize. material = microfem.SoiMumpsMaterial() fem = microfem.PlateFEM(material, cantilever) # With the FEM model built, modal analysis can be performed. This returns the # resonance frequencies and mode shapes of the cantilever. These can then be # plotted. n_modes = 3 ws, _, vall = fem.modal_analysis(n_modes=n_modes) # Using the results of the modal analysis, the frequency, stiffness, # tip displacement, and mode type (flexural, torsional), can be determined. coords = (cantilever.xtip, cantilever.ytip) opr = microfem.PlateDisplacement(fem, coords).get_operator() mode_ident = microfem.ModeIdentification(fem, cantilever, type_='plate') freq = np.sqrt(ws) / (2 * np.pi)